/* ═══════════════════════════════════════════════════════════════
   SiteCheck — Main CSS
   Design System: Variables, Reset, Typography, Layout
   ═══════════════════════════════════════════════════════════════ */

/* ─── CSS Variables ───────────────────────────────────────────── */
:root {
    /* Current (Dark) - Default */
    --color-bg:           #0a0b14;
    --color-bg-card:      #111527;
    --color-bg-elevated:  #161a30;
    --color-border:       rgba(255,255,255,0.06);
    --color-border-hover: rgba(255,255,255,0.12);

    --color-primary:       #6366f1;
    --color-primary-hover: #5254cc;
    --color-primary-glow:  rgba(99,102,241,0.25);

    --color-text:        #f1f5f9;
    --color-text-muted:  #94a3b8;
    --color-text-faint:  #475569;

    --gradient-hero:     radial-gradient(ellipse 80% 50% at 50% -10%, rgba(99,102,241,0.15), transparent);
    --shadow-base:       0 8px 32px rgba(0,0,0,0.5);
    --glass-bg:          rgba(17, 21, 39, 0.7);
    --glass-border:      rgba(255, 255, 255, 0.05);
}

[data-theme="light"] {
    --color-bg:           #f8fafc;
    --color-bg-card:      #ffffff;
    --color-bg-elevated:  #f1f5f9;
    --color-border:       rgba(0,0,0,0.06);
    --color-border-hover: rgba(0,0,0,0.1);

    --color-primary:       #4f46e5;
    --color-primary-hover: #4338ca;
    --color-primary-glow:  rgba(79,70,229,0.15);

    --color-text:        #0f172a;
    --color-text-muted:  #475569;
    --color-text-faint:  #94a3b8;

    --gradient-hero:     radial-gradient(ellipse 80% 50% at 50% -10%, rgba(79,70,229,0.08), transparent);
    --shadow-base:       0 8px 32px rgba(0,0,0,0.06);
    --glass-bg:          rgba(255, 255, 255, 0.8);
    --glass-border:      rgba(0, 0, 0, 0.05);
}

:root {
    /* Shared values */
    --color-success:  #10b981;
    --color-warning:  #f59e0b;
    --color-danger:   #ef4444;
    --color-info:     #0ea5e9;

    --gradient-primary:  linear-gradient(135deg, #6366f1 0%, #a855f7 100%);
    --gradient-card:     linear-gradient(145deg, var(--color-bg-card) 0%, var(--color-bg) 100%);

    --font-base:     'Inter', system-ui, -apple-system, sans-serif;
    --font-size-xs:  0.75rem;
    --font-size-sm:  0.875rem;
    --font-size-md:  1rem;
    --font-size-lg:  1.125rem;
    --font-size-xl:  1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 1.875rem;
    --font-size-4xl: 2.25rem;
    --font-size-5xl: 3rem;
    --font-size-6xl: 3.75rem;

    --space-1: 0.25rem; --space-2: 0.5rem; --space-3: 0.75rem; --space-4: 1rem;
    --space-5: 1.25rem; --space-6: 1.5rem; --space-8: 2rem; --space-10: 2.5rem;
    --space-12: 3rem; --space-16: 4rem; --space-20: 5rem; --space-24: 6rem;

    --radius-sm:   0.4rem;
    --radius-md:   0.75rem;
    --radius-lg:   1.25rem;
    --radius-xl:   2rem;
    --radius-full: 9999px;

    --shadow-sm:     0 1px 2px rgba(0,0,0,0.05);
    --shadow-md:     0 4px 12px rgba(0,0,0,0.08);
    --shadow-lg:     var(--shadow-base);
    --shadow-glow:   0 0 30px var(--color-primary-glow);
    --shadow-card:   var(--shadow-md);

    --transition-fast:   0.2s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-base:   0.4s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow:   0.6s cubic-bezier(0.4, 0, 0.2, 1);

    --container-max:  1280px;
    --container-pad:  2rem;
}

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

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

body {
    font-family: var(--font-base);
    font-size: var(--font-size-md);
    color: var(--color-text);
    background-color: var(--color-bg);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    min-height: 100vh;
    transition: background-color var(--transition-base), color var(--transition-base);
}

img, video { max-width: 100%; display: block; }
a { color: var(--color-primary); text-decoration: none; transition: color var(--transition-fast); }
a:hover { color: var(--color-primary-hover); }
ul { list-style: none; }
hr { border: none; border-top: 1px solid var(--color-border); transition: border-color var(--transition-base); }

/* ─── Typography ───────────────────────────────────────────────── */
h1, h2, h3, h4, h5, h6 { transition: color var(--transition-base); }
h1 { font-size: var(--font-size-5xl); font-weight: 800; line-height: 1.15; }
h2 { font-size: var(--font-size-4xl); font-weight: 700; line-height: 1.2; }
h3 { font-size: var(--font-size-2xl); font-weight: 600; }
h4 { font-size: var(--font-size-lg);  font-weight: 600; }
p  { color: var(--color-text-muted); line-height: 1.7; }

.text-gradient {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}
.text-muted   { color: var(--color-text-muted); }
.text-success { color: var(--color-success); }
.text-warning { color: var(--color-warning); }
.text-danger  { color: var(--color-danger); }

/* ─── Layout ───────────────────────────────────────────────────── */
.container {
    max-width: var(--container-max);
    margin-inline: auto;
    padding-inline: var(--container-pad);
}

.main-content { min-height: calc(100vh - 80px - 280px); }

.section { padding-block: var(--space-24); }
.section--dark { background: var(--color-bg-card); }

.section-header {
    text-align: center;
    margin-bottom: var(--space-16);
}
.section-header h2 { margin-bottom: var(--space-4); }
.section-header p  { font-size: var(--font-size-lg); }

/* ─── Navbar ───────────────────────────────────────────────────── */
.navbar {
    position: sticky;
    top: 0;
    z-index: 1000;
    background: var(--glass-bg);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--glass-border);
    height: 80px;
    display: flex;
    align-items: center;
    transition: background-color var(--transition-base), border-color var(--transition-base);
}

.navbar__inner {
    display: flex;
    align-items: center;
    gap: var(--space-8);
    width: 100%;
}

.navbar__logo {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    color: var(--color-text);
    font-size: var(--font-size-xl);
    font-weight: 700;
    text-decoration: none;
}
.navbar__logo:hover { color: var(--color-text); }
.logo-icon { font-size: 1.4rem; }
.logo-text strong { color: var(--color-primary); }

.navbar__links {
    display: flex;
    gap: var(--space-6);
    margin-left: auto;
}
.nav-link {
    color: var(--color-text-muted);
    font-size: var(--font-size-sm);
    font-weight: 500;
    transition: color var(--transition-fast);
}
.nav-link:hover { color: var(--color-text); }

.navbar__auth {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    margin-left: var(--space-4);
}

.navbar__mobile-toggle { display: none; }
.navbar__mobile        { display: none; }

/* Theme Toggle */
.theme-toggle {
    background: var(--color-bg-elevated);
    border: 1px solid var(--color-border);
    width: 40px; height: 40px;
    border-radius: var(--radius-md);
    cursor: pointer;
    display: flex; align-items: center; justify-content: center;
    transition: all var(--transition-fast);
    margin-left: auto;
    overflow: hidden;
}
.theme-toggle:hover {
    border-color: var(--color-primary);
    background: var(--color-bg-card);
    transform: translateY(-1px);
}
.theme-toggle__icon { font-size: 1.1rem; transition: transform 0.5s cubic-bezier(0.4, 0, 0.2, 1); }

[data-theme="dark"] .theme-toggle__icon--sun {
    transform: translateY(40px);
    position: absolute;
}
[data-theme="light"] .theme-toggle__icon--sun { transform: translateY(0); }
[data-theme="light"] .theme-toggle__icon--moon {
    transform: translateY(40px);
    position: absolute;
}

/* ─── User Menu ───────────────────────────────────────────────── */
.user-menu { position: relative; }
.user-menu__trigger {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    font-size: var(--font-size-sm);
}
.user-avatar {
    width: 32px; height: 32px;
    background: var(--gradient-primary);
    border-radius: var(--radius-full);
    display: flex; align-items: center; justify-content: center;
    font-weight: 700; font-size: var(--font-size-sm);
    color: white;
}
.user-menu__dropdown {
    position: absolute;
    top: calc(100% + 8px);
    right: 0;
    background: var(--color-bg-elevated);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: var(--space-2);
    min-width: 180px;
    box-shadow: var(--shadow-lg);
    z-index: 1001;
}
.user-menu__dropdown a {
    display: block;
    padding: var(--space-2) var(--space-3);
    color: var(--color-text-muted);
    font-size: var(--font-size-sm);
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
}
.user-menu__dropdown a:hover {
    background: var(--color-border);
    color: var(--color-text);
}
.user-menu__dropdown hr { margin: var(--space-2) 0; border-top: 1px solid var(--color-border); }

/* Plan Badge */
.plan-badge {
    font-size: 10px;
    font-weight: 700;
    padding: 2px 6px;
    border-radius: var(--radius-full);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}
.plan-badge--free   { background: rgba(148,163,184,0.1); color: var(--color-text-muted); }
.plan-badge--pro    { background: rgba(99,102,241,0.15); color: var(--color-primary); }
.plan-badge--agency { background: rgba(168,85,247,0.15); color: #a855f7; }

/* ─── Hero ─────────────────────────────────────────────────────── */
.hero {
    position: relative;
    padding: var(--space-24) 0 var(--space-20);
    text-align: center;
    overflow: hidden;
}
.hero__bg-decoration {
    position: absolute;
    inset: 0;
    background: var(--gradient-hero);
    pointer-events: none;
}
.hero__content {
    position: relative;
    z-index: 1;
    max-width: 1170px;
    margin-inline: auto;
}
.hero__badge {
    display: inline-block;
    background: rgba(99,102,241,0.12);
    border: 1px solid rgba(99,102,241,0.3);
    color: var(--color-primary);
    font-size: var(--font-size-sm);
    font-weight: 500;
    padding: var(--space-2) var(--space-5);
    border-radius: var(--radius-full);
    margin-bottom: var(--space-6);
    animation: fadeInDown 0.6s ease both;
}
.hero__title {
    font-size: var(--font-size-6xl);
    margin-bottom: var(--space-6);
    animation: fadeInUp 0.6s 0.1s ease both;
}
.hero__subtitle {
    font-size: var(--font-size-lg);
    color: var(--color-text-muted);
    margin-bottom: var(--space-10);
    animation: fadeInUp 0.6s 0.2s ease both;
}

/* ─── Scan Form ────────────────────────────────────────────────── */
.scan-form {
    animation: fadeInUp 0.6s 0.3s ease both;
}
.scan-form__input-wrap {
    display: flex;
    align-items: center;
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
    padding: var(--space-2) var(--space-2) var(--space-2) var(--space-5);
    gap: var(--space-3);
    transition: background-color var(--transition-base),
                border-color var(--transition-base),
                box-shadow var(--transition-base);
    max-width: 680px;
    margin-inline: auto;
}
.scan-form__input-wrap:focus-within {
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px var(--color-primary-glow);
}
.scan-form__icon    { font-size: 1.25rem; flex-shrink: 0; }
.scan-form__input {
    flex: 1;
    background: none;
    border: none;
    outline: none;
    color: var(--color-text);
    font-size: var(--font-size-md);
    font-family: var(--font-base);
    min-width: 0;
}
.scan-form__input::placeholder { color: var(--color-text-faint); }
.scan-form__note {
    margin-top: var(--space-3);
    font-size: var(--font-size-sm);
    color: var(--color-text-faint);
}

/* Trust Badges */
.trust-badges {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-3);
    justify-content: center;
    margin-top: var(--space-8);
    animation: fadeInUp 0.6s 0.4s ease both;
}
.trust-badges span {
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    padding: var(--space-2) var(--space-4);
    border-radius: var(--radius-full);
}

/* ─── Features Grid ────────────────────────────────────────────── */
.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-6);
}
.feature-card--wide { grid-column: span 3; }

/* ─── Stats Bar ────────────────────────────────────────────────── */
.stats-bar__inner {
    display: flex;
    justify-content: center;
    gap: var(--space-16);
    flex-wrap: wrap;
    text-align: center;
}
.stat-item strong {
    display: block;
    font-size: var(--font-size-4xl);
    font-weight: 800;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}
.stat-item span { font-size: var(--font-size-sm); color: var(--color-text-muted); }

/* ─── CTA ──────────────────────────────────────────────────────── */
.cta__inner { text-align: center; }
.cta__inner h2 { margin-bottom: var(--space-4); }
.cta__inner p  { margin-bottom: var(--space-8); }
.cta__buttons  { display: flex; gap: var(--space-4); justify-content: center; flex-wrap: wrap; }

/* ─── Auth ─────────────────────────────────────────────────────── */
.auth-section {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: calc(100vh - 72px);
    padding: var(--space-8) var(--space-4);
    background: var(--gradient-hero);
}
.auth-card {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
    padding: var(--space-10);
    width: 100%;
    max-width: 420px;
    box-shadow: var(--shadow-card);
    transition: background-color var(--transition-base),
                border-color var(--transition-base),
                color var(--transition-base),
                box-shadow var(--transition-base);
    animation: fadeInUp 0.4s ease both;
}
.auth-card__header {
    text-align: center;
    margin-bottom: var(--space-8);
}
.auth-logo { font-size: 2.5rem; margin-bottom: var(--space-4); }
.auth-card__header h1 { font-size: var(--font-size-3xl); margin-bottom: var(--space-2); }
.auth-card__footer {
    text-align: center;
    margin-top: var(--space-6);
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
}
.auth-terms {
    font-size: var(--font-size-xs);
    color: var(--color-text-faint);
    text-align: center;
    margin-top: var(--space-4);
}

/* ─── Footer ───────────────────────────────────────────────────── */
.footer {
    background: var(--color-bg-card);
    border-top: 1px solid var(--color-border);
    padding-top: var(--space-16);
}
.footer__inner {
    display: grid;
    grid-template-columns: 1.5fr 2fr;
    gap: var(--space-12);
    padding-bottom: var(--space-12);
}
.footer__brand .logo-text { font-size: var(--font-size-xl); font-weight: 700; }
.footer__brand p { margin-top: var(--space-3); font-size: var(--font-size-sm); }
.footer__links { display: flex; gap: var(--space-12); }
.footer__col { display: flex; flex-direction: column; gap: var(--space-3); }
.footer__col h4 { color: var(--color-text); font-size: var(--font-size-sm); margin-bottom: var(--space-1); }
.footer__col a { font-size: var(--font-size-sm); color: var(--color-text-muted); }
.footer__col a:hover { color: var(--color-text); }
.footer__bottom {
    border-top: 1px solid var(--color-border);
    padding: var(--space-6) 0;
    text-align: center;
}
.footer__bottom p { font-size: var(--font-size-sm); }

/* ─── Flash ────────────────────────────────────────────────────── */
.flash {
    position: fixed;
    top: var(--space-6);
    right: var(--space-6);
    padding: var(--space-4) var(--space-6);
    border-radius: var(--radius-md);
    font-size: var(--font-size-sm);
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: var(--space-4);
    z-index: 9999;
    max-width: 380px;
    box-shadow: var(--shadow-lg);
    animation: slideInRight 0.3s ease;
}
.flash--success { background: rgba(34,197,94,0.15); border: 1px solid var(--color-success); color: var(--color-success); }
.flash--error   { background: rgba(239,68,68,0.15);  border: 1px solid var(--color-danger);  color: var(--color-danger); }
.flash--info    { background: rgba(56,189,248,0.15); border: 1px solid var(--color-info);    color: var(--color-info); }
.flash__close { background: none; border: none; color: inherit; cursor: pointer; font-size: 1.1rem; opacity: 0.7; margin-left: auto; }

/* ─── Animations ───────────────────────────────────────────────── */
@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(30px); }
    to   { opacity: 1; transform: translateY(0); }
}
@keyframes fadeInDown {
    from { opacity: 0; transform: translateY(-30px); }
    to   { opacity: 1; transform: translateY(0); }
}
@keyframes slideInRight {
    from { opacity: 0; transform: translateX(30px); }
    to   { opacity: 1; transform: translateX(0); }
}
@keyframes spin {
    to { transform: rotate(360deg); }
}

/* Reveal Init */
.reveal-init {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity var(--transition-slow), transform var(--transition-slow);
}
.revealed {
    opacity: 1;
    transform: translateY(0);
}
/* Staggered children reveal */
.revealed > * {
    animation: fadeInUp 0.6s cubic-bezier(0.4, 0, 0.2, 1) both;
}
.revealed > *:nth-child(1) { animation-delay: 0.1s; }
.revealed > *:nth-child(2) { animation-delay: 0.2s; }
.revealed > *:nth-child(3) { animation-delay: 0.3s; }
.revealed > *:nth-child(4) { animation-delay: 0.4s; }

/* ─── Responsive ───────────────────────────────────────────────── */
@media (max-width: 1024px) {
    .features-grid { grid-template-columns: repeat(2, 1fr); }
    .feature-card--wide { grid-column: span 2; }
}

@media (max-width: 768px) {
    h1 { font-size: var(--font-size-4xl); }
    h2 { font-size: var(--font-size-3xl); }
    .hero__title { font-size: var(--font-size-4xl); }

    .navbar__links  { display: none; }
    .navbar__auth   { display: none; }
    .navbar__mobile-toggle {
        display: flex; flex-direction: column; gap: 5px;
        background: none; border: none; cursor: pointer; margin-left: auto;
    }
    .navbar__mobile-toggle span {
        display: block; width: 24px; height: 2px;
        background: var(--color-text); border-radius: 2px;
    }
    .navbar__mobile {
        display: flex; flex-direction: column; gap: var(--space-2);
        background: var(--color-bg-card);
        border-top: 1px solid var(--color-border);
        padding: var(--space-4);
    }
    .navbar__mobile a {
        color: var(--color-text-muted); font-size: var(--font-size-sm);
        padding: var(--space-3); border-radius: var(--radius-sm);
    }
    .navbar__mobile a:hover { background: var(--color-border); color: var(--color-text); }

    .scan-form__btn { padding: var(--space-3) var(--space-5); }
    .features-grid  { grid-template-columns: 1fr; }
    .feature-card--wide { grid-column: span 1; }
    .footer__inner  { grid-template-columns: 1fr; }
    .footer__links  { flex-wrap: wrap; gap: var(--space-6); }
    .stats-bar__inner { gap: var(--space-8); }
}