/* ============================================
   CODEX SOMNIORUM — ANIMATIONS & TRANSITIONS
   Scroll reveals, hover effects, ambient motion
   ============================================ */

/* ============================================
   SCROLL-TRIGGERED REVEAL SYSTEM
   Elements with [data-reveal] are hidden until
   they enter the viewport via IntersectionObserver
   ============================================ */

/* Base hidden state */
[data-reveal] {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.7s cubic-bezier(0.16, 1, 0.3, 1),
                transform 0.7s cubic-bezier(0.16, 1, 0.3, 1);
}

[data-reveal].revealed {
    opacity: 1;
    transform: translateY(0);
}

/* Reveal variants */
[data-reveal="fade-up"] {
    transform: translateY(40px);
}

[data-reveal="fade-down"] {
    transform: translateY(-30px);
}

[data-reveal="fade-left"] {
    transform: translateX(40px);
}

[data-reveal="fade-right"] {
    transform: translateX(-40px);
}

[data-reveal="fade-left"].revealed,
[data-reveal="fade-right"].revealed {
    transform: translateX(0);
}

[data-reveal="scale"] {
    transform: scale(0.9);
}

[data-reveal="scale"].revealed {
    transform: scale(1);
}

[data-reveal="fade"] {
    transform: none;
}

/* Stagger children — add data-reveal-stagger to parent */
[data-reveal-stagger] > * {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.5s cubic-bezier(0.16, 1, 0.3, 1),
                transform 0.5s cubic-bezier(0.16, 1, 0.3, 1);
}

[data-reveal-stagger].revealed > *:nth-child(1) { transition-delay: 0.05s; }
[data-reveal-stagger].revealed > *:nth-child(2) { transition-delay: 0.1s; }
[data-reveal-stagger].revealed > *:nth-child(3) { transition-delay: 0.15s; }
[data-reveal-stagger].revealed > *:nth-child(4) { transition-delay: 0.2s; }
[data-reveal-stagger].revealed > *:nth-child(5) { transition-delay: 0.25s; }
[data-reveal-stagger].revealed > *:nth-child(6) { transition-delay: 0.3s; }
[data-reveal-stagger].revealed > *:nth-child(7) { transition-delay: 0.35s; }
[data-reveal-stagger].revealed > *:nth-child(8) { transition-delay: 0.4s; }
[data-reveal-stagger].revealed > *:nth-child(9) { transition-delay: 0.45s; }
[data-reveal-stagger].revealed > *:nth-child(10) { transition-delay: 0.5s; }
[data-reveal-stagger].revealed > *:nth-child(11) { transition-delay: 0.55s; }
[data-reveal-stagger].revealed > *:nth-child(12) { transition-delay: 0.6s; }

[data-reveal-stagger].revealed > * {
    opacity: 1;
    transform: translateY(0);
}

/* ============================================
   PAGE LOAD ANIMATION
   ============================================ */
.page-enter {
    animation: pageEnter 0.6s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

@keyframes pageEnter {
    from {
        opacity: 0;
        transform: translateY(15px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ============================================
   HOVER EFFECTS
   ============================================ */

/* Lift on hover */
.hover-lift {
    transition: transform var(--transition-base), box-shadow var(--transition-base);
}

.hover-lift:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg);
}

/* Glow intensify on hover */
.hover-glow {
    transition: box-shadow var(--transition-base), border-color var(--transition-base);
}

.hover-glow:hover {
    box-shadow: var(--glow-cyan), var(--shadow-md);
    border-color: rgba(0, 240, 255, 0.2);
}

/* Scale on hover */
.hover-scale {
    transition: transform var(--transition-base);
}

.hover-scale:hover {
    transform: scale(1.03);
}

/* ============================================
   AMBIENT KEYFRAME ANIMATIONS
   ============================================ */

/* Gentle float */
@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-10px); }
}

.anim-float {
    animation: float 4s ease-in-out infinite;
}

/* Slow rotate */
@keyframes slowRotate {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

.anim-rotate {
    animation: slowRotate 30s linear infinite;
}

/* Pulse glow */
@keyframes pulseGlow {
    0%, 100% { opacity: 0.5; }
    50% { opacity: 1; }
}

.anim-pulse {
    animation: pulseGlow 3s ease-in-out infinite;
}

/* Shimmer (for loading states or decorative) */
@keyframes shimmer {
    0% { background-position: -200% 0; }
    100% { background-position: 200% 0; }
}

.anim-shimmer {
    background: linear-gradient(90deg,
        transparent 0%,
        rgba(0, 240, 255, 0.08) 50%,
        transparent 100%
    );
    background-size: 200% 100%;
    animation: shimmer 3s linear infinite;
}

/* Breathe (subtle scale) */
@keyframes breathe {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.02); }
}

.anim-breathe {
    animation: breathe 5s ease-in-out infinite;
}

/* Gradient shift for backgrounds */
@keyframes gradientShift {
    0% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
    100% { background-position: 0% 50%; }
}

.anim-gradient {
    background-size: 200% 200%;
    animation: gradientShift 8s ease-in-out infinite;
}

/* Ethereal glow for atmospheric elements */
@keyframes etherealGlow {
    0%, 100% {
        box-shadow: 0 0 20px rgba(0, 240, 255, 0.1), 0 0 40px rgba(181, 55, 242, 0.05);
    }
    50% {
        box-shadow: 0 0 30px rgba(0, 240, 255, 0.2), 0 0 60px rgba(181, 55, 242, 0.1);
    }
}

.anim-ethereal {
    animation: etherealGlow 4s ease-in-out infinite;
}

/* ============================================
   BUTTON ANIMATIONS
   ============================================ */

/* Ripple click effect */
@keyframes ripple {
    to {
        transform: scale(4);
        opacity: 0;
    }
}

/* Pulse border (CTA buttons) */
@keyframes pulseBorder {
    0% { box-shadow: 0 0 0 0 rgba(0, 240, 255, 0.4); }
    70% { box-shadow: 0 0 0 12px rgba(0, 240, 255, 0); }
    100% { box-shadow: 0 0 0 0 rgba(0, 240, 255, 0); }
}

.anim-pulse-border {
    animation: pulseBorder 2.5s infinite;
}

/* ============================================
   LINE DRAWING (for decorative borders)
   ============================================ */
@keyframes drawLine {
    from { width: 0; }
    to { width: 100%; }
}

.anim-draw-line {
    width: 0;
    height: 2px;
    background: var(--gradient-primary);
    animation: drawLine 1s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

/* ============================================
   COUNTER / NUMBER ANIMATION
   ============================================ */
@keyframes countUp {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

.anim-count {
    animation: countUp 0.5s ease-out forwards;
}

/* ============================================
   TRANSITIONS (apply to any element)
   ============================================ */
.transition-all {
    transition: all var(--transition-base);
}

.transition-fast {
    transition: all var(--transition-fast);
}

.transition-slow {
    transition: all var(--transition-slow);
}

.transition-spring {
    transition: all var(--transition-spring);
}

/* ============================================
   REDUCED MOTION
   ============================================ */
@media (prefers-reduced-motion: reduce) {
    [data-reveal] {
        opacity: 1;
        transform: none;
        transition: none;
    }
    
    [data-reveal-stagger] > * {
        opacity: 1;
        transform: none;
        transition: none;
    }

    .anim-float,
    .anim-rotate,
    .anim-pulse,
    .anim-shimmer,
    .anim-breathe,
    .anim-gradient,
    .anim-ethereal,
    .anim-pulse-border {
        animation: none;
    }

    .hover-lift:hover {
        transform: none;
    }

    .hover-scale:hover {
        transform: none;
    }

    .page-enter {
        animation: none;
    }
}