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

:root {
    --bg: #0a0a0f;
    --bg-alt: #12121a;
    --green: #00ff41;
    --green-dim: #00cc33;
    --gold: #f5c842;
    --blue: #42a5f5;
    --white: #e0e0e0;
    --card-bg: rgba(15, 15, 25, 0.85);
    --card-border: rgba(0, 255, 65, 0.15);
    --text: #e0e0e0;
    --text-muted: #999;
    --text-dim: #666;
}

/* ─── Light Theme ──────────────────────────────────────── */
[data-theme="light"] {
    --bg: #f0f0f5;
    --bg-alt: #e8e8ee;
    --green: #008f24;
    --green-dim: #006f1c;
    --gold: #c99a00;
    --blue: #1976d2;
    --white: #1a1a2e;
    --card-bg: rgba(255, 255, 255, 0.92);
    --card-border: rgba(0, 143, 36, 0.2);
    --text: #1a1a2e;
    --text-muted: #555;
    --text-dim: #888;
}

[data-theme="light"] body {
    color: var(--text);
}

[data-theme="light"] #piMatrix {
    opacity: 0.08;
}

[data-theme="light"] .fact-card p,
[data-theme="light"] .legend-card p,
[data-theme="light"] .formula-desc,
[data-theme="light"] .timeline-content p,
[data-theme="light"] .tool-card p {
    color: var(--text-muted);
}

[data-theme="light"] .legend-card blockquote {
    color: var(--text-dim);
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Courier New', 'Fira Code', 'Consolas', monospace;
    background: var(--bg);
    color: var(--white);
    overflow-x: hidden;
    line-height: 1.6;
}

/* ─── Matrix Canvas ────────────────────────────────────── */
#piMatrix {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
    opacity: 0.25;
}

/* ─── Confetti Canvas ──────────────────────────────────── */
#confettiCanvas {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 999;
    pointer-events: none;
}

/* ─── Content Overlay ──────────────────────────────────── */
.content {
    position: relative;
    z-index: 1;
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

/* ─── Navbar ───────────────────────────────────────────── */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 100;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.6rem 2rem;
    background: rgba(10, 10, 15, 0.9);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--card-border);
    transition: transform 0.3s ease;
}

[data-theme="light"] .navbar {
    background: rgba(240, 240, 245, 0.92);
}

.nav-brand {
    font-size: 1.8rem;
    color: var(--green);
    font-weight: bold;
}

.nav-links {
    display: flex;
    gap: 1.5rem;
}

.nav-links a {
    color: var(--text-muted);
    text-decoration: none;
    font-size: 0.85rem;
    letter-spacing: 0.05em;
    transition: color 0.2s;
}

.nav-links a:hover {
    color: var(--green);
}

.nav-menu-btn {
    display: none;
    background: none;
    border: none;
    color: var(--green);
    font-size: 1.5rem;
    cursor: pointer;
}

/* ─── Theme Toggle ─────────────────────────────────────── */
.theme-toggle {
    position: fixed;
    bottom: 5rem;
    right: 1.5rem;
    z-index: 100;
    width: 48px;
    height: 48px;
    border-radius: 50%;
    border: 1px solid var(--card-border);
    background: var(--card-bg);
    font-size: 1.3rem;
    cursor: pointer;
    transition: transform 0.3s, background 0.3s;
    display: flex;
    align-items: center;
    justify-content: center;
}

.theme-toggle:hover {
    transform: scale(1.1);
    border-color: var(--green);
}

/* ─── Scroll-to-Top Button ─────────────────────────────── */
.scroll-top {
    position: fixed;
    bottom: 1.5rem;
    right: 1.5rem;
    z-index: 100;
    width: 48px;
    height: 48px;
    border-radius: 50%;
    border: 1px solid var(--card-border);
    background: var(--card-bg);
    color: var(--green);
    font-size: 1.3rem;
    cursor: pointer;
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.3s, transform 0.3s;
    pointer-events: none;
}

.scroll-top.visible {
    opacity: 1;
    transform: translateY(0);
    pointer-events: auto;
}

.scroll-top:hover {
    border-color: var(--green);
    background: rgba(0, 255, 65, 0.1);
}

/* ─── Hero ─────────────────────────────────────────────── */
.hero {
    text-align: center;
    padding: 7rem 1rem 3rem;
}

.pi-symbol {
    font-size: 8rem;
    color: var(--green);
    text-shadow: 0 0 40px rgba(0, 255, 65, 0.5), 0 0 80px rgba(0, 255, 65, 0.2);
    animation: pulse 3s ease-in-out infinite;
    line-height: 1;
}

@keyframes pulse {
    0%, 100% { transform: scale(1); opacity: 1; }
    50% { transform: scale(1.08); opacity: 0.85; }
}

.hero h1 {
    font-size: 3rem;
    letter-spacing: 0.3em;
    text-transform: uppercase;
    color: var(--green);
    margin: 0.5rem 0;
}

.date-badge {
    display: inline-block;
    background: rgba(0, 255, 65, 0.1);
    border: 1px solid var(--card-border);
    border-radius: 2rem;
    padding: 0.5rem 2rem;
    font-size: 1.1rem;
    color: var(--green-dim);
    margin-top: 1rem;
}

.hero-stats {
    display: flex;
    justify-content: center;
    gap: 2rem;
    margin-top: 1.5rem;
    flex-wrap: wrap;
}

.hero-stat {
    font-size: 0.85rem;
    color: var(--text-muted);
    padding: 0.3rem 1rem;
    border: 1px solid var(--card-border);
    border-radius: 1rem;
    background: var(--card-bg);
}

.hero-stat strong {
    color: var(--green);
}

/* ─── Pi Progress Bar ──────────────────────────────────── */
.pi-progress-section {
    padding: 0.5rem 0 1.5rem;
}

.pi-progress-label {
    display: flex;
    justify-content: space-between;
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-bottom: 0.5rem;
}

.pi-progress-bar {
    height: 6px;
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: 3px;
    overflow: hidden;
}

.pi-progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--green), var(--gold));
    border-radius: 3px;
    width: 0%;
    transition: width 1s ease-out;
}

/* ─── Countdown ────────────────────────────────────────── */
.countdown-section {
    text-align: center;
    padding: 3rem 0;
}

.countdown-section h2 {
    font-size: 1.5rem;
    color: var(--green);
    margin-bottom: 2rem;
    letter-spacing: 0.1em;
}

.countdown {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.time-block {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: 12px;
    padding: 1.5rem 1.2rem;
    min-width: 100px;
    text-align: center;
}

.time-value {
    display: block;
    font-size: 2.8rem;
    font-weight: bold;
    color: var(--green);
    text-shadow: 0 0 20px rgba(0, 255, 65, 0.4);
}

.time-label {
    display: block;
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.15em;
    color: #888;
    margin-top: 0.3rem;
}

.time-separator {
    font-size: 2.5rem;
    color: var(--green-dim);
    padding: 0 0.2rem;
}

.celebration {
    padding: 2rem;
}

.celebration-text {
    font-size: 2.5rem;
    color: var(--gold);
    text-shadow: 0 0 30px rgba(245, 200, 66, 0.5);
    animation: pulse 2s ease-in-out infinite;
}

.celebration-sub {
    color: var(--green);
    font-size: 1rem;
    margin-top: 0.5rem;
}

.hidden {
    display: none;
}

/* ─── Today's Digit ────────────────────────────────────── */
.today-digit-section {
    padding: 1rem 0 2rem;
    text-align: center;
}

.today-digit-card {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: 14px;
    padding: 2rem;
    display: inline-block;
    min-width: 320px;
}

.today-digit-card h3 {
    color: var(--green);
    margin-bottom: 0.5rem;
    font-size: 1.2rem;
}

.today-digit-info {
    font-size: 0.85rem;
    color: var(--text-muted);
}

.today-digit-value {
    font-size: 5rem;
    font-weight: bold;
    color: var(--gold);
    text-shadow: 0 0 30px rgba(245, 200, 66, 0.4);
    line-height: 1.2;
    margin-top: 0.5rem;
}

/* ─── Pi Marquee ───────────────────────────────────────── */
.pi-marquee {
    overflow: hidden;
    white-space: nowrap;
    background: rgba(0, 255, 65, 0.05);
    border-top: 1px solid var(--card-border);
    border-bottom: 1px solid var(--card-border);
    padding: 0.8rem 0;
    margin: 2rem 0;
}

.pi-marquee-inner {
    display: inline-block;
    animation: marquee 60s linear infinite;
    font-size: 1rem;
    color: var(--green-dim);
    letter-spacing: 0.15em;
}

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

/* ─── Facts ────────────────────────────────────────────── */
.facts-section {
    padding: 4rem 0;
}

.facts-section h2 {
    text-align: center;
    font-size: 2rem;
    color: var(--green);
    margin-bottom: 2.5rem;
}

.facts-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1.5rem;
}

.fact-card {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: 12px;
    padding: 2rem;
    transition: transform 0.3s ease, border-color 0.3s ease;
}

.fact-card:hover {
    transform: translateY(-4px);
    border-color: var(--green-dim);
}

.fact-icon {
    font-size: 2rem;
    margin-bottom: 0.8rem;
}

.fact-card h3 {
    color: var(--green);
    font-size: 1.1rem;
    margin-bottom: 0.6rem;
}

.fact-card p {
    font-size: 0.9rem;
    color: #bbb;
    line-height: 1.7;
}

/* ─── Formulas ─────────────────────────────────────────── */
.formulas-section {
    padding: 4rem 0;
}

.formulas-section h2 {
    text-align: center;
    font-size: 2rem;
    color: var(--green);
    margin-bottom: 2.5rem;
}

.formulas-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1.5rem;
}

.formula-card {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: 12px;
    padding: 1.8rem;
    text-align: center;
    transition: transform 0.3s ease, border-color 0.3s ease;
}

.formula-card:hover {
    transform: translateY(-4px);
    border-color: var(--green-dim);
}

.formula-name {
    font-size: 0.85rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: 0.8rem;
}

.formula-expr {
    font-size: 1.5rem;
    color: var(--gold);
    font-weight: bold;
    margin-bottom: 0.8rem;
    line-height: 1.4;
}

.formula-desc {
    font-size: 0.85rem;
    color: #bbb;
    line-height: 1.5;
}

/* ─── Approximations Table ─────────────────────────────── */
.approx-section {
    padding: 4rem 0;
}

.approx-section h2 {
    text-align: center;
    font-size: 2rem;
    color: var(--green);
    margin-bottom: 2.5rem;
}

.approx-table-wrap {
    overflow-x: auto;
}

.approx-table {
    width: 100%;
    border-collapse: collapse;
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: 12px;
    overflow: hidden;
}

.approx-table th,
.approx-table td {
    padding: 0.9rem 1.2rem;
    text-align: left;
    font-size: 0.9rem;
    border-bottom: 1px solid var(--card-border);
}

.approx-table th {
    color: var(--green);
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    background: rgba(0, 255, 65, 0.05);
}

.approx-table td {
    color: var(--text-muted);
}

.approx-table tr:last-child td {
    border-bottom: none;
    color: var(--gold);
    font-weight: bold;
}

/* ─── Bases Section ────────────────────────────────────── */
.bases-section {
    padding: 4rem 0;
}

.bases-section h2 {
    text-align: center;
    font-size: 2rem;
    color: var(--green);
    margin-bottom: 2.5rem;
}

.bases-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.2rem;
}

.base-card {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: 12px;
    padding: 1.5rem;
    transition: transform 0.3s ease, border-color 0.3s ease;
}

.base-card:hover {
    transform: translateY(-3px);
    border-color: var(--green-dim);
}

.base-name {
    font-size: 0.8rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: 0.5rem;
}

.base-value {
    font-size: 1.15rem;
    color: var(--green);
    word-break: break-all;
}

/* ─── Legends ──────────────────────────────────────────── */
.legends-section {
    padding: 4rem 0;
}

.legends-section h2 {
    text-align: center;
    font-size: 2rem;
    color: var(--gold);
    margin-bottom: 1rem;
}

.legends-intro {
    text-align: center;
    color: #999;
    max-width: 650px;
    margin: 0 auto 2.5rem;
    font-size: 0.95rem;
}

.legends-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 2rem;
}

.legend-card {
    background: var(--card-bg);
    border-radius: 14px;
    padding: 2.5rem 2rem;
    border: 1px solid transparent;
    transition: transform 0.3s ease, border-color 0.3s ease;
}

.legend-card:hover {
    transform: translateY(-4px);
}

.legend-card.einstein {
    border-color: rgba(245, 200, 66, 0.2);
}

.legend-card.einstein:hover {
    border-color: var(--gold);
}

.legend-card.hawking {
    border-color: rgba(66, 165, 245, 0.2);
}

.legend-card.hawking:hover {
    border-color: var(--blue);
}

.legend-emoji {
    font-size: 2.5rem;
    margin-bottom: 0.5rem;
}

.legend-card h3 {
    font-size: 1.5rem;
    margin-bottom: 0.3rem;
}

.einstein h3 { color: var(--gold); }
.hawking h3 { color: var(--blue); }

.legend-date {
    font-size: 0.85rem;
    color: #888;
    margin-bottom: 0.4rem;
}

.legend-age {
    font-size: 0.9rem;
    font-weight: bold;
    margin-bottom: 1rem;
    padding: 0.3rem 0.8rem;
    display: inline-block;
    border-radius: 1rem;
}

.einstein .legend-age {
    color: var(--gold);
    background: rgba(245, 200, 66, 0.1);
}

.hawking .legend-age {
    color: var(--blue);
    background: rgba(66, 165, 245, 0.1);
}

.legend-card p {
    font-size: 0.9rem;
    color: #bbb;
    line-height: 1.7;
}

.legend-card blockquote {
    margin-top: 1.2rem;
    padding-left: 1rem;
    border-left: 3px solid;
    font-style: italic;
    color: #999;
    font-size: 0.85rem;
}

.einstein blockquote { border-color: var(--gold); }
.hawking blockquote { border-color: var(--blue); }

.formula {
    color: var(--gold);
    font-weight: bold;
}

/* ─── Timeline ─────────────────────────────────────────── */
.timeline-section {
    padding: 4rem 0;
}

.timeline-section h2 {
    text-align: center;
    font-size: 2rem;
    color: var(--green);
    margin-bottom: 2.5rem;
}

.timeline {
    position: relative;
    max-width: 700px;
    margin: 0 auto;
    padding-left: 2rem;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 2px;
    background: var(--card-border);
}

.timeline-item {
    position: relative;
    margin-bottom: 2.5rem;
    padding-left: 1.5rem;
}

.timeline-item::before {
    content: '';
    position: absolute;
    left: -2.05rem;
    top: 0.3rem;
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: var(--green);
    border: 2px solid var(--bg);
}

.timeline-year {
    font-size: 1.1rem;
    font-weight: bold;
    color: var(--green);
    margin-bottom: 0.3rem;
}

.timeline-content h3 {
    font-size: 1rem;
    color: var(--gold);
    margin-bottom: 0.3rem;
}

.timeline-content p {
    font-size: 0.85rem;
    color: var(--text-muted);
    line-height: 1.6;
}

/* ─── Tools Section ────────────────────────────────────── */
.tools-section {
    padding: 4rem 0;
}

.tools-section h2 {
    text-align: center;
    font-size: 2rem;
    color: var(--green);
    margin-bottom: 2.5rem;
}

.tools-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1.5rem;
}

.tool-card {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: 12px;
    padding: 2rem;
}

.tool-card h3 {
    color: var(--green);
    margin-bottom: 0.5rem;
    font-size: 1.1rem;
}

.tool-card p {
    font-size: 0.85rem;
    color: #bbb;
    line-height: 1.5;
    margin-bottom: 1rem;
}

.tool-input-group {
    display: flex;
    gap: 0.5rem;
    margin-bottom: 0.8rem;
}

.tool-input-group input {
    flex: 1;
    background: rgba(0, 0, 0, 0.3);
    border: 1px solid var(--card-border);
    border-radius: 8px;
    padding: 0.6rem 1rem;
    color: var(--green);
    font-family: inherit;
    font-size: 0.9rem;
    outline: none;
    transition: border-color 0.2s;
}

[data-theme="light"] .tool-input-group input {
    background: rgba(0, 0, 0, 0.05);
    color: var(--text);
}

.tool-input-group input:focus {
    border-color: var(--green);
}

.tool-btn {
    background: rgba(0, 255, 65, 0.1);
    border: 1px solid var(--green-dim);
    border-radius: 8px;
    padding: 0.6rem 1.2rem;
    color: var(--green);
    font-family: inherit;
    font-size: 0.85rem;
    cursor: pointer;
    transition: background 0.2s;
    white-space: nowrap;
}

.tool-btn:hover {
    background: rgba(0, 255, 65, 0.2);
}

.tool-result {
    font-size: 0.85rem;
    color: var(--gold);
    min-height: 1.2rem;
    line-height: 1.5;
}

.memory-display {
    background: rgba(0, 0, 0, 0.3);
    border: 1px solid var(--card-border);
    border-radius: 8px;
    padding: 0.8rem 1rem;
    font-size: 1.2rem;
    color: var(--green);
    margin-bottom: 0.8rem;
    word-break: break-all;
    min-height: 2.5rem;
}

[data-theme="light"] .memory-display {
    background: rgba(0, 0, 0, 0.05);
}

#memoryInput {
    width: 100%;
    background: rgba(0, 0, 0, 0.3);
    border: 1px solid var(--card-border);
    border-radius: 8px;
    padding: 0.6rem 1rem;
    color: var(--green);
    font-family: inherit;
    font-size: 0.9rem;
    outline: none;
    margin-bottom: 0.8rem;
    transition: border-color 0.2s;
}

[data-theme="light"] #memoryInput {
    background: rgba(0, 0, 0, 0.05);
    color: var(--text);
}

#memoryInput:focus {
    border-color: var(--green);
}

/* ─── Digits Display ───────────────────────────────────── */
.digits-section {
    padding: 4rem 0;
    text-align: center;
}

.digits-section h2 {
    font-size: 2rem;
    color: var(--green);
    margin-bottom: 1rem;
}

.copy-btn {
    display: inline-block;
    background: rgba(0, 255, 65, 0.1);
    border: 1px solid var(--card-border);
    border-radius: 8px;
    padding: 0.5rem 1.5rem;
    color: var(--green);
    font-family: inherit;
    font-size: 0.85rem;
    cursor: pointer;
    margin-bottom: 1.5rem;
    transition: background 0.2s, border-color 0.2s;
}

.copy-btn:hover {
    background: rgba(0, 255, 65, 0.2);
    border-color: var(--green-dim);
}

.digits-display {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: 12px;
    padding: 2rem;
    font-size: 1.1rem;
    line-height: 2;
    letter-spacing: 0.15em;
    word-break: break-all;
    text-align: center;
    color: var(--green-dim);
}

.digits-display .digit-dot {
    color: var(--gold);
    font-weight: bold;
    font-size: 1.3rem;
}

.digits-display .digit-3 {
    color: var(--green);
    font-weight: bold;
    font-size: 1.4rem;
}

.digits-display .digit-highlight {
    color: var(--green);
}

/* ─── Calendar Section ─────────────────────────────────── */
.calendar-section {
    padding: 3rem 0;
    text-align: center;
}

.calendar-section h2 {
    font-size: 1.8rem;
    color: var(--green);
    margin-bottom: 0.5rem;
}

.calendar-intro {
    color: var(--text-muted);
    font-size: 0.9rem;
    margin-bottom: 1.5rem;
}

.calendar-buttons {
    display: flex;
    justify-content: center;
    gap: 1rem;
    flex-wrap: wrap;
}

.cal-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.8rem 1.8rem;
    border-radius: 10px;
    font-family: inherit;
    font-size: 0.95rem;
    cursor: pointer;
    transition: transform 0.2s, background 0.2s;
    text-decoration: none;
    border: 1px solid var(--card-border);
}

.cal-btn:hover {
    transform: translateY(-2px);
}

.google-cal {
    background: rgba(66, 133, 244, 0.1);
    color: var(--blue);
    border-color: rgba(66, 133, 244, 0.3);
}

.google-cal:hover {
    background: rgba(66, 133, 244, 0.2);
}

.ical-btn {
    background: rgba(0, 255, 65, 0.1);
    color: var(--green);
    border-color: rgba(0, 255, 65, 0.2);
}

.ical-btn:hover {
    background: rgba(0, 255, 65, 0.2);
}

.cal-icon {
    font-size: 1.1rem;
}

/* ─── Share Section ────────────────────────────────────── */
.share-section {
    padding: 3rem 0;
    text-align: center;
}

.share-section h2 {
    font-size: 1.8rem;
    color: var(--green);
    margin-bottom: 0.5rem;
}

.share-intro {
    color: var(--text-muted);
    font-size: 0.9rem;
    margin-bottom: 1.5rem;
}

.share-buttons {
    display: flex;
    justify-content: center;
    gap: 0.8rem;
    flex-wrap: wrap;
}

.share-btn {
    padding: 0.6rem 1.5rem;
    border-radius: 8px;
    font-family: inherit;
    font-size: 0.85rem;
    cursor: pointer;
    border: 1px solid var(--card-border);
    background: var(--card-bg);
    transition: transform 0.2s, background 0.2s;
}

.share-btn:hover {
    transform: translateY(-2px);
}

.share-btn.twitter {
    color: #1da1f2;
    border-color: rgba(29, 161, 242, 0.3);
}

.share-btn.twitter:hover { background: rgba(29, 161, 242, 0.15); }

.share-btn.whatsapp {
    color: #25d366;
    border-color: rgba(37, 211, 102, 0.3);
}

.share-btn.whatsapp:hover { background: rgba(37, 211, 102, 0.15); }

.share-btn.facebook {
    color: #4267b2;
    border-color: rgba(66, 103, 178, 0.3);
}

.share-btn.facebook:hover { background: rgba(66, 103, 178, 0.15); }

.share-btn.linkedin {
    color: #0a66c2;
    border-color: rgba(10, 102, 194, 0.3);
}

.share-btn.linkedin:hover { background: rgba(10, 102, 194, 0.15); }

.share-btn.copylink {
    color: var(--green);
    border-color: var(--card-border);
}

.share-btn.copylink:hover { background: rgba(0, 255, 65, 0.15); }

/* ─── Footer ───────────────────────────────────────────── */
footer {
    text-align: center;
    padding: 3rem 0 4rem;
    border-top: 1px solid var(--card-border);
    margin-top: 2rem;
}

footer p {
    color: var(--green-dim);
    font-size: 0.9rem;
}

.footer-sub {
    margin-top: 0.5rem;
    color: #666 !important;
    font-size: 0.8rem !important;
}

.visit-counter {
    margin-top: 0.8rem;
    font-size: 0.75rem !important;
    color: var(--text-dim) !important;
}

.footer-hint {
    margin-top: 0.8rem;
    font-size: 0.7rem !important;
    color: var(--text-dim) !important;
    opacity: 0.6;
}

/* ─── Konami Easter Egg ────────────────────────────────── */
.konami-active .pi-symbol {
    animation: konamiSpin 1s linear infinite !important;
}

@keyframes konamiSpin {
    from { transform: rotate(0deg) scale(1.2); }
    to { transform: rotate(360deg) scale(1.2); }
}

.konami-toast {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background: var(--card-bg);
    border: 2px solid var(--gold);
    border-radius: 16px;
    padding: 2rem 3rem;
    z-index: 1000;
    text-align: center;
    animation: toastIn 0.5s ease;
}

@keyframes toastIn {
    from { opacity: 0; transform: translate(-50%, -50%) scale(0.5); }
    to { opacity: 1; transform: translate(-50%, -50%) scale(1); }
}

.konami-toast h2 {
    color: var(--gold);
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
}

.konami-toast p {
    color: var(--text-muted);
    font-size: 0.9rem;
}

/* ─── Print Styles ─────────────────────────────────────── */
@media print {
    #piMatrix, #confettiCanvas, .theme-toggle, .scroll-top,
    .navbar, .pi-marquee, .share-section, .calendar-section,
    .tools-section, .pi-progress-section, .today-digit-section,
    .footer-hint { display: none !important; }

    body { background: white; color: black; }
    .content { max-width: 100%; }
    .hero { padding-top: 2rem; }
    .pi-symbol { color: #333; text-shadow: none; animation: none; }
    .hero h1, .facts-section h2, .legends-section h2,
    .digits-section h2, .formulas-section h2, .approx-section h2,
    .bases-section h2, .timeline-section h2 { color: #333; }

    .fact-card, .legend-card, .formula-card, .base-card,
    .approx-table, .digits-display {
        background: white;
        border-color: #ccc;
        color: #333;
    }

    .fact-card p, .legend-card p, .formula-desc,
    .timeline-content p { color: #555; }
    .legend-card blockquote { color: #777; }
    .fact-card h3 { color: #006f1c; }
    .digits-display { color: #333; font-size: 0.85rem; }
}

/* ─── Responsive ───────────────────────────────────────── */
@media (max-width: 768px) {
    .pi-symbol { font-size: 5rem; }
    .hero h1 { font-size: 2rem; letter-spacing: 0.2em; }
    .hero { padding-top: 5rem; }
    .time-block { min-width: 70px; padding: 1rem; }
    .time-value { font-size: 2rem; }
    .time-separator { font-size: 1.8rem; }
    .celebration-text { font-size: 1.8rem; }
    .facts-grid { grid-template-columns: 1fr; }
    .legends-grid { grid-template-columns: 1fr; }
    .formulas-grid { grid-template-columns: 1fr; }
    .bases-grid { grid-template-columns: 1fr; }
    .tools-grid { grid-template-columns: 1fr; }
    .today-digit-card { min-width: auto; width: 100%; }
    .nav-links { display: none; }
    .nav-links.open {
        display: flex;
        flex-direction: column;
        position: absolute;
        top: 100%;
        left: 0;
        width: 100%;
        background: rgba(10, 10, 15, 0.95);
        padding: 1rem 2rem;
        gap: 1rem;
        border-bottom: 1px solid var(--card-border);
    }
    [data-theme="light"] .nav-links.open {
        background: rgba(240, 240, 245, 0.98);
    }
    .nav-menu-btn { display: block; }
}

@media (max-width: 480px) {
    .pi-symbol { font-size: 4rem; }
    .hero h1 { font-size: 1.5rem; }
    .time-block { min-width: 60px; padding: 0.8rem; }
    .time-value { font-size: 1.5rem; }
    .hero-stats { gap: 0.8rem; }
    .hero-stat { font-size: 0.75rem; padding: 0.2rem 0.6rem; }
    .calendar-buttons, .share-buttons { flex-direction: column; align-items: center; }
}