/* ============================================================
   SCIUS — Know More
   Dark cinematic theme inspired by Pixelcarve
   ============================================================ */

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

:root {
    --color-bg: #0a0a0f;
    --color-bg-elevated: #12121a;
    --color-bg-card: #16161f;
    --color-surface: #1c1c28;
    --color-border: rgba(255, 255, 255, 0.06);
    --color-border-hover: rgba(255, 255, 255, 0.12);
    --color-text: #e8e8ed;
    --color-text-muted: #8888a0;
    --color-text-dim: #555570;
    --color-accent: #6c63ff;
    --color-accent-hover: #7d75ff;
    --color-accent-glow: rgba(108, 99, 255, 0.15);
    --color-accent-warm: #ff6b6b;

    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-serif: 'Playfair Display', Georgia, serif;
    --font-mono: 'JetBrains Mono', monospace;

    --container-width: 1200px;
    --container-narrow: 800px;
    --nav-height: 72px;

    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 8px 30px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 20px 60px rgba(0, 0, 0, 0.5);
    --shadow-glow: 0 0 40px var(--color-accent-glow);

    --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
    --ease-in-out: cubic-bezier(0.65, 0, 0.35, 1);
}

html {
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-sans);
    font-size: 16px;
    line-height: 1.6;
    color: var(--color-text);
    background: var(--color-bg);
    overflow-x: hidden;
}

a {
    color: inherit;
    text-decoration: none;
}

img {
    max-width: 100%;
    display: block;
}

/* --- Container --- */
.container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 40px;
}

/* --- Typography --- */
.section-tag {
    display: inline-block;
    font-family: var(--font-mono);
    font-size: 12px;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: var(--color-accent);
    margin-bottom: 24px;
}

.section-title {
    font-family: var(--font-serif);
    font-size: clamp(32px, 5vw, 56px);
    font-weight: 400;
    line-height: 1.15;
    color: var(--color-text);
    margin-bottom: 24px;
}

.section-title em {
    font-style: italic;
}

.section-subtitle {
    font-size: 18px;
    color: var(--color-text-muted);
    max-width: 520px;
    line-height: 1.7;
}

.section-subtitle-wide {
    max-width: 680px;
}

.text-accent {
    color: var(--color-accent);
}

/* --- Buttons --- */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 14px 32px;
    font-family: var(--font-sans);
    font-size: 14px;
    font-weight: 500;
    letter-spacing: 0.04em;
    border-radius: 4px;
    border: 1px solid transparent;
    cursor: pointer;
    transition: all 0.3s var(--ease-out);
    text-decoration: none;
}

.btn-primary {
    background: var(--color-accent);
    color: #fff;
    border-color: var(--color-accent);
}

.btn-primary:hover {
    background: var(--color-accent-hover);
    border-color: var(--color-accent-hover);
    box-shadow: var(--shadow-glow);
    transform: translateY(-1px);
}

.btn-outline {
    background: transparent;
    color: var(--color-text);
    border-color: var(--color-border-hover);
}

.btn-outline:hover {
    border-color: var(--color-text-muted);
    color: #fff;
}

.btn-full {
    width: 100%;
}

/* ============================================================
   Navigation
   ============================================================ */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    height: var(--nav-height);
    transition: all 0.4s var(--ease-out);
}

.nav.scrolled {
    background: rgba(10, 10, 15, 0.85);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--color-border);
}

.nav-inner {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 40px;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 12px;
    text-decoration: none;
}

.logo-mark {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    background: var(--color-accent);
    color: #fff;
    font-family: var(--font-serif);
    font-size: 18px;
    font-weight: 700;
    border-radius: 6px;
}

.logo-text {
    font-family: var(--font-sans);
    font-size: 18px;
    font-weight: 600;
    letter-spacing: 0.12em;
    color: var(--color-text);
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 36px;
}

.nav-links a {
    font-size: 13px;
    font-weight: 500;
    letter-spacing: 0.04em;
    color: var(--color-text-muted);
    transition: color 0.3s ease;
}

.nav-links a:hover {
    color: #fff;
}

.nav-cta {
    padding: 8px 20px;
    background: var(--color-accent);
    color: #fff !important;
    border-radius: 4px;
    font-size: 13px;
    transition: all 0.3s var(--ease-out) !important;
}

.nav-cta:hover {
    background: var(--color-accent-hover) !important;
    box-shadow: var(--shadow-glow);
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
}

.nav-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--color-text);
    transition: all 0.3s var(--ease-out);
}

.nav-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

.nav-toggle.active span:nth-child(2) {
    opacity: 0;
}

.nav-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
}

/* ============================================================
   Hero
   ============================================================ */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    inset: 0;
    background:
        radial-gradient(ellipse 80% 60% at 50% 40%, rgba(108, 99, 255, 0.08) 0%, transparent 60%),
        radial-gradient(ellipse 60% 80% at 20% 80%, rgba(108, 99, 255, 0.04) 0%, transparent 50%),
        var(--color-bg);
}

.hero-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(180deg, transparent 0%, rgba(10, 10, 15, 0.4) 100%);
}

.hero-particles {
    position: absolute;
    inset: 0;
    pointer-events: none;
}

.hero-particle {
    position: absolute;
    width: 2px;
    height: 2px;
    background: var(--color-accent);
    border-radius: 50%;
    opacity: 0;
    animation: particleFade 4s ease-in-out infinite;
}

@keyframes particleFade {
    0%, 100% { opacity: 0; transform: translateY(0); }
    50% { opacity: 0.6; transform: translateY(-20px); }
}

.hero-content {
    position: relative;
    z-index: 2;
    text-align: center;
    max-width: 800px;
    padding: 0 40px;
}

.hero-label {
    font-family: var(--font-mono);
    font-size: 12px;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: var(--color-text-muted);
    margin-bottom: 32px;
    opacity: 0;
    animation: fadeUp 0.8s var(--ease-out) 0.2s forwards;
}

.hero-title {
    font-family: var(--font-serif);
    font-weight: 400;
    margin-bottom: 32px;
}

.hero-title-line {
    display: block;
    font-size: clamp(56px, 10vw, 120px);
    line-height: 1.05;
    opacity: 0;
    animation: fadeUp 0.8s var(--ease-out) forwards;
}

.hero-title-line:nth-child(1) {
    animation-delay: 0.4s;
}

.hero-title-accent {
    color: var(--color-accent);
    font-style: italic;
    animation-delay: 0.6s !important;
}

.hero-subtitle {
    font-size: 18px;
    line-height: 1.8;
    color: var(--color-text-muted);
    max-width: 560px;
    margin: 0 auto 40px;
    opacity: 0;
    animation: fadeUp 0.8s var(--ease-out) 0.8s forwards;
}

.hero-actions {
    display: flex;
    gap: 16px;
    justify-content: center;
    opacity: 0;
    animation: fadeUp 0.8s var(--ease-out) 1s forwards;
}

.hero-scroll {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
    opacity: 0;
    animation: fadeUp 0.8s var(--ease-out) 1.4s forwards;
}

.hero-scroll span {
    font-family: var(--font-mono);
    font-size: 11px;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: var(--color-text-dim);
}

.hero-scroll-line {
    width: 1px;
    height: 40px;
    background: linear-gradient(to bottom, var(--color-accent), transparent);
    animation: scrollLine 2s ease-in-out infinite;
}

@keyframes scrollLine {
    0% { transform: scaleY(0); transform-origin: top; }
    50% { transform: scaleY(1); transform-origin: top; }
    50.01% { transform-origin: bottom; }
    100% { transform: scaleY(0); transform-origin: bottom; }
}

@keyframes fadeUp {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

/* ============================================================
   Sections
   ============================================================ */
.section {
    padding: 120px 0;
}

/* --- About --- */
.about-grid {
    display: grid;
    grid-template-columns: 200px 1fr;
    gap: 60px;
    margin-bottom: 80px;
}

.about-label {
    padding-top: 8px;
}

.about-text {
    font-size: 18px;
    line-height: 1.8;
    color: var(--color-text-muted);
    margin-bottom: 20px;
}

.about-text:last-child {
    margin-bottom: 0;
}

.about-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 40px;
    padding-top: 60px;
    border-top: 1px solid var(--color-border);
}

.stat {
    text-align: center;
}

.stat-number {
    display: block;
    font-family: var(--font-serif);
    font-size: clamp(40px, 5vw, 64px);
    font-weight: 400;
    color: var(--color-text);
    line-height: 1;
}

.stat-suffix {
    font-family: var(--font-serif);
    font-size: clamp(28px, 3vw, 40px);
    color: var(--color-accent);
}

.stat-label {
    display: block;
    font-family: var(--font-mono);
    font-size: 12px;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--color-text-dim);
    margin-top: 12px;
}

/* --- Pillars --- */
.section-pillars {
    background: var(--color-bg-elevated);
}

.pillars-header {
    margin-bottom: 60px;
}

.pillars-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
}

.pillar-card {
    display: block;
    position: relative;
    padding: 48px 40px;
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: 8px;
    transition: all 0.4s var(--ease-out);
    text-decoration: none;
    overflow: hidden;
}

.pillar-card:last-child:nth-child(odd) {
    grid-column: 1 / -1;
}

.pillar-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--color-accent);
    transform: scaleX(0);
    transition: transform 0.4s var(--ease-out);
}

.pillar-card:hover {
    border-color: var(--color-border-hover);
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.pillar-card:hover::before {
    transform: scaleX(1);
}

.pillar-icon {
    width: 48px;
    height: 48px;
    color: var(--color-accent);
    margin-bottom: 24px;
    transition: transform 0.4s var(--ease-out);
}

.pillar-card:hover .pillar-icon {
    transform: scale(1.1);
}

.pillar-number {
    font-family: var(--font-mono);
    font-size: 12px;
    color: var(--color-text-dim);
    letter-spacing: 0.1em;
    display: block;
    margin-bottom: 12px;
}

.pillar-title {
    font-family: var(--font-serif);
    font-size: 24px;
    font-weight: 400;
    margin-bottom: 16px;
    color: var(--color-text);
}

.pillar-desc {
    font-size: 15px;
    line-height: 1.7;
    color: var(--color-text-muted);
    margin-bottom: 24px;
}

.pillar-link {
    font-family: var(--font-mono);
    font-size: 13px;
    color: var(--color-accent);
    letter-spacing: 0.04em;
    transition: letter-spacing 0.3s var(--ease-out);
}

.pillar-card:hover .pillar-link {
    letter-spacing: 0.08em;
}

/* --- Insights --- */
.insights-header {
    margin-bottom: 60px;
}

.insights-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
}

.insight-card {
    padding: 40px;
    background: var(--color-bg-elevated);
    border: 1px solid var(--color-border);
    border-radius: 8px;
    transition: all 0.4s var(--ease-out);
    display: flex;
    flex-direction: column;
}

a.insight-card {
    text-decoration: none;
    color: inherit;
    cursor: pointer;
}

.insight-card:hover {
    border-color: var(--color-border-hover);
    transform: translateY(-2px);
}

.insight-card-featured {
    grid-column: 1 / -1;
    background:
        radial-gradient(ellipse at top right, var(--color-accent-glow), transparent 60%),
        var(--color-bg-elevated);
}

.insight-tag {
    display: inline-block;
    font-family: var(--font-mono);
    font-size: 11px;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--color-accent);
    padding: 4px 10px;
    border: 1px solid rgba(108, 99, 255, 0.3);
    border-radius: 3px;
    margin-bottom: 20px;
    width: fit-content;
}

.insight-title {
    font-family: var(--font-serif);
    font-size: 22px;
    font-weight: 400;
    line-height: 1.35;
    color: var(--color-text);
    margin-bottom: 16px;
}

.insight-card-featured .insight-title {
    font-size: 28px;
}

.insight-excerpt {
    font-size: 15px;
    line-height: 1.7;
    color: var(--color-text-muted);
    margin-bottom: 20px;
    flex: 1;
}

.insight-date {
    font-family: var(--font-mono);
    font-size: 12px;
    color: var(--color-text-dim);
    letter-spacing: 0.05em;
}

/* --- Quote --- */
.section-quote {
    padding: 100px 0;
    background: var(--color-bg-elevated);
    border-top: 1px solid var(--color-border);
    border-bottom: 1px solid var(--color-border);
}

.quote {
    text-align: center;
    max-width: 700px;
    margin: 0 auto;
}

.quote p {
    font-family: var(--font-serif);
    font-size: clamp(24px, 3.5vw, 36px);
    font-style: italic;
    font-weight: 400;
    line-height: 1.5;
    color: var(--color-text);
    margin-bottom: 24px;
}

.quote cite {
    font-family: var(--font-mono);
    font-size: 13px;
    font-style: normal;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--color-text-dim);
}

/* --- Subscribe --- */
.subscribe-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    align-items: center;
}

.subscribe-text {
    font-size: 18px;
    line-height: 1.8;
    color: var(--color-text-muted);
}

.subscribe-form {
    padding: 48px;
    background: var(--color-bg-elevated);
    border: 1px solid var(--color-border);
    border-radius: 8px;
}

.form-group {
    margin-bottom: 16px;
}

.form-group input {
    width: 100%;
    padding: 14px 16px;
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: 4px;
    color: var(--color-text);
    font-family: var(--font-sans);
    font-size: 15px;
    transition: border-color 0.3s ease;
}

.form-group input:focus {
    outline: none;
    border-color: var(--color-accent);
    box-shadow: 0 0 0 3px var(--color-accent-glow);
}

.form-group input::placeholder {
    color: var(--color-text-dim);
}

.form-note {
    font-size: 13px;
    color: var(--color-text-dim);
    text-align: center;
    margin-top: 12px;
}

.form-message {
    margin-top: 16px;
    text-align: center;
    font-size: 14px;
    min-height: 20px;
}

.form-message.success {
    color: #4ade80;
}

.form-message.error {
    color: var(--color-accent-warm);
}

/* --- Contact --- */
.section-contact {
    padding: 80px 0;
}

.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    align-items: center;
}

.contact-text {
    font-size: 16px;
    color: var(--color-text-muted);
    max-width: 480px;
    line-height: 1.7;
}

.contact-action {
    display: flex;
    justify-content: center;
}

/* --- Modal --- */
.modal-overlay {
    position: fixed;
    inset: 0;
    z-index: 2000;
    background: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s ease, visibility 0.3s ease;
}

.modal-overlay.open {
    opacity: 1;
    visibility: visible;
}

.modal {
    position: relative;
    width: 90%;
    max-width: 480px;
    background: var(--color-bg-elevated);
    border: 1px solid var(--color-border);
    border-radius: 12px;
    padding: 48px 40px;
    transform: translateY(20px) scale(0.97);
    transition: transform 0.3s var(--ease-out);
    box-shadow: var(--shadow-lg);
}

.modal-overlay.open .modal {
    transform: translateY(0) scale(1);
}

.modal-close {
    position: absolute;
    top: 16px;
    right: 20px;
    background: none;
    border: none;
    color: var(--color-text-dim);
    font-size: 28px;
    cursor: pointer;
    line-height: 1;
    padding: 4px;
    transition: color 0.2s ease;
}

.modal-close:hover {
    color: var(--color-text);
}

.modal-title {
    font-family: var(--font-serif);
    font-size: 28px;
    font-weight: 400;
    color: var(--color-text);
    margin-bottom: 8px;
}

.modal-subtitle {
    font-size: 15px;
    color: var(--color-text-muted);
    margin-bottom: 32px;
}

.modal-form textarea {
    width: 100%;
    padding: 14px 16px;
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: 4px;
    color: var(--color-text);
    font-family: var(--font-sans);
    font-size: 15px;
    resize: vertical;
    transition: border-color 0.3s ease;
}

.modal-form textarea:focus {
    outline: none;
    border-color: var(--color-accent);
    box-shadow: 0 0 0 3px var(--color-accent-glow);
}

.modal-form textarea::placeholder {
    color: var(--color-text-dim);
}

/* ============================================================
   Footer
   ============================================================ */
.footer {
    padding: 40px 0;
    border-top: 1px solid var(--color-border);
}

.footer-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.footer-brand {
    display: flex;
    align-items: center;
    gap: 10px;
}

.footer-brand .logo-mark {
    width: 28px;
    height: 28px;
    font-size: 14px;
}

.footer-name {
    font-size: 14px;
    font-weight: 600;
    letter-spacing: 0.12em;
    color: var(--color-text-muted);
}

.footer-copy {
    font-size: 13px;
    color: var(--color-text-dim);
}

.footer-links {
    display: flex;
    gap: 24px;
}

.footer-links a {
    font-size: 13px;
    color: var(--color-text-dim);
    transition: color 0.3s ease;
}

.footer-links a:hover {
    color: var(--color-text);
}

/* ============================================================
   Scroll Animations
   ============================================================ */
.fade-in {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s var(--ease-out), transform 0.6s var(--ease-out);
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

.fade-in-delay-1 { transition-delay: 0.1s; }
.fade-in-delay-2 { transition-delay: 0.2s; }
.fade-in-delay-3 { transition-delay: 0.3s; }
.fade-in-delay-4 { transition-delay: 0.4s; }

/* ============================================================
   Responsive
   ============================================================ */
@media (max-width: 1024px) {
    .container {
        padding: 0 32px;
    }

    .about-grid {
        grid-template-columns: 1fr;
        gap: 24px;
    }

    .pillars-grid {
        grid-template-columns: 1fr;
    }

    .subscribe-grid {
        grid-template-columns: 1fr;
        gap: 48px;
    }
}

@media (max-width: 768px) {
    .container {
        padding: 0 24px;
    }

    .section {
        padding: 80px 0;
    }

    .nav-inner {
        padding: 0 24px;
    }

    .nav-links {
        display: none;
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
        bottom: 0;
        background: rgba(10, 10, 15, 0.97);
        backdrop-filter: blur(20px);
        flex-direction: column;
        justify-content: center;
        align-items: center;
        gap: 32px;
        z-index: 999;
    }

    .nav-links.open {
        display: flex;
    }

    .nav-links a {
        font-size: 24px;
        color: var(--color-text);
    }

    .nav-cta {
        font-size: 18px !important;
        padding: 12px 28px !important;
    }

    .nav-toggle {
        display: flex;
        z-index: 1001;
    }

    .hero-actions {
        flex-direction: column;
        align-items: center;
    }

    .about-stats {
        grid-template-columns: repeat(3, 1fr);
        gap: 24px;
    }

    .insights-grid {
        grid-template-columns: 1fr;
    }

    .contact-grid {
        grid-template-columns: 1fr;
        gap: 32px;
        text-align: center;
    }

    .contact-text {
        max-width: 100%;
    }

    .footer-inner {
        flex-direction: column;
        gap: 16px;
        text-align: center;
    }

    .subscribe-form {
        padding: 32px 24px;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 20px;
    }

    .section {
        padding: 64px 0;
    }

    .about-stats {
        grid-template-columns: 1fr;
        gap: 32px;
    }

    .pillar-card {
        padding: 32px 24px;
    }

    .insight-card {
        padding: 28px 24px;
    }
}