/**
 * grav.css — Dark Gravitational Portfolio Design System
 * Sangramjeet Ghosh Portfolio — Post-Hero Experience
 *
 * This file governs ALL sections after the Hero.
 * The Hero section is in main.css and is untouched.
 */

/* ========================================================
   GRAVITATIONAL DESIGN TOKENS
   ======================================================== */
:root {
    --grav-void:      #030407;
    --grav-deep:      #060a10;
    --grav-dark:      #080d14;
    --grav-mid:       #0d1520;
    --grav-surface:   #121c2a;
    --grav-graphite:  #1e2d3d;
    --grav-border:    rgba(255, 255, 255, 0.06);
    --grav-border-md: rgba(255, 255, 255, 0.12);
    --grav-border-hi: rgba(255, 255, 255, 0.22);
    --grav-silver:    #64748b;
    --grav-muted:     #94a3b8;
    --grav-light:     #cbd5e1;
    --grav-white:     #f1f5f9;
    --grav-pure:      #ffffff;
    --grav-glow-sm:   0 0 20px rgba(255, 255, 255, 0.05);
    --grav-glow-md:   0 0 40px rgba(255, 255, 255, 0.08);
    --grav-glow-lg:   0 0 80px rgba(255, 255, 255, 0.12);
    --grav-ease-in:   cubic-bezier(0.16, 1, 0.3, 1);
    --grav-ease-out:  cubic-bezier(0.7, 0, 0.84, 0);
    --grav-duration:  0.8s;
}

/* ========================================================
   GRAVITATIONAL BASE — POST-HERO WORLD
   ======================================================== */
.grav-section {
    position: relative;
    background: var(--grav-void);
    overflow: hidden;
}

.grav-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent 0%, rgba(255,255,255,0.08) 50%, transparent 100%);
    pointer-events: none;
}

.grav-container {
    max-width: 1320px;
    margin: 0 auto;
    padding: 0 6%;
}

/* Section Number Landmark */
.grav-section-num {
    font-size: clamp(7rem, 12vw, 12rem);
    font-weight: 100;
    color: rgba(255, 255, 255, 0.04);
    letter-spacing: -0.04em;
    line-height: 1;
    font-variant-numeric: tabular-nums;
    user-select: none;
    position: absolute;
    top: 2rem;
    left: 5%;
    pointer-events: none;
    z-index: 0;
}

/* Section Label */
.grav-label {
    display: inline-block;
    font-size: 0.85rem;
    font-weight: 600;
    letter-spacing: 0.3em;
    text-transform: uppercase;
    color: var(--grav-silver);
    position: relative;
    z-index: 1;
}

.grav-label::before {
    content: '—';
    margin-right: 0.6em;
    opacity: 0.4;
}

/* Gravitational divider */
.grav-divider {
    width: 100%;
    height: 1px;
    background: var(--grav-border);
    margin: 0;
}

/* Reveal Animation Classes */
.grav-reveal {
    opacity: 0;
    transform: translateY(40px);
    transition: opacity 0.9s var(--grav-ease-in), transform 0.9s var(--grav-ease-in);
}

.grav-reveal.visible {
    opacity: 1;
    transform: translateY(0);
}

.grav-reveal-delay-1 { transition-delay: 0.1s; }
.grav-reveal-delay-2 { transition-delay: 0.2s; }
.grav-reveal-delay-3 { transition-delay: 0.35s; }
.grav-reveal-delay-4 { transition-delay: 0.5s; }
.grav-reveal-delay-5 { transition-delay: 0.65s; }

/* ========================================================
   GRAVITATIONAL BUTTON
   ======================================================== */
.grav-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.8rem;
    padding: 1.2rem 2.8rem;
    font-size: 1.3rem;
    font-weight: 600;
    letter-spacing: 0.08em;
    border-radius: 0.3rem;
    transition: all 0.3s var(--grav-ease-in);
    text-decoration: none;
    cursor: pointer;
    border: none;
    font-family: inherit;
}

/* .project-link is used on both <a> and <button> */
button.project-link {
    background: none;
    border: none;
    font-family: inherit;
    cursor: pointer;
}

.grav-btn-primary {
    background: var(--grav-pure);
    color: var(--grav-void);
}

.grav-btn-primary:hover {
    background: var(--grav-light);
    transform: translateY(-2px);
    box-shadow: 0 8px 30px rgba(255, 255, 255, 0.15);
}

.grav-btn-ghost {
    background: transparent;
    color: var(--grav-light);
    border: 1px solid var(--grav-border-md);
}

.grav-btn-ghost:hover {
    border-color: var(--grav-border-hi);
    color: var(--grav-pure);
    transform: translateY(-2px);
}

/* ========================================================
   SECTION 01 — IDENTITY (#about)
   ======================================================== */
#about.grav-section::before {
    display: none;
}

#about.grav-section {
    padding: 14rem 0 12rem;
    min-height: 100vh;
    display: flex;
    align-items: center;
    background: var(--grav-void);
}

.identity-grid {
    display: grid;
    grid-template-columns: 1fr 1.4fr;
    gap: 0;
    align-items: start;
    position: relative;
    z-index: 1;
}

.identity-left {
    padding-right: 6rem;
    border-right: 1px solid var(--grav-border);
    position: sticky;
    top: 30vh;
    height: fit-content;
    will-change: transform;
}

.identity-headline {
    font-size: clamp(4rem, 5.5vw, 5.6rem);
    font-weight: 800;
    color: var(--grav-pure);
    line-height: 1.05;
    letter-spacing: -0.03em;
    margin-bottom: 1.2rem;
}

.identity-headline span {
    color: var(--grav-muted);
}

.identity-role {
    font-size: 1.3rem;
    color: var(--grav-silver);
    letter-spacing: 0.12em;
    text-transform: uppercase;
    font-weight: 500;
    margin-bottom: 3.6rem;
}

.identity-stats {
    display: flex;
    flex-direction: column;
    gap: 0;
}

.identity-stat {
    display: flex;
    align-items: baseline;
    gap: 1.4rem;
    padding: 1.8rem 0;
    border-top: 1px solid var(--grav-border);
}

.identity-stat:last-child {
    border-bottom: 1px solid var(--grav-border);
}

.stat-number {
    font-size: 2.8rem;
    font-weight: 700;
    color: var(--grav-pure);
    letter-spacing: -0.02em;
    min-width: 6rem;
}

.stat-desc {
    font-size: 1.25rem;
    color: var(--grav-silver);
    letter-spacing: 0.05em;
}

.identity-right {
    padding-left: 6rem;
    will-change: transform;
}

.identity-bio {
    font-size: 1.75rem;
    line-height: 1.75;
    color: var(--grav-light);
    margin-bottom: 5rem;
    font-weight: 400;
    max-width: 58ch;
}

.identity-bio strong {
    color: var(--grav-pure);
    font-weight: 600;
}

.identity-fields {
    display: flex;
    flex-direction: column;
    gap: 0;
}

.identity-field {
    display: grid;
    grid-template-columns: 16rem 1fr;
    align-items: start;
    gap: 2rem;
    padding: 2.2rem 0;
    border-top: 1px solid var(--grav-border);
    transition: border-color 0.3s ease;
}

.identity-field:last-child {
    border-bottom: 1px solid var(--grav-border);
}

.identity-field:hover {
    border-top-color: var(--grav-border-md);
}

.field-label {
    font-size: 1.1rem;
    color: var(--grav-silver);
    letter-spacing: 0.15em;
    text-transform: uppercase;
    font-weight: 500;
    padding-top: 0.2rem;
}

.field-value {
    font-size: 1.4rem;
    color: var(--grav-light);
    line-height: 1.6;
}

.field-value a {
    color: var(--grav-pure);
    text-decoration: underline;
    text-underline-offset: 4px;
    text-decoration-color: var(--grav-border-md);
    transition: text-decoration-color 0.3s ease;
}

.field-value a:hover {
    text-decoration-color: var(--grav-pure);
}

.identity-cta-row {
    margin-top: 5rem;
    display: flex;
    gap: 2.4rem;
    align-items: center;
    flex-wrap: wrap;
}

/* ========================================================
   SECTION 02 — TRAJECTORY (#journey)
   ======================================================== */
#journey.grav-section {
    padding: 14rem 0 12rem;
}

.trajectory-header {
    margin-bottom: 8rem;
    position: relative;
    z-index: 1;
}

.trajectory-title {
    font-size: clamp(4rem, 6vw, 6rem);
    font-weight: 800;
    color: var(--grav-pure);
    letter-spacing: -0.04em;
    line-height: 1;
    margin-top: 1.6rem;
}

.trajectory-subtitle {
    font-size: 1.5rem;
    color: var(--grav-silver);
    margin-top: 2rem;
    max-width: 52ch;
    line-height: 1.6;
}

.trajectory-track {
    position: relative;
    padding-left: 5.4rem;
}

.trajectory-axis {
    position: absolute;
    left: 1.6rem;
    top: 0.8rem;
    bottom: 0;
    width: 1px;
    background: var(--grav-border);
}

.trajectory-axis-progress {
    width: 100%;
    background: rgba(255, 255, 255, 0.5);
    transition: height 0.3s ease;
    height: 0;
    box-shadow: 0 0 12px rgba(255, 255, 255, 0.4);
}

.trajectory-milestone {
    position: relative;
    padding: 0 0 7rem;
    opacity: 0.35;
    transition: opacity 0.5s var(--grav-ease-in);
}

.trajectory-milestone.active {
    opacity: 1;
}

.trajectory-milestone::before {
    content: '';
    position: absolute;
    left: -4rem;
    top: 0.85rem;
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: var(--grav-graphite);
    border: 1px solid var(--grav-border-md);
    transition: all 0.4s ease;
}

.trajectory-milestone.active::before {
    background: var(--grav-pure);
    border-color: var(--grav-pure);
    box-shadow: 0 0 16px rgba(255, 255, 255, 0.5);
}

.milestone-year {
    font-size: clamp(5rem, 8vw, 9rem);
    font-weight: 100;
    color: rgba(255, 255, 255, 0.04);
    letter-spacing: -0.04em;
    line-height: 1;
    position: absolute;
    right: 0;
    top: -1.5rem;
    user-select: none;
    pointer-events: none;
    transition: color 0.5s ease;
}

.trajectory-milestone.active .milestone-year {
    color: rgba(255, 255, 255, 0.06);
}

.milestone-period {
    font-size: 1.05rem;
    color: var(--grav-silver);
    letter-spacing: 0.2em;
    text-transform: uppercase;
    font-weight: 500;
    margin-bottom: 1.2rem;
}

.milestone-title {
    font-size: clamp(2rem, 3vw, 2.8rem);
    font-weight: 700;
    color: var(--grav-white);
    letter-spacing: -0.02em;
    margin-bottom: 1.4rem;
    line-height: 1.2;
}

.milestone-desc {
    font-size: 1.45rem;
    color: var(--grav-muted);
    line-height: 1.7;
    max-width: 65ch;
    margin-bottom: 2rem;
}

.milestone-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.8rem;
}

.milestone-tag {
    font-size: 1.1rem;
    color: var(--grav-silver);
    padding: 0.4rem 1.2rem;
    border: 1px solid var(--grav-border);
    border-radius: 0.2rem;
    letter-spacing: 0.05em;
    font-family: 'JetBrains Mono', 'Courier New', monospace;
    transition: all 0.3s ease;
}

.trajectory-milestone.active .milestone-tag {
    border-color: var(--grav-border-md);
    color: var(--grav-light);
}

/* ========================================================
   SECTION 03 — SYSTEMS (#architecture)
   ======================================================== */
#architecture.grav-section {
    padding: 14rem 0 12rem;
}

.systems-header {
    margin-bottom: 7rem;
    position: relative;
    z-index: 1;
}

.systems-title {
    font-size: clamp(4rem, 6vw, 6rem);
    font-weight: 800;
    color: var(--grav-pure);
    letter-spacing: -0.04em;
    line-height: 1;
    margin-top: 1.6rem;
}

.systems-subtitle {
    font-size: 1.45rem;
    color: var(--grav-silver);
    margin-top: 1.8rem;
    max-width: 55ch;
    line-height: 1.65;
}

.systems-blueprint {
    display: grid;
    grid-template-columns: 1fr 1.2fr;
    gap: 5rem;
    align-items: start;
}

.systems-pipeline {
    display: flex;
    flex-direction: column;
    gap: 0;
    position: relative;
}

.sys-node {
    position: relative;
    display: flex;
    align-items: stretch;
    cursor: pointer;
    border-top: 1px solid var(--grav-border);
    padding: 2.2rem 0;
    transition: all 0.3s var(--grav-ease-in);
    gap: 2rem;
    overflow: hidden;
}

.sys-node:last-child {
    border-bottom: 1px solid var(--grav-border);
}

.sys-node-num {
    font-size: 1.1rem;
    color: var(--grav-silver);
    font-family: 'JetBrains Mono', monospace;
    font-weight: 400;
    min-width: 3.5rem;
    opacity: 0.5;
    padding-top: 0.1rem;
    transition: opacity 0.3s ease;
}

.sys-node-body {
    flex: 1;
}

.sys-node-label {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--grav-light);
    margin-bottom: 0.4rem;
    transition: color 0.3s ease;
}

.sys-node-sub {
    font-size: 1.15rem;
    color: var(--grav-silver);
    font-family: 'JetBrains Mono', monospace;
    transition: color 0.3s ease;
}

.sys-node-arrow {
    font-size: 1.2rem;
    color: var(--grav-border-md);
    display: flex;
    align-items: center;
    transition: all 0.3s ease;
    opacity: 0;
    padding-right: 0.5rem;
}

.sys-node-signal {
    position: absolute;
    left: 0;
    bottom: 0;
    width: 0;
    height: 1px;
    background: var(--grav-pure);
    box-shadow: 0 0 8px rgba(255, 255, 255, 0.6);
    transition: width 0.35s var(--grav-ease-in);
    pointer-events: none;
}

.sys-node:hover,
.sys-node.active {
    border-top-color: var(--grav-border-md);
}

.sys-node:hover .sys-node-num,
.sys-node.active .sys-node-num { opacity: 1; color: var(--grav-muted); }

.sys-node:hover .sys-node-label,
.sys-node.active .sys-node-label { color: var(--grav-pure); }

.sys-node:hover .sys-node-sub,
.sys-node.active .sys-node-sub { color: var(--grav-muted); }

.sys-node:hover .sys-node-arrow,
.sys-node.active .sys-node-arrow { opacity: 1; color: var(--grav-muted); }

.sys-node.active .sys-node-signal { width: 100%; }

.systems-inspector {
    position: sticky;
    top: 15vh;
    background: var(--grav-dark);
    border: 1px solid var(--grav-border);
    padding: 3.5rem;
    border-radius: 0.3rem;
    transition: all 0.4s var(--grav-ease-in);
}

.inspector-label {
    font-size: 1rem;
    color: var(--grav-silver);
    letter-spacing: 0.25em;
    text-transform: uppercase;
    margin-bottom: 2rem;
    display: flex;
    align-items: center;
    gap: 0.8rem;
}

.inspector-live-dot {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: rgba(255,255,255,0.7);
    box-shadow: 0 0 8px rgba(255,255,255,0.5);
    animation: inspectorPulse 2s ease-in-out infinite;
}

@keyframes inspectorPulse {
    0%, 100% { opacity: 0.5; }
    50% { opacity: 1; }
}

.inspector-title {
    font-size: 2.2rem;
    font-weight: 700;
    color: var(--grav-pure);
    letter-spacing: -0.02em;
    line-height: 1.3;
    margin-bottom: 1.8rem;
}

.inspector-desc {
    font-size: 1.4rem;
    color: var(--grav-muted);
    line-height: 1.7;
    margin-bottom: 3rem;
}

.inspector-data {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.6rem;
    margin-bottom: 2.8rem;
}

.inspector-datum {
    border-top: 1px solid var(--grav-border);
    padding-top: 1.2rem;
}

.datum-key {
    font-size: 1.05rem;
    color: var(--grav-silver);
    letter-spacing: 0.12em;
    text-transform: uppercase;
    margin-bottom: 0.5rem;
}

.datum-val {
    font-size: 1.3rem;
    color: var(--grav-light);
    font-family: 'JetBrains Mono', monospace;
}

.inspector-deployments {
    border-top: 1px solid var(--grav-border);
    padding-top: 1.8rem;
}

.deployment-label {
    font-size: 1rem;
    color: var(--grav-silver);
    letter-spacing: 0.15em;
    text-transform: uppercase;
    margin-bottom: 1rem;
}

.deployment-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.6rem;
}

.deployment-tag {
    font-size: 1.15rem;
    color: var(--grav-muted);
    padding: 0.4rem 1rem;
    border: 1px solid var(--grav-border);
    border-radius: 0.2rem;
    font-family: 'JetBrains Mono', monospace;
}

/* ========================================================
   SECTION 04 — ARSENAL (#skills)
   ======================================================== */
#skills.grav-section {
    padding: 14rem 0 12rem;
}

.arsenal-header {
    margin-bottom: 7rem;
    position: relative;
    z-index: 1;
}

.arsenal-title {
    font-size: clamp(4rem, 6vw, 6rem);
    font-weight: 800;
    color: var(--grav-pure);
    letter-spacing: -0.04em;
    line-height: 1;
    margin-top: 1.6rem;
}

.arsenal-subtitle {
    font-size: 1.45rem;
    color: var(--grav-silver);
    margin-top: 1.8rem;
    max-width: 55ch;
    line-height: 1.65;
}

.arsenal-layout {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 6rem;
    align-items: start;
}

.arsenal-category-group {
    border-top: 1px solid var(--grav-border);
    padding: 2.8rem 0;
    transition: all 0.3s ease;
}

.arsenal-category-group:last-child {
    border-bottom: 1px solid var(--grav-border);
}

.category-label-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 2rem;
}

.category-name {
    font-size: 1.1rem;
    color: var(--grav-silver);
    letter-spacing: 0.2em;
    text-transform: uppercase;
    font-weight: 600;
}

.category-count {
    font-size: 1.1rem;
    color: var(--grav-border-hi);
    font-family: 'JetBrains Mono', monospace;
}

.category-skills-list {
    display: flex;
    flex-wrap: wrap;
    gap: 0.8rem;
}

.cat-skill-chip {
    font-size: 1.25rem;
    color: var(--grav-muted);
    padding: 0.6rem 1.3rem;
    border: 1px solid var(--grav-border);
    border-radius: 0.2rem;
    font-family: 'JetBrains Mono', monospace;
    cursor: pointer;
    transition: all 0.3s var(--grav-ease-in);
    background: transparent;
}

.cat-skill-chip:hover {
    border-color: var(--grav-border-md);
    color: var(--grav-light);
    background: var(--grav-mid);
    transform: translateY(-2px);
}

/* Right col: depth field */
.arsenal-depth-field {
    position: sticky;
    top: 20vh;
}

.arsenal-core-display {
    width: 100%;
    aspect-ratio: 1;
    max-width: 420px;
    margin: 0 auto;
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
}

.core-ring-outer {
    position: absolute;
    width: 100%;
    height: 100%;
    border-radius: 50%;
    border: 1px dashed var(--grav-border);
    animation: coreSpinSlow 80s linear infinite;
}

.core-ring-mid {
    position: absolute;
    width: 70%;
    height: 70%;
    border-radius: 50%;
    border: 1px solid var(--grav-border);
    animation: coreSpinSlow 50s linear infinite reverse;
}

.core-ring-inner {
    position: absolute;
    width: 42%;
    height: 42%;
    border-radius: 50%;
    border: 1px solid var(--grav-border-md);
    background: var(--grav-dark);
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 0 40px rgba(0,0,0,0.8);
}

.core-ring-inner span {
    font-size: 1.1rem;
    color: var(--grav-silver);
    letter-spacing: 0.18em;
    text-transform: uppercase;
    font-weight: 600;
    text-align: center;
    line-height: 1.4;
}

@keyframes coreSpinSlow {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

/* Orbiting skill dots */
.core-orbit-skills {
    position: absolute;
    width: 100%;
    height: 100%;
    top: 0;
    left: 0;
}

.orbit-skill-dot {
    position: absolute;
    left: 50%;
    top: 50%;
    font-size: 1.05rem;
    color: var(--grav-silver);
    font-family: 'JetBrains Mono', monospace;
    white-space: nowrap;
    letter-spacing: 0.05em;
    cursor: default;
    transition: color 0.3s ease;
    transform-origin: 0 0;
    background: transparent;
    padding: 0.2rem 0.4rem;
    pointer-events: none;
}

.orbit-skill-dot:hover {
    color: var(--grav-pure);
}

.arsenal-github-cta {
    margin-top: 4rem;
    display: flex;
    align-items: center;
    gap: 2rem;
}

/* ========================================================
   SECTION 05 — PROJECTS (#projects)
   ======================================================== */
#projects.grav-section {
    padding: 14rem 0 10rem;
}

.projects-header {
    margin-bottom: 8rem;
    position: relative;
    z-index: 1;
}

.projects-title {
    font-size: clamp(4rem, 6vw, 6rem);
    font-weight: 800;
    color: var(--grav-pure);
    letter-spacing: -0.04em;
    line-height: 1;
    margin-top: 1.6rem;
}

.projects-subtitle {
    font-size: 1.45rem;
    color: var(--grav-silver);
    margin-top: 1.8rem;
    max-width: 55ch;
    line-height: 1.65;
}

.project-panels {
    display: flex;
    flex-direction: column;
    gap: 0;
}

.project-panel {
    position: relative;
    border-top: 1px solid var(--grav-border);
    padding: 6rem 0;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 6rem;
    align-items: center;
    overflow: hidden;
    transition: border-color 0.4s ease;
    cursor: pointer;
}

.project-panel:last-child {
    border-bottom: 1px solid var(--grav-border);
}

.project-panel:hover {
    border-top-color: var(--grav-border-md);
}

.project-index {
    position: absolute;
    right: -1rem;
    top: 50%;
    transform: translateY(-50%);
    font-size: clamp(10rem, 16vw, 18rem);
    font-weight: 100;
    color: rgba(255, 255, 255, 0.025);
    letter-spacing: -0.05em;
    user-select: none;
    pointer-events: none;
    line-height: 1;
    transition: color 0.4s ease;
}

.project-panel:hover .project-index {
    color: rgba(255, 255, 255, 0.04);
}

.project-info {
    position: relative;
    z-index: 2;
}

.project-status {
    display: flex;
    align-items: center;
    gap: 0.8rem;
    margin-bottom: 2rem;
}

.project-status-dot {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: rgba(255,255,255,0.5);
    box-shadow: 0 0 8px rgba(255,255,255,0.3);
}

.project-status-text {
    font-size: 1.05rem;
    color: var(--grav-silver);
    letter-spacing: 0.2em;
    text-transform: uppercase;
}

.project-name {
    font-size: clamp(2.6rem, 3.5vw, 3.6rem);
    font-weight: 800;
    color: var(--grav-pure);
    letter-spacing: -0.03em;
    line-height: 1.1;
    margin-bottom: 1.4rem;
    transition: color 0.3s ease;
}

.project-tagline {
    font-size: 1.4rem;
    color: var(--grav-muted);
    line-height: 1.6;
    margin-bottom: 2.4rem;
    max-width: 45ch;
}

.project-stack {
    font-size: 1.2rem;
    color: var(--grav-silver);
    font-family: 'JetBrains Mono', monospace;
    letter-spacing: 0.03em;
    margin-bottom: 3.5rem;
    line-height: 1.8;
}

.project-stack-sep {
    color: var(--grav-graphite);
    margin: 0 0.5rem;
}

.project-links {
    display: flex;
    gap: 3rem;
    align-items: center;
}

.project-link {
    font-size: 1.35rem;
    color: var(--grav-muted);
    text-decoration: none;
    letter-spacing: 0.05em;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    transition: all 0.3s ease;
    border-bottom: 1px solid transparent;
    padding-bottom: 0.2rem;
}

.project-link:hover {
    color: var(--grav-pure);
    border-bottom-color: var(--grav-pure);
}

.project-link-arrow {
    font-size: 1.1rem;
    transition: transform 0.3s ease;
}

.project-link:hover .project-link-arrow {
    transform: translate(2px, -2px);
}

.project-visual {
    position: relative;
    z-index: 2;
    height: 300px;
    border: 1px solid var(--grav-border);
    border-radius: 0.3rem;
    overflow: hidden;
    background: var(--grav-dark);
    transition: border-color 0.4s ease, box-shadow 0.4s ease;
}

.project-panel:hover .project-visual {
    border-color: var(--grav-border-md);
    box-shadow: var(--grav-glow-md);
}

.project-visual {
    cursor: pointer;
}

.project-visual:focus-visible {
    outline: 1px solid var(--grav-border-hi);
    outline-offset: 3px;
}

/* Screenshot preview plate */
.project-visual-card {
    width: 100%;
    height: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 1.4rem;
    background:
        radial-gradient(ellipse 80% 70% at 50% 30%, rgba(255, 255, 255, 0.05) 0%, transparent 70%),
        var(--grav-dark);
}

/* Screenshot variant — shimmer while image loads */
.project-visual-card.pv-screenshot {
    background: linear-gradient(
        110deg,
        var(--grav-dark) 30%,
        rgba(255, 255, 255, 0.04) 50%,
        var(--grav-dark) 70%
    );
    background-size: 200% 100%;
    animation: pvShimmer 1.8s linear infinite;
    padding: 0;
    gap: 0;
}

@keyframes pvShimmer {
    0%   { background-position: 200% 0; }
    100% { background-position: -200% 0; }
}

/* Once image loads, stop the shimmer */
.project-visual-card.pv-screenshot:has(.pv-screenshot-img[src]) {
    animation: none;
    background: var(--grav-dark);
}

.pv-screenshot-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: top center;
    display: block;
    transition: transform 0.5s cubic-bezier(0.4, 0, 0.2, 1), filter 0.4s ease;
    filter: brightness(0.9) saturate(0.95);
}

.project-panel:hover .pv-screenshot-img {
    transform: scale(1.04);
    filter: brightness(1) saturate(1.05);
}

/* Fallback: shimmer stopped, show centred monogram */
.project-visual-card.pv-fallback {
    animation: none;
    background:
        radial-gradient(ellipse 80% 70% at 50% 30%, rgba(255, 255, 255, 0.05) 0%, transparent 70%),
        var(--grav-dark);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 1.4rem;
}

.pv-mark {
    font-size: 5.6rem;
    font-weight: 200;
    letter-spacing: 0.04em;
    color: var(--grav-white);
    opacity: 0.85;
    line-height: 1;
    transition: opacity 0.4s var(--grav-ease-in);
}

.project-panel:hover .pv-mark {
    opacity: 1;
}

.pv-host {
    font-family: 'JetBrains Mono', monospace;
    font-size: 1.15rem;
    letter-spacing: 0.1em;
    color: var(--grav-silver);
}

.project-visual-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(to bottom, transparent 45%, rgba(6, 10, 16, 0.75) 100%);
    z-index: 1;
    display: flex;
    align-items: flex-end;
    justify-content: flex-end;
    padding: 1.5rem;
    pointer-events: none;
}

.project-expand-hint {
    font-size: 1.1rem;
    color: var(--grav-light);
    letter-spacing: 0.12em;
    text-transform: uppercase;
    opacity: 0;
    transition: opacity 0.3s ease;
    padding: 0.5rem 1rem;
    border: 1px solid var(--grav-border-md);
    border-radius: 0.2rem;
    background: rgba(8, 13, 20, 0.9);
}

.project-panel:hover .project-expand-hint {
    opacity: 1;
}

.project-visual-custom {
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-direction: column;
    gap: 2rem;
}

.sana-gravity-visual {
    width: 100%;
    height: 100%;
    background: var(--grav-dark);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 2.5rem;
}

.sana-gravity-ring {
    width: 70px;
    height: 70px;
    border-radius: 50%;
    border: 1.5px solid rgba(255,255,255,0.2);
    box-shadow: 0 0 30px rgba(255,255,255,0.08), inset 0 0 20px rgba(255,255,255,0.04);
    animation: sanaGravPulse 3s ease-in-out infinite;
}

@keyframes sanaGravPulse {
    0%, 100% { transform: scale(0.95); border-color: rgba(255,255,255,0.12); }
    50% { transform: scale(1.05); border-color: rgba(255,255,255,0.3); }
}

.sana-gravity-waves {
    display: flex;
    gap: 4px;
    align-items: center;
}

.sana-gravity-waves span {
    display: block;
    width: 3px;
    background: rgba(255,255,255,0.2);
    border-radius: 2px;
    animation: sanaWave 1.4s ease-in-out infinite;
}

.sana-gravity-waves span:nth-child(1) { height: 12px; animation-delay: 0s; }
.sana-gravity-waves span:nth-child(2) { height: 24px; animation-delay: 0.1s; }
.sana-gravity-waves span:nth-child(3) { height: 36px; animation-delay: 0.2s; }
.sana-gravity-waves span:nth-child(4) { height: 26px; animation-delay: 0.3s; }
.sana-gravity-waves span:nth-child(5) { height: 14px; animation-delay: 0.4s; }
.sana-gravity-waves span:nth-child(6) { height: 30px; animation-delay: 0.5s; }
.sana-gravity-waves span:nth-child(7) { height: 18px; animation-delay: 0.6s; }

@keyframes sanaWave {
    0%, 100% { transform: scaleY(0.5); opacity: 0.3; }
    50% { transform: scaleY(1); opacity: 0.85; }
}

.sana-visual-label {
    font-size: 1.15rem;
    color: var(--grav-silver);
    letter-spacing: 0.15em;
    text-transform: uppercase;
    text-align: center;
}

.projects-more {
    margin-top: 6rem;
    padding-top: 3rem;
    border-top: 1px solid var(--grav-border);
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 2rem;
}

.projects-more-text {
    font-size: 1.3rem;
    color: var(--grav-silver);
}

/* ========================================================
   SECTION 06 — TERMINAL (#terminal)
   ======================================================== */
#terminal.grav-section {
    padding: 14rem 0 12rem;
}

.terminal-grav-header {
    margin-bottom: 5rem;
    position: relative;
    z-index: 1;
}

.terminal-grav-title {
    font-size: clamp(4rem, 6vw, 6rem);
    font-weight: 800;
    color: var(--grav-pure);
    letter-spacing: -0.04em;
    line-height: 1;
    margin-top: 1.6rem;
}

.terminal-grav-subtitle {
    font-size: 1.45rem;
    color: var(--grav-silver);
    margin-top: 1.8rem;
    max-width: 55ch;
    line-height: 1.65;
}

.terminal-shell {
    background: #000000;
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 0.3rem;
    overflow: hidden;
    max-width: 860px;
}

.terminal-shell-bar {
    background: rgba(255,255,255,0.03);
    border-bottom: 1px solid rgba(255,255,255,0.06);
    padding: 1.4rem 2rem;
    display: flex;
    align-items: center;
    gap: 1.5rem;
}

.terminal-shell-identity {
    font-size: 1.2rem;
    color: rgba(255,255,255,0.3);
    font-family: 'JetBrains Mono', monospace;
    letter-spacing: 0.05em;
}

.terminal-shell-status {
    margin-left: auto;
    font-size: 1.1rem;
    color: rgba(255,255,255,0.2);
    font-family: 'JetBrains Mono', monospace;
    display: flex;
    align-items: center;
    gap: 0.6rem;
}

.terminal-status-blink {
    display: inline-block;
    width: 6px;
    height: 12px;
    background: rgba(255,255,255,0.5);
    animation: termBlink 1s step-end infinite;
    border-radius: 1px;
}

@keyframes termBlink {
    0%, 100% { opacity: 1; }
    50% { opacity: 0; }
}

.terminal-shell-output {
    padding: 2.5rem 2.5rem 1.5rem;
    min-height: 280px;
    max-height: 400px;
    overflow-y: auto;
    scrollbar-width: thin;
    scrollbar-color: rgba(255,255,255,0.08) transparent;
}

.terminal-shell-output::-webkit-scrollbar { width: 4px; }
.terminal-shell-output::-webkit-scrollbar-track { background: transparent; }
.terminal-shell-output::-webkit-scrollbar-thumb {
    background: rgba(255,255,255,0.08);
    border-radius: 2px;
}

.term-grav-line {
    font-family: 'JetBrains Mono', 'Courier New', monospace;
    font-size: 1.3rem;
    line-height: 1.8;
    color: rgba(255,255,255,0.65);
    margin: 0;
}

.term-grav-prompt { color: rgba(255,255,255,0.3); }
.term-grav-cmd { color: rgba(255,255,255,0.9); }
.term-grav-key { color: rgba(255,255,255,0.45); }
.term-grav-val { color: rgba(255,255,255,0.8); }
.term-grav-sys { color: rgba(255,255,255,0.2); }

.term-grav-separator {
    border: none;
    border-top: 1px solid rgba(255,255,255,0.04);
    margin: 1rem 0;
}

.terminal-shell-input-row {
    display: flex;
    align-items: center;
    padding: 1.5rem 2.5rem 2rem;
    border-top: 1px solid rgba(255,255,255,0.04);
    gap: 1rem;
}

.term-grav-prompt-label {
    font-family: 'JetBrains Mono', monospace;
    font-size: 1.3rem;
    color: rgba(255,255,255,0.3);
    white-space: nowrap;
}

.term-grav-input {
    flex: 1;
    background: transparent;
    border: none;
    outline: none;
    font-family: 'JetBrains Mono', monospace;
    font-size: 1.3rem;
    color: rgba(255,255,255,0.85);
    caret-color: rgba(255,255,255,0.7);
}

.term-grav-input::placeholder { color: rgba(255,255,255,0.12); }

.term-grav-submit {
    background: transparent;
    border: 1px solid rgba(255,255,255,0.08);
    border-radius: 0.2rem;
    color: rgba(255,255,255,0.35);
    padding: 0.5rem 1rem;
    cursor: pointer;
    font-size: 1.2rem;
    transition: all 0.3s ease;
}

.term-grav-submit:hover {
    border-color: rgba(255,255,255,0.25);
    color: rgba(255,255,255,0.75);
}

.terminal-grav-chips {
    display: flex;
    flex-wrap: wrap;
    gap: 0.8rem;
    margin-top: 2.5rem;
}

.term-grav-chip {
    font-family: 'JetBrains Mono', monospace;
    font-size: 1.15rem;
    color: var(--grav-silver);
    padding: 0.5rem 1.4rem;
    border: 1px solid var(--grav-border);
    border-radius: 0.2rem;
    cursor: pointer;
    background: transparent;
    transition: all 0.3s ease;
    letter-spacing: 0.05em;
}

.term-grav-chip:hover {
    border-color: var(--grav-border-md);
    color: var(--grav-light);
    background: var(--grav-dark);
}

/* ========================================================
   SECTION 07 — ARCHIVE (#achievements)
   ======================================================== */
#achievements.grav-section {
    padding: 14rem 0 12rem;
}

.archive-header {
    margin-bottom: 7rem;
    position: relative;
    z-index: 1;
}

.archive-title {
    font-size: clamp(4rem, 6vw, 6rem);
    font-weight: 800;
    color: var(--grav-pure);
    letter-spacing: -0.04em;
    line-height: 1;
    margin-top: 1.6rem;
}

.archive-subtitle {
    font-size: 1.45rem;
    color: var(--grav-silver);
    margin-top: 1.8rem;
    max-width: 55ch;
    line-height: 1.65;
}

.archive-shelf {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    border-top: 1px solid var(--grav-border);
    border-left: 1px solid var(--grav-border);
}

.archive-panel {
    padding: 4rem 3.5rem;
    background: var(--grav-void);
    transition: all 0.4s var(--grav-ease-in);
    cursor: default;
    position: relative;
    overflow: hidden;
    border-right: 1px solid var(--grav-border);
    border-bottom: 1px solid var(--grav-border);
}

.archive-panel:hover {
    background: var(--grav-dark);
    transform: translateY(-3px);
    box-shadow: var(--grav-glow-sm);
}

.archive-num {
    font-size: 5.5rem;
    font-weight: 100;
    color: rgba(255, 255, 255, 0.035);
    letter-spacing: -0.04em;
    line-height: 1;
    margin-bottom: 2.4rem;
    user-select: none;
    transition: color 0.4s ease;
}

.archive-panel:hover .archive-num {
    color: rgba(255, 255, 255, 0.06);
}

.archive-meta {
    font-size: 1.05rem;
    color: var(--grav-silver);
    letter-spacing: 0.2em;
    text-transform: uppercase;
    font-weight: 600;
    margin-bottom: 1.4rem;
}

.archive-name {
    font-size: 1.9rem;
    font-weight: 700;
    color: var(--grav-white);
    letter-spacing: -0.02em;
    line-height: 1.3;
    margin-bottom: 1.2rem;
}

.archive-desc {
    font-size: 1.3rem;
    color: var(--grav-muted);
    line-height: 1.65;
}

/* ========================================================
   SECTION 08 — CREDENTIALS (#certi)
   ======================================================== */
#certi.grav-section {
    padding: 10rem 0 10rem;
}

.credentials-header {
    margin-bottom: 5rem;
    position: relative;
    z-index: 1;
}

.credentials-title {
    font-size: clamp(3.5rem, 5vw, 5rem);
    font-weight: 800;
    color: var(--grav-pure);
    letter-spacing: -0.04em;
    line-height: 1;
    margin-top: 1.6rem;
}

.credentials-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    border: 1px solid var(--grav-border);
    margin-bottom: 5rem;
}

.credential-stat {
    padding: 3rem;
    border-right: 1px solid var(--grav-border);
    transition: background 0.3s ease;
}

.credential-stat:last-child { border-right: none; }

.credential-stat:hover { background: var(--grav-dark); }

.cred-stat-num {
    font-size: 5rem;
    font-weight: 800;
    color: var(--grav-pure);
    letter-spacing: -0.04em;
    line-height: 1;
    margin-bottom: 0.6rem;
}

.cred-stat-label {
    font-size: 1.1rem;
    color: var(--grav-silver);
    letter-spacing: 0.15em;
    text-transform: uppercase;
}

.grav-marquee-container {
    position: relative;
    overflow: hidden;
    mask-image: linear-gradient(90deg, transparent 0%, rgba(0,0,0,1) 10%, rgba(0,0,0,1) 90%, transparent 100%);
    -webkit-mask-image: linear-gradient(90deg, transparent 0%, rgba(0,0,0,1) 10%, rgba(0,0,0,1) 90%, transparent 100%);
    margin-bottom: 4rem;
}

.grav-marquee-track {
    display: flex;
    gap: 2rem;
    animation: gravMarqueeScroll 40s linear infinite;
    width: max-content;
}

@keyframes gravMarqueeScroll {
    0% { transform: translateX(0); }
    100% { transform: translateX(-50%); }
}

.grav-marquee-item {
    flex-shrink: 0;
    display: flex;
    align-items: center;
    gap: 1.2rem;
    padding: 1.2rem 2rem;
    border: 1px solid var(--grav-border);
    border-radius: 0.2rem;
    background: var(--grav-dark);
    transition: border-color 0.3s ease;
}

.grav-marquee-item:hover { border-color: var(--grav-border-md); }

.grav-marquee-item img {
    width: 36px;
    height: 36px;
    object-fit: cover;
    border-radius: 0.15rem;
    filter: grayscale(30%) brightness(0.85);
}

.grav-marquee-item span {
    font-size: 1.2rem;
    color: var(--grav-muted);
    white-space: nowrap;
    letter-spacing: 0.04em;
}

.credentials-cta { display: flex; justify-content: flex-start; }

/* ========================================================
   SECTION 09 — CONTACT (#contact)
   ======================================================== */
#contact.grav-section {
    padding: 16rem 0 14rem;
    min-height: 100vh;
    display: flex;
    align-items: center;
}

.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 10rem;
    align-items: start;
}

.contact-statement {
    position: sticky;
    top: 22vh;
}

.contact-big-headline {
    font-size: clamp(4.5rem, 7vw, 8rem);
    font-weight: 900;
    color: var(--grav-pure);
    letter-spacing: -0.05em;
    line-height: 0.95;
    margin-bottom: 5rem;
}

.contact-channels {
    display: flex;
    flex-direction: column;
    gap: 0;
}

.contact-channel {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 2rem 0;
    border-top: 1px solid var(--grav-border);
    text-decoration: none;
    transition: all 0.3s var(--grav-ease-in);
}

.contact-channel:last-child { border-bottom: 1px solid var(--grav-border); }

.contact-channel:hover { padding-left: 0.8rem; }

.channel-info {
    display: flex;
    flex-direction: column;
    gap: 0.3rem;
}

.channel-label {
    font-size: 1.05rem;
    color: var(--grav-silver);
    letter-spacing: 0.2em;
    text-transform: uppercase;
    font-weight: 500;
}

.channel-value {
    font-size: 1.45rem;
    color: var(--grav-light);
    transition: color 0.3s ease;
}

.contact-channel:hover .channel-value { color: var(--grav-pure); }

.channel-arrow {
    font-size: 1.8rem;
    color: var(--grav-border-md);
    transition: all 0.3s ease;
}

.contact-channel:hover .channel-arrow {
    color: var(--grav-pure);
    transform: translate(3px, -3px);
}

.contact-form-grav {
    display: flex;
    flex-direction: column;
    gap: 0;
}

.contact-form-label {
    font-size: 1.05rem;
    color: var(--grav-silver);
    letter-spacing: 0.2em;
    text-transform: uppercase;
    margin-bottom: 3rem;
    display: flex;
    align-items: center;
    gap: 0.8rem;
}

.grav-form-group {
    border-top: 1px solid var(--grav-border);
    padding: 2rem 0;
    position: relative;
    transition: border-color 0.3s ease;
}

.grav-form-group:focus-within {
    border-top-color: var(--grav-border-md);
}

.grav-form-group:last-of-type {
    border-bottom: 1px solid var(--grav-border);
    margin-bottom: 3rem;
}

.grav-form-group:last-of-type:focus-within {
    border-bottom-color: var(--grav-border-md);
}

.grav-form-group label {
    font-size: 1.05rem;
    color: var(--grav-silver);
    letter-spacing: 0.12em;
    text-transform: uppercase;
    display: block;
    margin-bottom: 1rem;
}

.grav-form-group input,
.grav-form-group textarea {
    width: 100%;
    background: transparent;
    border: none;
    outline: none;
    font-size: 1.5rem;
    color: var(--grav-pure);
    font-family: inherit;
    caret-color: var(--grav-pure);
    padding: 0;
    resize: none;
}

.grav-form-group input::placeholder,
.grav-form-group textarea::placeholder { color: var(--grav-graphite); }

.grav-form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0 4rem;
}

.grav-form-row .grav-form-group {
    border-top: 1px solid var(--grav-border);
    border-right: none;
    border-left: none;
    border-bottom: none;
}

.grav-form-submit {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 2rem;
    margin-top: 1rem;
}

.contact-security {
    font-size: 1.1rem;
    color: var(--grav-silver);
    letter-spacing: 0.05em;
}

/* ========================================================
   FOOTER (Gravitational Update)
   ======================================================== */
.footer {
    background: var(--grav-void) !important;
    border-top: 1px solid var(--grav-border) !important;
    padding: 5rem 6% !important;
}

.footer-content {
    max-width: 1320px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 2rem;
    flex-wrap: wrap;
}

.footer-logo {
    font-size: 2rem !important;
    font-weight: 700 !important;
    color: var(--grav-white) !important;
    letter-spacing: -0.02em;
}

.footer-logo span { color: var(--grav-silver) !important; }
.footer-tagline { font-size: 1.2rem !important; color: var(--grav-silver) !important; }
.footer-copy { font-size: 1.1rem !important; color: var(--grav-graphite) !important; }

.footer-iconTop a {
    background: var(--grav-dark) !important;
    border: 1px solid var(--grav-border) !important;
    color: var(--grav-silver) !important;
}

.footer-iconTop a:hover {
    background: var(--grav-mid) !important;
    border-color: var(--grav-border-md) !important;
    color: var(--grav-pure) !important;
    transform: translateY(-3px);
}

/* ========================================================
   MODAL (Gravitational Restyle)
   ======================================================== */
.modal { background: rgba(3, 4, 7, 0.92) !important; backdrop-filter: blur(20px) !important; }
.modal-content {
    background: var(--grav-dark) !important;
    border: 1px solid var(--grav-border-md) !important;
    border-radius: 0.5rem !important;
    box-shadow: 0 40px 120px rgba(0, 0, 0, 0.9) !important;
}
.modal-header { border-bottom: 1px solid var(--grav-border) !important; background: transparent !important; }
.modal-close { color: var(--grav-silver) !important; border-color: var(--grav-border) !important; }
.modal-close:hover {
    color: var(--grav-pure) !important;
    border-color: var(--grav-border-md) !important;
    background: var(--grav-mid) !important;
}

/* ========================================================
   RESPONSIVE — MOBILE
   ======================================================== */
@media (max-width: 1200px) {
    .identity-grid { grid-template-columns: 1fr; gap: 7rem; }
    .identity-left {
        position: relative;
        top: auto;
        padding-right: 0;
        border-right: none;
        border-bottom: 1px solid var(--grav-border);
        padding-bottom: 5rem;
    }
    .identity-right { padding-left: 0; }

    .systems-blueprint { grid-template-columns: 1fr; }
    .systems-inspector { position: relative; top: auto; }

    .arsenal-layout { grid-template-columns: 1fr; }
    .arsenal-depth-field { position: relative; top: auto; }
    .arsenal-core-display { max-width: 320px; height: 320px; }

    .contact-grid { grid-template-columns: 1fr; gap: 6rem; }
    .contact-statement { position: relative; top: auto; }
}

@media (max-width: 768px) {
    #about.grav-section,
    #journey.grav-section,
    #architecture.grav-section,
    #skills.grav-section,
    #projects.grav-section,
    #terminal.grav-section,
    #achievements.grav-section,
    #certi.grav-section,
    #contact.grav-section { padding: 10rem 0 8rem; }

    .grav-section-num { font-size: 7rem; left: 4%; }

    .identity-field { grid-template-columns: 1fr; gap: 0.5rem; }
    .project-panel { grid-template-columns: 1fr; gap: 3rem; }
    .project-visual { height: 200px; }
    .project-index { display: none; }
    .archive-shelf { grid-template-columns: 1fr; }
    .credentials-stats { grid-template-columns: 1fr; }
    .credential-stat { border-right: none; border-bottom: 1px solid var(--grav-border); }
    .contact-big-headline { font-size: clamp(4rem, 10vw, 6rem); }
    .grav-form-row { grid-template-columns: 1fr; }
    .arsenal-core-display { display: none; }
    .projects-more { flex-direction: column; align-items: flex-start; }
}

@media (max-width: 480px) {
    .identity-stats { display: grid; grid-template-columns: 1fr 1fr; }
    .contact-big-headline { font-size: 3.8rem; }
    .archive-shelf { grid-template-columns: 1fr; }
}