/* ==========================================================================
   scire.dev — Styles
   Cinematic developer notebook | Broken-grid | Muted vintage
   ========================================================================== */

/* --- CSS Custom Properties --- */
:root {
    --notebook-warm: #E8DFD8;
    --ink-faded: #5A5048;
    --coffee-stain: #A88B70;
    --watercolor-blue: #7B9EB0;
    --highlight-yellow: #E8D090;
    --deep-charcoal: #3A3430;
    --page-cream: #F5F0E8;
    --terminal-bg: #4A443E;

    --font-headline: 'Epilogue', sans-serif;
    --font-body: 'Source Serif 4', Georgia, serif;
    --font-code: 'Fira Code', monospace;
}

/* --- Reset & Base --- */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    background: var(--notebook-warm);
    color: var(--ink-faded);
    font-family: var(--font-body);
    font-weight: 400;
    font-size: clamp(16px, 1.5vw, 18px);
    line-height: 1.8;
    overflow-x: hidden;
}

/* Hidden SVG filters */
.svg-filters {
    position: absolute;
    width: 0;
    height: 0;
    overflow: hidden;
}

/* --- Watercolor Wash Accents --- */
.watercolor-wash {
    position: absolute;
    pointer-events: none;
    border-radius: 50%;
    opacity: 0;
    transition: opacity 0.6s ease;
}

.watercolor-wash.visible {
    opacity: 1;
}

.wash-blue {
    width: 500px;
    height: 500px;
    top: -100px;
    right: -80px;
    background: radial-gradient(ellipse at center, rgba(123, 158, 176, 0.18) 0%, rgba(123, 158, 176, 0.06) 50%, transparent 70%);
    filter: url(#watercolor-filter);
}

.wash-amber {
    width: 400px;
    height: 400px;
    bottom: 60px;
    left: -60px;
    background: radial-gradient(ellipse at center, rgba(168, 139, 112, 0.2) 0%, rgba(168, 139, 112, 0.06) 50%, transparent 70%);
    filter: url(#watercolor-filter);
}

.wash-blue-subtle {
    width: 600px;
    height: 600px;
    top: 10%;
    left: -150px;
    background: radial-gradient(ellipse at center, rgba(123, 158, 176, 0.12) 0%, rgba(123, 158, 176, 0.03) 50%, transparent 70%);
    filter: url(#watercolor-soft);
}

.wash-amber-subtle {
    width: 500px;
    height: 500px;
    top: 5%;
    right: -100px;
    background: radial-gradient(ellipse at center, rgba(168, 139, 112, 0.15) 0%, rgba(168, 139, 112, 0.04) 50%, transparent 70%);
    filter: url(#watercolor-soft);
}

.wash-footer {
    width: 700px;
    height: 300px;
    top: -80px;
    left: 50%;
    transform: translateX(-50%);
    background: radial-gradient(ellipse at center, rgba(123, 158, 176, 0.1) 0%, transparent 60%);
    filter: url(#watercolor-soft);
}

/* ==========================================================================
   Section 1: The Notebook (Hero)
   ========================================================================== */
.notebook-section {
    position: relative;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    background: var(--notebook-warm);
    overflow: hidden;
}

/* Bracket Decorations */
.bracket-decor {
    position: absolute;
    width: 60px;
    height: 200px;
    opacity: 0;
    transition: opacity 0.6s ease;
}

.bracket-decor.visible {
    opacity: 1;
}

.bracket-left {
    left: 8%;
    top: 50%;
    transform: translateY(-50%);
}

.bracket-right {
    right: 8%;
    top: 50%;
    transform: translateY(-50%);
}

.bracket-path {
    stroke-dasharray: 400;
    stroke-dashoffset: 400;
    transition: stroke-dashoffset 1.2s ease;
}

.bracket-decor.visible .bracket-path {
    stroke-dashoffset: 0;
}

/* Wordmark */
.notebook-content {
    text-align: center;
    z-index: 2;
    opacity: 0;
    transform: translateY(10px);
    transition: opacity 0.5s ease, transform 0.5s ease;
}

.notebook-content.visible {
    opacity: 1;
    transform: translateY(0);
}

.wordmark {
    font-family: var(--font-headline);
    font-size: clamp(48px, 8vw, 96px);
    font-weight: 400;
    letter-spacing: -0.02em;
    color: var(--deep-charcoal);
    margin-bottom: 16px;
    display: inline-block;
}

.letter {
    display: inline-block;
    font-weight: 400;
    transition: font-weight 0.3s ease;
}

.letter.dot {
    color: var(--coffee-stain);
}

.tagline {
    font-family: var(--font-body);
    font-size: clamp(14px, 1.5vw, 18px);
    color: var(--ink-faded);
    font-weight: 400;
    letter-spacing: 0.02em;
    max-width: 500px;
    margin: 0 auto;
}

.tagline em {
    color: var(--coffee-stain);
    font-style: italic;
}

/* Preview Cards */
.preview-cards {
    position: absolute;
    bottom: -20px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 24px;
    z-index: 3;
}

.preview-card {
    background: var(--page-cream);
    padding: 16px 24px;
    border-radius: 2px;
    box-shadow: 0 4px 20px rgba(58, 52, 48, 0.08);
    opacity: 0;
    transform: translateY(40px);
    transition: opacity 0.5s ease, transform 0.5s ease;
}

.preview-card.visible {
    opacity: 1;
    transform: translateY(0);
}

.card-peek-1 {
    transform: translateY(40px) rotate(-1deg);
    transition-delay: 0.1s;
}

.card-peek-1.visible {
    transform: translateY(0) rotate(-1deg);
}

.card-peek-2 {
    transform: translateY(50px) rotate(0.5deg);
    transition-delay: 0.2s;
}

.card-peek-2.visible {
    transform: translateY(-10px) rotate(0.5deg);
}

.card-peek-3 {
    transform: translateY(40px) rotate(1deg);
    transition-delay: 0.3s;
}

.card-peek-3.visible {
    transform: translateY(0) rotate(1deg);
}

.code-decor {
    font-family: var(--font-code);
    color: var(--watercolor-blue);
    font-size: 14px;
    margin-right: 8px;
    opacity: 0.6;
}

.preview-text {
    font-family: var(--font-body);
    font-size: 14px;
    color: var(--ink-faded);
}

/* ==========================================================================
   Section 2: Knowledge Fragments (Broken Grid)
   ========================================================================== */
.fragments-section {
    position: relative;
    padding: 120px 40px 100px;
    overflow: hidden;
}

.broken-grid {
    display: grid;
    grid-template-columns: repeat(12, 1fr);
    gap: 16px;
    max-width: 1200px;
    margin: 0 auto;
    position: relative;
}

.fragment {
    background: var(--page-cream);
    border-radius: 2px;
    box-shadow: 0 2px 16px rgba(58, 52, 48, 0.06);
    position: relative;
    opacity: 0;
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.fragment.visible {
    opacity: 1;
}

.fragment-inner {
    padding: 40px 36px;
    position: relative;
}

/* Broken grid positioning */
.block-1 {
    grid-column: 1 / 8;
    grid-row: 1;
    transform: rotate(-1deg);
    z-index: 1;
}

.block-1.visible {
    transform: rotate(-1deg);
}

.block-2 {
    grid-column: 6 / 13;
    grid-row: 1;
    margin-top: 40px;
    transform: rotate(1.5deg);
    z-index: 2;
}

.block-2.visible {
    transform: rotate(1.5deg);
}

.block-3 {
    grid-column: 2 / 9;
    grid-row: 2;
    margin-top: -30px;
    transform: rotate(-0.5deg);
    z-index: 1;
}

.block-3.visible {
    transform: rotate(-0.5deg);
}

.block-4 {
    grid-column: 7 / 13;
    grid-row: 2;
    margin-top: 20px;
    transform: rotate(2deg);
    z-index: 2;
}

.block-4.visible {
    transform: rotate(2deg);
}

/* Corner decorations */
.corner-decor {
    position: absolute;
    width: 30px;
    height: 30px;
}

.corner-decor.top-left {
    top: 8px;
    left: 8px;
}

.corner-decor.top-right {
    top: 8px;
    right: 8px;
}

.corner-decor.bottom-right {
    bottom: 8px;
    right: 8px;
}

.corner-decor.bottom-left {
    bottom: 8px;
    left: 8px;
}

.fragment-title {
    font-family: var(--font-headline);
    font-size: clamp(28px, 3vw, 42px);
    font-weight: 700;
    color: var(--deep-charcoal);
    letter-spacing: -0.02em;
    margin-bottom: 16px;
}

.fragment-body {
    font-family: var(--font-body);
    color: var(--ink-faded);
    margin-bottom: 20px;
    max-width: 480px;
}

.fragment-code {
    display: block;
    font-family: var(--font-code);
    font-size: 14px;
    color: var(--watercolor-blue);
    background: rgba(123, 158, 176, 0.08);
    padding: 10px 16px;
    border-radius: 2px;
    border-left: 2px solid var(--watercolor-blue);
}

/* Grid decorative elements */
.grid-decor {
    position: absolute;
    font-family: var(--font-code);
    color: var(--ink-faded);
    opacity: 0.12;
    pointer-events: none;
    z-index: 3;
}

.semicolon-1 {
    font-size: 80px;
    top: 30%;
    left: 52%;
}

.semicolon-2 {
    font-size: 60px;
    bottom: 15%;
    right: 15%;
}

.angle-bracket-1 {
    font-size: 36px;
    top: 10%;
    right: 8%;
}

/* ==========================================================================
   Section 3: The Stack
   ========================================================================== */
.stack-section {
    position: relative;
    padding: 100px 40px 140px;
    overflow: hidden;
}

.stack-header {
    text-align: center;
    max-width: 600px;
    margin: 0 auto 80px;
}

.stack-title {
    font-family: var(--font-headline);
    font-size: clamp(32px, 5vw, 56px);
    font-weight: 700;
    color: var(--deep-charcoal);
    letter-spacing: -0.02em;
    margin-bottom: 12px;
}

.stack-subtitle {
    font-family: var(--font-body);
    color: var(--ink-faded);
    font-size: clamp(16px, 1.5vw, 18px);
}

.stack-container {
    position: relative;
    max-width: 700px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 0;
}

.stack-card {
    background: var(--page-cream);
    border-radius: 2px;
    box-shadow: 0 4px 24px rgba(58, 52, 48, 0.08);
    position: relative;
    margin-top: -24px;
    opacity: 0;
    transition: opacity 0.5s ease, transform 0.5s ease;
}

.stack-card:first-child {
    margin-top: 0;
}

.stack-card.visible {
    opacity: 1;
}

.card-depth-1 {
    z-index: 5;
    transform: rotate(-2deg);
}

.card-depth-1.visible {
    transform: rotate(-2deg);
}

.card-depth-2 {
    z-index: 4;
    transform: rotate(1.5deg);
}

.card-depth-2.visible {
    transform: rotate(1.5deg);
}

.card-depth-3 {
    z-index: 3;
    transform: rotate(-1deg);
}

.card-depth-3.visible {
    transform: rotate(-1deg);
}

.card-depth-4 {
    z-index: 2;
    transform: rotate(0.5deg);
}

.card-depth-4.visible {
    transform: rotate(0.5deg);
}

.card-depth-5 {
    z-index: 1;
    transform: rotate(-0.5deg);
}

.card-depth-5.visible {
    transform: rotate(-0.5deg);
}

.stack-card-inner {
    padding: 36px 40px;
    position: relative;
}

.stack-number {
    font-family: var(--font-headline);
    font-size: 64px;
    font-weight: 800;
    color: var(--coffee-stain);
    opacity: 0.12;
    position: absolute;
    top: 12px;
    right: 24px;
    line-height: 1;
}

.stack-card h3 {
    font-family: var(--font-headline);
    font-size: clamp(22px, 2.5vw, 32px);
    font-weight: 600;
    color: var(--deep-charcoal);
    letter-spacing: -0.02em;
    margin-bottom: 10px;
}

.stack-card p {
    font-family: var(--font-body);
    color: var(--ink-faded);
    margin-bottom: 16px;
    max-width: 520px;
}

.stack-code-line {
    font-family: var(--font-code);
    font-size: 14px;
    background: rgba(123, 158, 176, 0.06);
    padding: 8px 14px;
    border-radius: 2px;
    display: inline-block;
}

.code-keyword {
    color: var(--watercolor-blue);
}

.code-var {
    color: var(--coffee-stain);
}

.code-string {
    color: var(--highlight-yellow);
}

.code-comment {
    color: var(--ink-faded);
    opacity: 0.5;
    font-style: italic;
}

/* ==========================================================================
   Section 4: Terminal Footer
   ========================================================================== */
.terminal-section {
    position: relative;
    background: var(--terminal-bg);
    padding: 80px 40px;
    overflow: hidden;
}

.footer-bracket-left,
.footer-bracket-right {
    position: absolute;
    width: 40px;
    height: 120px;
    opacity: 0;
    transition: opacity 0.6s ease;
}

.footer-bracket-left.visible,
.footer-bracket-right.visible {
    opacity: 1;
}

.footer-bracket-left {
    left: 10%;
    top: 50%;
    transform: translateY(-50%);
}

.footer-bracket-right {
    right: 10%;
    top: 50%;
    transform: translateY(-50%);
}

.footer-bracket-left .bracket-path,
.footer-bracket-right .bracket-path {
    stroke-dasharray: 300;
    stroke-dashoffset: 300;
    transition: stroke-dashoffset 1s ease;
}

.footer-bracket-left.visible .bracket-path,
.footer-bracket-right.visible .bracket-path {
    stroke-dashoffset: 0;
}

.terminal-content {
    max-width: 600px;
    margin: 0 auto;
    text-align: center;
}

.terminal-prompt {
    font-family: var(--font-code);
    font-size: 14px;
    color: var(--watercolor-blue);
    margin-bottom: 20px;
    opacity: 0.8;
}

.prompt-symbol {
    color: var(--coffee-stain);
    margin-right: 8px;
}

.terminal-output {
    font-family: var(--font-body);
    font-size: clamp(16px, 1.5vw, 20px);
    color: var(--notebook-warm);
    line-height: 1.8;
    margin-bottom: 20px;
    opacity: 0.9;
}

.terminal-output code {
    font-family: var(--font-code);
    color: var(--highlight-yellow);
    font-size: 0.9em;
}

.terminal-cursor {
    display: inline-block;
    width: 10px;
    height: 2px;
    background: var(--watercolor-blue);
    animation: blink 1s step-end infinite;
}

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

.footer-meta {
    text-align: center;
    margin-top: 48px;
    font-family: var(--font-code);
    font-size: 12px;
    color: var(--notebook-warm);
    opacity: 0.4;
}

.footer-separator {
    margin: 0 12px;
}

/* ==========================================================================
   Shake-Error Animation
   ========================================================================== */
@keyframes shake {
    0%, 100% { transform: translateX(0); }
    25% { transform: translateX(-2px); }
    75% { transform: translateX(2px); }
}

.shake-active {
    animation: shake 0.3s ease;
}

/* ==========================================================================
   Wordmark Weight Animation
   ========================================================================== */
@keyframes weight-cycle {
    0% { font-weight: 400; }
    50% { font-weight: 700; }
    100% { font-weight: 400; }
}

.letter.animate-weight {
    animation: weight-cycle 2s ease infinite;
    animation-delay: calc(var(--i) * 0.15s);
}

/* ==========================================================================
   Responsive
   ========================================================================== */
@media (max-width: 900px) {
    .broken-grid {
        grid-template-columns: 1fr;
        gap: 24px;
    }

    .block-1, .block-2, .block-3, .block-4 {
        grid-column: 1 / -1;
        grid-row: auto;
        margin-top: 0;
    }

    .preview-cards {
        flex-direction: column;
        align-items: center;
        gap: 12px;
        bottom: -10px;
    }

    .bracket-left, .bracket-right {
        display: none;
    }

    .fragments-section {
        padding: 80px 20px 60px;
    }

    .stack-section {
        padding: 60px 20px 100px;
    }

    .terminal-section {
        padding: 60px 20px;
    }

    .footer-bracket-left,
    .footer-bracket-right {
        display: none;
    }

    .semicolon-1, .semicolon-2, .angle-bracket-1 {
        display: none;
    }
}

@media (max-width: 600px) {
    .wordmark {
        font-size: clamp(36px, 12vw, 56px);
    }

    .fragment-inner {
        padding: 24px 20px;
    }

    .stack-card-inner {
        padding: 24px 20px;
    }

    .stack-number {
        font-size: 40px;
    }
}