/* ============================================================
   ITERUN LANDING PAGE — style.css
   Minimal & clean. Dark/light theme via [data-theme].
   ============================================================ */

/* ── Reset ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
img, svg { display: block; }
a { color: inherit; text-decoration: none; }
button { font-family: inherit; cursor: pointer; border: none; background: none; }

/* ── Tokens ── */
:root {
    /* brand — matches app icon gradient (golden orange → red-orange) */
    --accent:        #ff6b30;
    --accent-hover:  #e8521a;
    --accent-glow:   rgba(255, 107, 48, 0.25);
    --accent-start:  #ffaa28;
    --accent-end:    #ff4420;
    --accent-gradient: linear-gradient(135deg, var(--accent-start), var(--accent-end));

    /* typography */
    --font: 'Inter', system-ui, sans-serif;

    /* layout */
    --max-w: 1080px;
    --nav-h: 64px;
    --radius: 14px;
    --radius-sm: 8px;

    /* transitions */
    --t: 200ms ease;
}

/* ── Light theme ── */
[data-theme="light"] {
    --bg:          #f9fafb;
    --bg-alt:      #fff8f5;
    --surface:     #ffffff;
    --surface-2:   #f3f4f6;
    --border:      #e5e7eb;
    --text:        #0f172a;
    --text-2:      #475569;
    --text-3:      #94a3b8;
    --nav-bg:      rgba(249, 250, 251, 0.85);

    /* aurora off in light */
    --aurora-op: 0;
    --daylight-op: 1;
}

/* ── Dark theme ── */
[data-theme="dark"] {
    --bg:          #050a14;
    --bg-alt:      #100a06;
    --surface:     #0d1526;
    --surface-2:   #111d33;
    --border:      rgba(255,255,255,0.08);
    --text:        #f1f5f9;
    --text-2:      #94a3b8;
    --text-3:      #475569;
    --nav-bg:      rgba(5, 10, 20, 0.85);

    --aurora-op: 1;
    --daylight-op: 0;
}

/* ── Base ── */
html { scroll-behavior: smooth; }
body {
    font-family: var(--font);
    background: var(--bg);
    color: var(--text);
    font-size: 16px;
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    transition: background var(--t), color var(--t);
}

/* ── Container ── */
.container {
    width: 100%;
    max-width: var(--max-w);
    margin-inline: auto;
    padding-inline: 24px;
}

/* ============================================================
   NAV
   ============================================================ */
.nav {
    position: fixed;
    top: 0; left: 0; right: 0;
    height: var(--nav-h);
    z-index: 100;
    background: var(--nav-bg);
    border-bottom: 1px solid var(--border);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    transition: background var(--t), border-color var(--t);
}

.nav-container {
    max-width: var(--max-w);
    height: 100%;
    margin-inline: auto;
    padding-inline: 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

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

.nav-logo {
    border-radius: 8px;
}

.nav-name {
    font-size: 17px;
    font-weight: 700;
    letter-spacing: -0.3px;
    color: var(--text);
}

.nav-actions {
    display: flex;
    align-items: center;
    gap: 12px;
}

/* theme toggle */
.theme-toggle {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-2);
    transition: color var(--t), background var(--t);
}
.theme-toggle:hover {
    color: var(--text);
    background: var(--surface-2);
}
.icon-sun  { display: none; }
.icon-moon { display: block; }
[data-theme="dark"] .icon-sun  { display: block; }
[data-theme="dark"] .icon-moon { display: none; }

/* Lucide outputs <svg> inside <i> — make it inherit flex layout */
.icon-sun svg, .icon-moon svg { display: block; }

/* ============================================================
   BUTTONS
   ============================================================ */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-family: var(--font);
    font-weight: 600;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: background var(--t), color var(--t), box-shadow var(--t), transform var(--t);
    white-space: nowrap;
    text-decoration: none;
}
.btn:active { transform: scale(0.97); }

.btn-primary {
    background: var(--accent-gradient);
    color: #fff;
}
.btn-primary:hover {
    background: var(--accent-gradient);
    filter: brightness(1.08);
    box-shadow: 0 0 0 4px var(--accent-glow);
}

.btn-white {
    background: #fff;
    color: #0f172a;
}
.btn-white:hover {
    background: #f1f5f9;
    box-shadow: 0 4px 20px rgba(0,0,0,0.15);
}

.btn-sm  { padding: 8px 16px;  font-size: 14px; }
.btn-lg  { padding: 14px 28px; font-size: 16px; border-radius: var(--radius); }

/* ============================================================
   HERO
   ============================================================ */
.hero {
    position: relative;
    min-height: 100svh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    overflow: hidden;
    padding-top: var(--nav-h);
    padding-bottom: 64px;
}

/* background blobs */
.hero-bg {
    position: absolute;
    inset: 0;
    pointer-events: none;
    overflow: hidden;
}

/* aurora (dark) */
.aurora-blob {
    position: absolute;
    border-radius: 50%;
    filter: blur(80px);
    opacity: var(--aurora-op);
    transition: opacity 0.4s ease;
}
.aurora-blob-1 {
    width: 560px; height: 560px;
    top: -80px; left: -120px;
    background: radial-gradient(circle, rgba(255,170,40,0.3) 0%, transparent 70%);
    animation: float1 14s ease-in-out infinite;
}
.aurora-blob-2 {
    width: 480px; height: 480px;
    bottom: -60px; right: -100px;
    background: radial-gradient(circle, rgba(255,68,32,0.25) 0%, transparent 70%);
    animation: float2 18s ease-in-out infinite;
}
.aurora-blob-3 {
    width: 400px; height: 400px;
    top: 50%; left: 50%;
    transform: translate(-50%, -50%);
    background: radial-gradient(circle, rgba(255,107,48,0.12) 0%, transparent 70%);
    animation: float3 22s ease-in-out infinite;
}

/* daylight (light) */
.daylight-blob {
    position: absolute;
    border-radius: 50%;
    filter: blur(100px);
    opacity: var(--daylight-op);
    transition: opacity 0.4s ease;
}
.daylight-blob-1 {
    width: 600px; height: 600px;
    top: -100px; left: -150px;
    background: radial-gradient(circle, rgba(255,200,100,0.45) 0%, transparent 70%);
}
.daylight-blob-2 {
    width: 500px; height: 500px;
    bottom: -80px; right: -120px;
    background: radial-gradient(circle, rgba(255,120,60,0.3) 0%, transparent 70%);
}
.daylight-blob-3 {
    width: 400px; height: 400px;
    top: 40%; left: 55%;
    background: radial-gradient(circle, rgba(255,160,40,0.2) 0%, transparent 70%);
}

@keyframes float1 { 0%,100%{transform:translate(0,0)} 50%{transform:translate(30px,-30px)} }
@keyframes float2 { 0%,100%{transform:translate(0,0)} 50%{transform:translate(-25px,25px)} }
@keyframes float3 { 0%,100%{transform:translate(-50%,-50%)} 50%{transform:translate(-52%,-48%)} }

/* hero content */
.hero-content {
    position: relative;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 20px;
    padding: 60px 24px;
    max-width: 640px;
}

.hero-logo {
    border-radius: 20px;
    box-shadow: 0 8px 32px rgba(0,0,0,0.2);
}

.hero-badge {
    display: inline-block;
    padding: 6px 14px;
    border-radius: 999px;
    background: var(--accent-glow);
    border: 1px solid rgba(255,107,48,0.35);
    color: var(--accent);
    font-size: 13px;
    font-weight: 600;
    letter-spacing: 0.2px;
}

.hero-title {
    font-size: clamp(2.2rem, 6vw, 3.4rem);
    font-weight: 800;
    line-height: 1.15;
    letter-spacing: -0.03em;
    color: var(--text);
}

.hero-subtitle {
    font-size: clamp(1rem, 2.5vw, 1.15rem);
    color: var(--text-2);
    line-height: 1.65;
}

.hero-disclaimer {
    font-size: 13px;
    color: var(--text-3);
}

/* ============================================================
   SECTIONS
   ============================================================ */
.section {
    padding-block: 96px;
}
.section-alt {
    background: var(--bg-alt);
}

.section-header {
    text-align: center;
    margin-bottom: 56px;
}

.section-title {
    font-size: clamp(1.6rem, 4vw, 2.2rem);
    font-weight: 800;
    letter-spacing: -0.025em;
    line-height: 1.2;
    color: var(--text);
    margin-bottom: 12px;
}

.section-subtitle {
    font-size: 1.05rem;
    color: var(--text-2);
    max-width: 480px;
    margin-inline: auto;
    line-height: 1.65;
}

/* ============================================================
   HOW IT WORKS — STEPS
   ============================================================ */
.steps-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.step-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 32px 28px;
    position: relative;
    transition: border-color var(--t), box-shadow var(--t);
}
.step-card:hover {
    border-color: var(--accent);
    box-shadow: 0 0 0 4px var(--accent-glow);
}

.step-icon {
    width: 48px;
    height: 48px;
    border-radius: 12px;
    background: var(--surface-2);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--accent);
    margin-bottom: 20px;
}

.step-service-logo {
    width: 26px;
    height: 26px;
    object-fit: contain;
    border-radius: 6px;
}

.step-title {
    font-size: 1rem;
    font-weight: 700;
    color: var(--text);
    margin-bottom: 8px;
    letter-spacing: -0.01em;
}

.step-desc {
    font-size: 0.9rem;
    color: var(--text-2);
    line-height: 1.65;
}

/* ============================================================
   FEATURES GRID
   ============================================================ */
.features-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
}

.feature-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 28px;
    display: flex;
    flex-direction: column;
    gap: 12px;
    transition: border-color var(--t), box-shadow var(--t);
    cursor: default;
}
.feature-card:hover {
    border-color: rgba(255,107,48,0.4);
    box-shadow: 0 4px 24px rgba(255,107,48,0.08);
}

.feature-icon {
    width: 44px;
    height: 44px;
    border-radius: 10px;
    background: var(--surface-2);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--accent);
}

.feature-title {
    font-size: 0.95rem;
    font-weight: 700;
    color: var(--text);
    letter-spacing: -0.01em;
}

.feature-desc {
    font-size: 0.875rem;
    color: var(--text-2);
    line-height: 1.65;
}

/* ============================================================
   HERO SCREENSHOTS
   ============================================================ */
.hero-screenshots {
    width: 100%;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
    padding-block: 48px 0;
}
.hero-screenshots::-webkit-scrollbar { display: none; }

.screenshots-track {
    display: flex;
    gap: 20px;
    padding-inline: 48px;
    width: max-content;
}

/* Phone frame — real screenshots */
.phone-frame {
    flex-shrink: 0;
    margin: 0;
    border: none;
    background: transparent;
    box-shadow: none;
    transition: transform var(--t);
    width: 330px;
}

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

/* ============================================================
   CTA BANNER
   ============================================================ */
.cta-banner {
    background: var(--accent-gradient);
    padding-block: 80px;
}

.cta-inner {
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 20px;
}

.cta-title {
    font-size: clamp(1.6rem, 4vw, 2.2rem);
    font-weight: 800;
    color: #fff;
    letter-spacing: -0.025em;
    line-height: 1.2;
}

.cta-subtitle {
    color: rgba(255,255,255,0.8);
    font-size: 1rem;
    max-width: 420px;
    line-height: 1.65;
}

.cta-note {
    font-size: 13px;
    color: rgba(255,255,255,0.6);
}

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

.footer-top {
    display: flex;
    align-items: center;
    gap: 16px;
    margin-bottom: 28px;
}

.footer-brand {
    display: flex;
    align-items: center;
    gap: 8px;
}

.footer-logo { border-radius: 6px; }

.footer-name {
    font-size: 15px;
    font-weight: 700;
    color: var(--text);
}

.footer-tagline {
    font-size: 13px;
    color: var(--text-3);
}

.footer-bottom {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 12px;
}

.footer-copy {
    font-size: 13px;
    color: var(--text-3);
}

.footer-links {
    display: flex;
    gap: 20px;
    flex-wrap: wrap;
}

.footer-links a {
    font-size: 13px;
    color: var(--text-3);
    transition: color var(--t);
    cursor: pointer;
}
.footer-links a:hover { color: var(--accent); }

/* ============================================================
   REDUCED MOTION
   ============================================================ */
@media (prefers-reduced-motion: reduce) {
    .aurora-blob-1, .aurora-blob-2, .aurora-blob-3 { animation: none; }
    *, *::before, *::after { transition-duration: 0.01ms !important; }
}

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width: 768px) {
    .steps-grid {
        grid-template-columns: 1fr;
    }
    .features-grid {
        grid-template-columns: 1fr;
    }
    .section { padding-block: 64px; }
    .footer-top { flex-direction: column; align-items: flex-start; }
    .footer-bottom { flex-direction: column; align-items: flex-start; }
}

@media (max-width: 480px) {
    .hero-content { padding: 40px 16px; }
    .btn-lg { padding: 13px 22px; font-size: 15px; }
}