/* animations.css
 * Animation-specific styles for WineMembers.AI redesign
 * Includes CLS prevention, initial states, and reduced motion support
 */

/* ==========================================================================
   CLS Prevention - Reserve space before JS loads
   ========================================================================== */

.hero {
    min-height: 100vh;
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    background: var(--bg-hero, #0a0608);
}

.hero-content {
    position: relative;
    z-index: 10;
    text-align: center;
    max-width: 48rem;
    margin: 0 auto;
    padding: 5rem 1rem;
}

.hero .lead-in {
    font-size: 1.125rem;
    color: var(--muted-foreground, #a1a1aa);
    margin-bottom: 1.5rem;
    opacity: 0.9;
}

.hero .headline {
    font-size: clamp(2.5rem, 8vw, 4.5rem);
    font-weight: 700;
    line-height: 1.1;
    margin-bottom: 1.5rem;
    color: var(--foreground, #fafafa);
}

.hero .subhead {
    font-size: 1.25rem;
    color: var(--muted-foreground, #a1a1aa);
    margin-bottom: 2rem;
    max-width: 36rem;
    margin-left: auto;
    margin-right: auto;
}

.hero .cta {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.75rem 2rem;
    font-size: 1rem;
    font-weight: 500;
    color: var(--primary-foreground, #fff);
    background: var(--primary, #dc2626);
    border-radius: 0.5rem;
    text-decoration: none;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.hero .cta:hover {
    transform: scale(1.05);
    box-shadow: 0 10px 30px -10px var(--primary, #dc2626);
}

.features-grid,
.features-section {
    min-height: 600px;
}

.contact-section {
    min-height: 500px;
}

/* ==========================================================================
   Initial States for JS Reveal Animations

   PROGRESSIVE ENHANCEMENT: Content is VISIBLE by default.
   JavaScript sets opacity:0/transform via gsap.set() when ready.
   If JS fails, content remains visible (no hiding in CSS).

   The .js-ready class is added to body when GSAP initializes successfully.
   ========================================================================== */

/* Only hide elements when JavaScript is confirmed ready */
body.js-ready .faq-item.js-animate {
    /* FAQ items: JS will set initial state via gsap.set() */
    /* This selector exists for documentation - actual hiding done by GSAP */
}

/* Fallback: If GSAP fails to load, ensure all animated content is visible */
body.gsap-unavailable .js-animate,
body.gsap-unavailable .faq-item.js-animate,
body.gsap-unavailable .stats-card.js-animate,
body.gsap-unavailable .feature-card.js-animate {
    opacity: 1 !important;
    transform: none !important;
}

/* No-JS fallback: Content visible by default when JS doesn't run at all */
/* Note: .js-animate elements are NOT hidden in CSS by default */
/* JavaScript sets initial hidden state only when GSAP is ready */

/* ==========================================================================
   Color Transitions (CSS Custom Properties)

   Color Progression (warm shift as user scrolls):
   Hero (#0a0608) → Stats (#0a0608) → Features (#0f0809) → FAQ (#120a0c) → Contact (#120a0c)

   Source: _bmad-output/planning-artifacts/ux-design-specification.md
   ADR-003: Use CSS custom properties for GSAP-driven color interpolation

   Interpolation Zones:
   - Hero → Stats: No change (both darkest)
   - Stats → Features: Subtle warm shift (#0a0608 → #0f0809)
   - Features → FAQ: Continue warming (#0f0809 → #120a0c)
   - FAQ → Contact: No change (both warmest)
   ========================================================================== */

:root {
    --bg-current: #0a0608;
    --bg-hero: #0a0608;
    --bg-stats: #0a0608;
    --bg-features: #0f0809;
    --bg-faq: #120a0c;
    --bg-contact: #120a0c;
}

/* Body uses --bg-current for GSAP-driven color interpolation (Story 7.2) */
body {
    background-color: var(--bg-current);
}

/* Section-specific background fallbacks (work without JS)
   All sections use CSS variables for consistency per ADR-003 */
.stats {
    background: var(--bg-stats, #0a0608);
}

.features {
    background: var(--bg-features, #0f0809);
}

.faq {
    background: var(--bg-faq, #120a0c);
}

.contact {
    background: var(--bg-contact, #120a0c);
}

/* ==========================================================================
   Focus Indicators (Keyboard Navigation)
   ========================================================================== */

/* Global focus indicator for keyboard navigation */
:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 2px;
}

/* Remove default focus for mouse clicks */
:focus:not(:focus-visible) {
    outline: none;
}

/* Ensure all interactive elements show focus on keyboard navigation */
button:focus-visible,
a:focus-visible,
input:focus-visible,
textarea:focus-visible,
select:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 2px;
}

/* Hero CTA button specific focus */
.cta:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 2px;
    background: var(--accent-hover);
}

/* Skip link for keyboard navigation */
.skip-link {
    position: absolute;
    left: -9999px;
    top: 0;
    z-index: 9999;
    padding: 0.5rem 1rem;
    background: var(--accent);
    color: var(--primary-foreground, #ffffff);
    text-decoration: none;
    font-weight: 500;
    border-radius: 0.25rem;
    transition: left 0.2s ease;
}

.skip-link:focus {
    left: 1rem;
}

/* ==========================================================================
   Reduced Motion Support
   ========================================================================== */

@media (prefers-reduced-motion: reduce) {
    .js-animate {
        opacity: 1;
        transform: none;
    }

    .hero {
        min-height: auto;
    }

    /* Disable all transitions and animations */
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* Class-based reduced motion (set by JS) */
.reduced-motion .js-animate {
    opacity: 1;
    transform: none;
}

.reduced-motion .hero {
    min-height: auto;
}

/* ==========================================================================
   Wine Legs Canvas Styles
   ========================================================================== */

#wine-legs-canvas {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 1;
}


/* ==========================================================================
   Stats Section Animation States
   ========================================================================== */

/* Stats section CLS prevention - reserve space */
.stats,
.stats-section {
    min-height: 80vh;
}

/* Stats card initial state for animation
   GSAP fromTo() handles the actual animation values */
.stats-card.js-animate {
    /* Override the generic .js-animate opacity:0 for stats cards
       GSAP will set the initial state via fromTo() */
    opacity: 0;
    transform: translateY(60px);
}

/* Reduced motion: canvas shows static texture instead of animation */
@media (prefers-reduced-motion: reduce) {
    #wine-legs-canvas {
        display: block;
        opacity: 0.4;
    }
}

.reduced-motion #wine-legs-canvas {
    display: block;
    opacity: 0.4;
}

/* Reduced motion fallback - ensure stats cards are visible */
@media (prefers-reduced-motion: reduce) {
    .stats-card,
    .stats-card.js-animate {
        opacity: 1 !important;
        transform: none !important;
    }
}

/* Class-based reduced motion (set by JS) */
.reduced-motion .stats-card,
.reduced-motion .stats-card.js-animate {
    opacity: 1 !important;
    transform: none !important;
}

/* ==========================================================================
   Features Section Animation States
   ========================================================================== */

/* Features section CLS prevention - reserve space */
.features,
.features-section {
    min-height: 100vh;
}

.features-grid {
    min-height: 400px;
}

/* Feature card initial state for animation
   GSAP will set the initial state via fromTo() in Story 4.2-4.3 */
.feature-card.js-animate {
    opacity: 0;
    transform: translateY(20px);
}

/* Reduced motion fallback - ensure feature cards are visible */
@media (prefers-reduced-motion: reduce) {
    .feature-card,
    .feature-card.js-animate {
        opacity: 1 !important;
        transform: none !important;
    }
}

/* Class-based reduced motion (set by JS) */
.reduced-motion .feature-card,
.reduced-motion .feature-card.js-animate {
    opacity: 1 !important;
    transform: none !important;
}