/* ============================================================
   NASKAH AGRARIA — Mobile-First Styles
   FlowArt Engine + Artistik Loader
   ============================================================ */

:root {
    --parchment: #f4ecd8;
    --parchment-dark: #e8dcc4;
    --parchment-light: #f0e6d0;
    --ink-black: #2b2b2b;
    --ink-faded: #4a3f2e;
    --ochre: #8b6914;
    --slate-blue: #5a6e7c;
    --sepia-muted: #6b5f4d;
    --border-warm: #d4c5a9;
    --accent-gold: #c9a84c;
    --ease-out: cubic-bezier(0.25, 0.46, 0.45, 0.94);
    --ease-power: cubic-bezier(0.65, 0, 0.35, 1);
}

*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: auto;
    -webkit-text-size-adjust: 100%;
    text-size-adjust: 100%;
}

body {
    font-family: 'EB Garamond', 'Plus Jakarta Sans', Georgia, serif;
    background-color: var(--parchment-dark);
    color: var(--ink-black);
    line-height: 1.6;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    -webkit-tap-highlight-color: transparent;
}

::selection {
    background-color: var(--ochre);
    color: var(--parchment);
}

/* ---- Parchment Background ---- */
.parchment-bg {
    background-image: 
        url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='0.08'/%3E%3C/svg%3E"),
        linear-gradient(180deg, rgba(212,197,169,0.3) 0%, rgba(244,236,216,0.1) 50%, rgba(212,197,169,0.3) 100%);
    background-size: 200px 200px, 100% 100%;
}

/* ---- Noise & Vignette ---- */
.noise-overlay {
    position: fixed;
    inset: 0;
    pointer-events: none;
    z-index: 9000;
    opacity: 0.03;
    background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.65' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
    background-size: 180px 180px;
    mix-blend-mode: multiply;
}

.vignette {
    position: fixed;
    inset: 0;
    pointer-events: none;
    z-index: 8999;
    background: radial-gradient(ellipse at center, transparent 55%, rgba(43,43,43,0.12) 100%);
}

/* ============================================================
   LOADER — Artistik & Smooth
   ============================================================ */
#loader {
    transition: opacity 0.8s var(--ease-power), visibility 0.8s;
}

#loader.hidden {
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
}

/* Ink splatter decorations */
.ink-splatter {
    opacity: 0;
    transform: scale(0.5);
    transition: opacity 0.6s ease, transform 0.6s var(--ease-out);
}

#loader.animate-splatter .ink-splatter {
    opacity: 1;
    transform: scale(1);
}

#loader.animate-splatter .ink-splatter:nth-child(1) { transition-delay: 0.2s; }
#loader.animate-splatter .ink-splatter:nth-child(2) { transition-delay: 0.5s; }

/* Pen & Ink Line */
#loader-svg .ink-line {
    stroke-dasharray: 300;
    stroke-dashoffset: 300;
}

#loader-svg.animate .ink-line {
    animation: drawInk 2s var(--ease-power) forwards;
}

#loader-svg.animate #pen-nib {
    animation: movePen 2s var(--ease-power) forwards;
}

/* Ink drops falling */
.ink-drop {
    transform-origin: center;
}

#loader-svg.animate .ink-drop {
    animation: inkDropFall 0.5s ease-out forwards;
}

#loader-svg.animate #ink-drop-1 { animation-delay: 0.6s; }
#loader-svg.animate #ink-drop-2 { animation-delay: 1.0s; }
#loader-svg.animate #ink-drop-3 { animation-delay: 1.4s; }

/* Flourishes */
#loader-svg.animate #flourish-left,
#loader-svg.animate #flourish-right {
    animation: flourishIn 0.5s ease-out 1.8s forwards;
}

/* Paper fold reveal */
#paper-fold {
    transition: transform 1s var(--ease-power);
    transform-origin: bottom;
}

#loader.paper-reveal #paper-fold {
    transform: scaleY(0);
}

/* Loading text cursor blink */
#loader-cursor {
    animation: cursorBlink 0.8s ease-in-out infinite;
}

@keyframes drawInk {
    to { stroke-dashoffset: 0; }
}

@keyframes movePen {
    0% { transform: translate(20px, 20px); }
    100% { transform: translate(170px, 20px); }
}

@keyframes inkDropFall {
    0% { opacity: 0; transform: translateY(0) scale(0.5); }
    30% { opacity: 0.8; transform: translateY(8px) scale(1); }
    100% { opacity: 0; transform: translateY(25px) scale(0.3); }
}

@keyframes flourishIn {
    from { opacity: 0; transform: scale(0.8); }
    to { opacity: 0.5; transform: scale(1); }
}

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

/* Loader decorative lines */
.loader-line, .loader-dot {
    opacity: 0;
    transform: scaleX(0);
    transition: opacity 0.5s ease, transform 0.5s var(--ease-out);
}

#loader.show-lines .loader-line,
#loader.show-lines .loader-dot {
    opacity: 1;
    transform: scaleX(1);
}

/* ============================================================
   FLOWART — Mobile & Desktop
   ============================================================ */
.flow-section {
    position: relative;
    width: 100%;
    will-change: transform;
    backface-visibility: hidden;
}

/* Mobile: subtle rotation stacking */
@media (max-width: 1023px) {
    .flow-section {
        /* Sections stack naturally, no min-height forcing */
        min-height: auto;
    }

    /* Hero is the only one that needs viewport height */
    #hero {
        min-height: 100dvh;
    }
}

/* ============================================================
   CROSS-SECTION (Mobile CSS 3D)
   ============================================================ */
.cross-section-mobile {
    perspective: 800px;
    padding-top: 4rem;
}

.cross-section-container {
    transform-style: preserve-3d;
    animation: floatSection 6s ease-in-out infinite;
}

@keyframes floatSection {
    0%, 100% { transform: translateY(0) rotateX(5deg); }
    50% { transform: translateY(-8px) rotateX(5deg); }
}

.layer {
    position: absolute;
    left: 0;
    right: 0;
    display: flex;
    align-items: center;
}

.layer-inner {
    flex: 1;
    height: 100%;
    border-radius: 4px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.1);
}

.layer-air .layer-inner {
    background: linear-gradient(180deg, rgba(200,220,240,0.3) 0%, rgba(180,200,220,0.15) 100%);
    border: 1px dashed rgba(90,110,124,0.3);
}

.layer-surface .layer-inner {
    background: linear-gradient(180deg, #8b7355 0%, #6b5f4d 100%);
}

.layer-shallow .layer-inner {
    background: linear-gradient(180deg, #6b5f4d 0%, #5a4f3f 100%);
}

.layer-deep .layer-inner {
    background: linear-gradient(180deg, #4a3f2e 0%, #2b2b2b 100%);
}

.layer-tag {
    position: absolute;
    right: -6px;
    font-family: 'Playfair Display', serif;
    font-size: 0.6rem;
    color: var(--sepia-muted);
    text-align: right;
    line-height: 1.3;
    background: rgba(244,236,216,0.92);
    padding: 2px 6px;
    border-radius: 3px;
    white-space: nowrap;
    box-shadow: 0 1px 3px rgba(0,0,0,0.1);
}

.layer-tag small {
    font-size: 0.5rem;
    opacity: 0.7;
}

.layer-air { top: 0; height: 28%; z-index: 4; }
.layer-surface { top: 28%; height: 12%; z-index: 3; }
.layer-shallow { top: 40%; height: 28%; z-index: 2; }
.layer-deep { top: 68%; height: 32%; z-index: 1; }

/* ============================================================
   NAVIGATION
   ============================================================ */
#mobile-nav {
    transition: transform 0.3s var(--ease-out);
}

#mobile-nav .nav-link {
    transition: color 0.2s ease;
    padding: 4px 8px;
    border-radius: 8px;
}

#mobile-nav .nav-link.active {
    color: var(--ink-black);
    background: rgba(139,105,20,0.08);
}

#mobile-nav .nav-link.active svg {
    stroke-width: 2.5;
}

#desktop-nav {
    transition: opacity 0.5s ease, transform 0.5s ease;
}

#desktop-nav.visible {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
}

.nav-link.active .nav-underline {
    width: 100% !important;
}

/* ============================================================
   PROGRESS DOTS
   ============================================================ */
.progress-dot {
    cursor: pointer;
    border: none;
    background: none;
    padding: 4px;
    margin: -4px;
}

.progress-dot::after {
    content: '';
    display: block;
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: var(--border-warm);
    transition: all 0.4s var(--ease-out);
}

.progress-dot.active::after {
    background: var(--ink-black);
    transform: scale(1.4);
}

.progress-dot:hover::after {
    background: var(--ochre);
}

/* ============================================================
   REVEAL ANIMATIONS
   ============================================================ */
.reveal-item {
    opacity: 0;
    transform: translateY(25px);
}

.reveal-item.revealed {
    opacity: 1;
    transform: translateY(0);
    transition: opacity 0.7s var(--ease-out), transform 0.7s var(--ease-out);
}

.hero-anim {
    opacity: 0;
    transform: translateY(20px);
}

/* ============================================================
   CARDS & INTERACTIVE
   ============================================================ */
.definition-card {
    transition: transform 0.35s var(--ease-out), box-shadow 0.35s var(--ease-out);
    position: relative;
    overflow: hidden;
}

.definition-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(139,105,20,0.03), transparent);
    transition: left 0.6s ease;
}

.definition-card:hover::before {
    left: 100%;
}

.definition-card:hover {
    transform: translateY(-3px);
    box-shadow: 0 16px 32px rgba(43,43,43,0.06), 0 0 0 1px rgba(139,105,20,0.08);
}

.type-card {
    transition: transform 0.35s var(--ease-out), box-shadow 0.35s var(--ease-out);
}

.type-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 20px 40px rgba(43,43,43,0.08);
}

.rbt-card {
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    cursor: pointer;
}

.rbt-card:hover {
    transform: scale(1.01);
    box-shadow: 0 12px 24px rgba(43,43,43,0.08);
}

.rbt-card:hover .rbt-magnifier-icon {
    opacity: 1;
}

.rbt-card:active {
    transform: scale(0.995);
}

.rbt-expand-btn {
    touch-action: manipulation;
}

.process-card {
    transition: transform 0.3s var(--ease-out);
}

.process-card:hover {
    transform: translateY(-3px);
}

.legal-card {
    transition: all 0.3s var(--ease-out);
    position: relative;
    overflow: hidden;
}

.legal-card::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 2px;
    background: var(--ochre);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.4s var(--ease-out);
}

.legal-card:hover::after {
    transform: scaleX(1);
}

/* ============================================================
   DETAIL PANEL
   ============================================================ */
#detail-panel {
    transition: opacity 0.3s ease;
}

#detail-panel.open {
    display: flex;
}

.detail-panel-inner {
    animation: slideUpMobile 0.35s var(--ease-out);
}

@keyframes slideUpMobile {
    from { transform: translateY(100%); }
    to { transform: translateY(0); }
}

@media (min-width: 768px) {
    .detail-panel-inner {
        animation: slideInRight 0.35s var(--ease-out);
    }
    @keyframes slideInRight {
        from { transform: translateX(100%); }
        to { transform: translateX(0); }
    }
}

/* ============================================================
   IMAGES & MEDIA
   ============================================================ */
.sepia-image img {
    filter: sepia(0.35) contrast(0.95) brightness(0.95);
    transition: filter 0.5s var(--ease-out);
}

.sepia-image:hover img {
    filter: sepia(0.15) contrast(1) brightness(1);
}

img {
    opacity: 0;
    transition: opacity 0.5s ease;
}

img.loaded,
img[src]:not([src=""]) {
    opacity: 1;
}

/* ============================================================
   SCROLLBAR
   ============================================================ */
::-webkit-scrollbar {
    width: 5px;
}

::-webkit-scrollbar-track {
    background: var(--parchment-dark);
}

::-webkit-scrollbar-thumb {
    background: var(--border-warm);
    border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--ochre);
}

/* ============================================================
   THREE.JS CANVAS
   ============================================================ */
#three-canvas-container {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
}

#three-canvas-container canvas {
    display: block;
    width: 100%;
    height: 100%;
}

/* ============================================================
   DEPTH LABELS (Desktop)
   ============================================================ */
.depth-label {
    transition: opacity 0.5s ease, transform 0.5s ease, color 0.5s ease;
    font-size: 0.65rem;
    letter-spacing: 0.15em;
}

.depth-label.active {
    opacity: 1 !important;
    transform: translateX(6px);
    color: var(--ink-black);
}

/* ============================================================
   TOUCH OPTIMIZATION
   ============================================================ */
button, a, .rbt-card, .definition-card, .type-card, .process-card, .legal-card {
    touch-action: manipulation;
    -webkit-tap-highlight-color: transparent;
}

/* ============================================================
   REDUCED MOTION
   ============================================================ */
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }

    #loader-svg .ink-line,
    #loader-svg #pen-nib,
    #loader-svg .ink-drop,
    #loader-svg #flourish-left,
    #loader-svg #flourish-right {
        animation: none !important;
        stroke-dashoffset: 0 !important;
        opacity: 1 !important;
        transform: none !important;
    }

    #loader {
        transition: none;
        opacity: 0;
        visibility: hidden;
    }

    .cross-section-container {
        animation: none;
    }

    .reveal-item {
        opacity: 1;
        transform: none;
    }

    .hero-anim {
        opacity: 1;
        transform: none;
    }

    .detail-panel-inner {
        animation: none !important;
    }

    .ink-splatter {
        opacity: 1 !important;
        transform: none !important;
    }
}

/* ============================================================
   PRINT
   ============================================================ */
@media print {
    .noise-overlay, .vignette, #mobile-nav, #desktop-nav, .progress-dot, #loader, 
    #three-canvas-container, .cross-section-mobile {
        display: none !important;
    }

    .flow-section {
        min-height: auto !important;
        page-break-inside: avoid;
    }

    body {
        background: white !important;
    }

    .reveal-item, .hero-anim {
        opacity: 1 !important;
        transform: none !important;
    }
}

/* ============================================================
   RESPONSIVE BREAKPOINTS
   ============================================================ */

@media (min-width: 640px) {
    .layer-tag {
        font-size: 0.7rem;
        right: -2px;
    }
    .layer-tag small {
        font-size: 0.55rem;
    }
}

@media (min-width: 768px) {
    .reveal-item {
        transform: translateY(35px);
    }
    .hero-anim {
        transform: translateY(25px);
    }
    .definition-card:hover {
        transform: translateY(-4px);
    }
    .type-card:hover {
        transform: translateY(-5px);
    }
}

@media (min-width: 1024px) {
    .depth-label {
        font-size: 0.7rem;
    }
    .layer-tag {
        font-size: 0.75rem;
    }
}