/* ================================================================
   Peleus Promotional Website — style.css
   ================================================================ */

/* ── Custom Properties ─────────────────────────────────────────── */
:root {
    --primary: #667eea;
    --primary-dark: #5a6fd6;
    --gradient-end: #764ba2;
    --text: #1a1a2e;
    --text-light: #555;
    --text-muted: #888;
    --bg: #ffffff;
    --bg-alt: #f8f9ff;
    --bg-dark: #1a1a2e;
    --white: #ffffff;
    --border: #e8e8f0;
    --shadow: 0 4px 24px rgba(102, 126, 234, 0.12);
    --shadow-lg: 0 12px 48px rgba(102, 126, 234, 0.18);
    --radius: 12px;
    --radius-sm: 8px;
    --transition: 0.3s ease;
    --nav-height: 72px;
}

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

html {
    scroll-behavior: smooth;
    scroll-padding-top: var(--nav-height);
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    color: var(--text);
    background: var(--bg);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

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

a {
    color: var(--primary);
    text-decoration: none;
    transition: color var(--transition);
}

a:hover {
    color: var(--primary-dark);
}

.container {
    max-width: 1120px;
    margin: 0 auto;
    padding: 0 24px;
}

/* ── Navigation ────────────────────────────────────────────────── */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--nav-height);
    z-index: 1000;
    transition: background var(--transition), box-shadow var(--transition);
}

.nav.scrolled {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(12px);
    box-shadow: 0 1px 12px rgba(0, 0, 0, 0.08);
}

.nav-container {
    max-width: 1120px;
    margin: 0 auto;
    padding: 0 24px;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-logo-img {
    height: 36px;
    width: auto;
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 32px;
}

.nav-links a {
    color: var(--white);
    font-weight: 500;
    font-size: 0.95rem;
    transition: opacity var(--transition);
}

.nav-links a:hover {
    opacity: 0.8;
    color: var(--white);
}

.nav.scrolled .nav-links a {
    color: var(--text);
}

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

/* Mobile nav toggle */
.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 4px;
}

.nav-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--white);
    border-radius: 2px;
    transition: transform var(--transition), opacity var(--transition);
}

.nav.scrolled .nav-toggle span {
    background: var(--text);
}

.nav-toggle.open span:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
}

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

.nav-toggle.open span:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
}

/* ── Hero ──────────────────────────────────────────────────────── */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--primary), var(--gradient-end));
    overflow: hidden;
    padding: 120px 24px 80px;
}

.hero::before {
    content: '';
    position: absolute;
    inset: 0;
    background:
        radial-gradient(ellipse at 20% 50%, rgba(255, 255, 255, 0.1) 0%, transparent 50%),
        radial-gradient(ellipse at 80% 20%, rgba(255, 255, 255, 0.08) 0%, transparent 40%);
    pointer-events: none;
}

.hero-content {
    position: relative;
    text-align: center;
    max-width: 700px;
}

.hero-logo {
    height: 80px;
    width: auto;
    margin: 0 auto 32px;
    filter: brightness(0) invert(1);
}

.hero-title {
    font-size: clamp(2rem, 5vw, 3.2rem);
    font-weight: 700;
    color: var(--white);
    line-height: 1.2;
    margin-bottom: 20px;
    letter-spacing: -0.02em;
}

.hero-subtitle {
    font-size: clamp(1rem, 2.5vw, 1.15rem);
    color: rgba(255, 255, 255, 0.85);
    line-height: 1.7;
    margin-bottom: 40px;
    font-weight: 300;
}

.hero-actions {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
}

.hero-fade {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 80px;
    background: linear-gradient(to bottom, transparent, var(--bg));
    pointer-events: none;
}

/* ── Buttons ───────────────────────────────────────────────────── */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 14px 32px;
    font-family: inherit;
    font-size: 0.95rem;
    font-weight: 600;
    border-radius: var(--radius-sm);
    border: 2px solid transparent;
    cursor: pointer;
    transition: all var(--transition);
    text-decoration: none;
}

.btn-primary {
    background: var(--white);
    color: var(--primary);
    border-color: var(--white);
}

.btn-primary:hover {
    background: transparent;
    color: var(--white);
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.15);
}

.btn-outline {
    background: transparent;
    color: var(--white);
    border-color: rgba(255, 255, 255, 0.4);
}

.btn-outline:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: var(--white);
    color: var(--white);
    transform: translateY(-2px);
}

.btn-large {
    padding: 18px 48px;
    font-size: 1.05rem;
}

/* ── Section Titles ────────────────────────────────────────────── */
.section-title {
    font-size: clamp(1.6rem, 4vw, 2.2rem);
    font-weight: 700;
    text-align: center;
    margin-bottom: 12px;
    letter-spacing: -0.02em;
}

.section-subtitle {
    text-align: center;
    color: var(--text-light);
    font-size: 1.05rem;
    max-width: 560px;
    margin: 0 auto 56px;
    line-height: 1.7;
}

/* ── Features ──────────────────────────────────────────────────── */
.features {
    padding: 100px 0;
    background: var(--bg);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 28px;
}

.feature-card {
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 36px 28px;
    transition: transform var(--transition), box-shadow var(--transition);
    /* Scroll reveal */
    opacity: 0;
    transform: translateY(24px);
    transition: opacity 0.5s ease, transform 0.5s ease, box-shadow var(--transition);
}

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

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

.feature-icon {
    font-size: 2.4rem;
    margin-bottom: 16px;
    line-height: 1;
}

.feature-card h3 {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 10px;
    color: var(--text);
}

.feature-card p {
    font-size: 0.92rem;
    color: var(--text-light);
    line-height: 1.65;
}

/* ── Screenshots ───────────────────────────────────────────────── */
.screenshots {
    padding: 100px 0;
    background: var(--bg-alt);
}

.laptop-frame {
    max-width: 900px;
    margin: 0 auto;
    /* Scroll reveal */
    opacity: 0;
    transform: translateY(24px);
    transition: opacity 0.5s ease, transform 0.5s ease;
}

.laptop-frame.visible {
    opacity: 1;
    transform: translateY(0);
}

.laptop-screen {
    background: #1a1a2e;
    border-radius: 12px 12px 0 0;
    padding: 12px 12px 0;
    box-shadow: var(--shadow-lg);
}

.laptop-screen img {
    width: 100%;
    height: auto;
    display: block;
    border-radius: 6px 6px 0 0;
}

.laptop-base {
    height: 18px;
    background: linear-gradient(to bottom, #d1d5db, #e5e7eb);
    border-radius: 0 0 8px 8px;
    position: relative;
    margin: 0 -4px;
}

.laptop-base::before {
    content: '';
    position: absolute;
    top: 4px;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 4px;
    background: #c0c4cc;
    border-radius: 4px;
}

/* ── Download ──────────────────────────────────────────────────── */
.download {
    padding: 100px 0;
    background: var(--bg);
}

.download-card {
    max-width: 560px;
    margin: 0 auto;
    background: linear-gradient(135deg, var(--primary), var(--gradient-end));
    border-radius: var(--radius);
    padding: 48px 40px;
    text-align: center;
    color: var(--white);
    /* Scroll reveal */
    opacity: 0;
    transform: translateY(24px);
    transition: opacity 0.5s ease, transform 0.5s ease;
}

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

.download-card h3 {
    font-size: 1.4rem;
    font-weight: 700;
    margin-bottom: 16px;
}

.system-reqs {
    list-style: none;
    display: flex;
    gap: 24px;
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: 28px;
    font-size: 0.9rem;
    color: rgba(255, 255, 255, 0.8);
}

.system-reqs li::before {
    content: '\2713';
    margin-right: 6px;
    font-weight: 700;
}

.download-card .btn-primary {
    margin-bottom: 16px;
}

.download-card .btn-primary:hover {
    background: var(--white);
    color: var(--primary);
    border-color: var(--white);
}

.download-note {
    font-size: 0.85rem;
    color: rgba(255, 255, 255, 0.7);
    font-style: italic;
}

/* ── Footer ────────────────────────────────────────────────────── */
.footer {
    background: var(--bg-dark);
    color: rgba(255, 255, 255, 0.7);
    padding-top: 64px;
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: 48px;
    padding-bottom: 48px;
}

.footer-logo {
    height: 32px;
    width: auto;
    margin-bottom: 12px;
    filter: brightness(0) invert(1);
}

.footer-brand p {
    font-size: 0.9rem;
    max-width: 280px;
    line-height: 1.6;
}

.footer-links h4 {
    color: var(--white);
    font-size: 0.95rem;
    font-weight: 600;
    margin-bottom: 16px;
}

.footer-links ul {
    list-style: none;
}

.footer-links li {
    margin-bottom: 10px;
}

.footer-links a {
    color: rgba(255, 255, 255, 0.6);
    font-size: 0.9rem;
    transition: color var(--transition);
}

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

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding: 20px 0;
}

.footer-bottom p {
    font-size: 0.85rem;
    color: rgba(255, 255, 255, 0.4);
    text-align: center;
}

/* ── Responsive ────────────────────────────────────────────────── */

/* Tablet */
@media (max-width: 900px) {
    .features-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .footer-content {
        grid-template-columns: 1fr 1fr;
    }

    .footer-brand {
        grid-column: span 2;
    }
}

/* Mobile */
@media (max-width: 600px) {
    :root {
        --nav-height: 64px;
    }

    .nav-links {
        display: none;
        position: absolute;
        top: var(--nav-height);
        left: 0;
        right: 0;
        flex-direction: column;
        background: var(--white);
        padding: 16px 24px;
        gap: 0;
        box-shadow: 0 8px 24px rgba(0, 0, 0, 0.1);
    }

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

    .nav-links a {
        color: var(--text) !important;
        padding: 12px 0;
        display: block;
        border-bottom: 1px solid var(--border);
    }

    .nav-links li:last-child a {
        border-bottom: none;
    }

    .nav-toggle {
        display: flex;
    }

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

    .hero {
        padding: 100px 20px 60px;
        min-height: auto;
    }

    .hero-logo {
        height: 56px;
    }

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

    .btn {
        width: 100%;
        max-width: 280px;
    }

    .features,
    .screenshots,
    .download {
        padding: 64px 0;
    }

    .download-card {
        padding: 36px 24px;
    }

    .system-reqs {
        flex-direction: column;
        gap: 8px;
    }

    .footer-content {
        grid-template-columns: 1fr;
        gap: 32px;
    }

    .footer-brand {
        grid-column: span 1;
    }
}