/* ═══════════════════════════════════════════════════════════════
   ANIMATIONS — Keyframes & Transition Classes
   Honor: Restrained elegance. Nothing flashy.
   ═══════════════════════════════════════════════════════════════ */

/* ─── KEYFRAMES ─── */

@keyframes fadeIn {
    from { opacity: 0; }
    to   { opacity: 1; }
}

@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(30px); }
    to   { opacity: 1; transform: translateY(0); }
}

@keyframes fadeInDown {
    from { opacity: 0; transform: translateY(-20px); }
    to   { opacity: 1; transform: translateY(0); }
}

@keyframes slideUp {
    from { transform: translateY(100%); }
    to   { transform: translateY(0); }
}

@keyframes letterReveal {
    0%   { opacity: 0; transform: translateY(100%) rotateX(-60deg); }
    100% { opacity: 1; transform: translateY(0) rotateX(0deg); }
}

@keyframes lineGrow {
    from { transform: scaleX(0); }
    to   { transform: scaleX(1); }
}

@keyframes pulseGlow {
    0%, 100% { opacity: 0.4; }
    50%      { opacity: 1; }
}

@keyframes scrollLine {
    0%   { transform: scaleY(0); transform-origin: top; }
    50%  { transform: scaleY(1); transform-origin: top; }
    50.1% { transform: scaleY(1); transform-origin: bottom; }
    100% { transform: scaleY(0); transform-origin: bottom; }
}

@keyframes gradientShift {
    0%   { background-position: 0% 50%; }
    50%  { background-position: 100% 50%; }
    100% { background-position: 0% 50%; }
}

/* ─── REVEAL CLASSES (triggered by GSAP) ─── */

.anim-reveal {
    opacity: 0;
    transform: translateY(30px);
    will-change: opacity, transform;
}

.anim-reveal.is-visible {
    opacity: 1;
    transform: translateY(0);
    transition: opacity var(--duration-slower) var(--ease-out-expo),
                transform var(--duration-slower) var(--ease-out-expo);
}

/* ─── LOADING ANIMATION ─── */

@keyframes loaderFallback {
    0%, 90% { opacity: 1; visibility: visible; }
    100%    { opacity: 0; visibility: hidden; }
}

.loader {
    position: fixed;
    inset: 0;
    z-index: var(--z-loader);
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-primary);
    transition: opacity 0.8s var(--ease-out-expo), visibility 0.8s;
    /* CSS failsafe: auto-hide after 4s even if JS fails */
    animation: loaderFallback 4s forwards;
}

.loader.is-hidden {
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
}

.loader__inner {
    text-align: center;
}

.loader__logo {
    display: flex;
    gap: 2px;
    justify-content: center;
    margin-bottom: var(--space-4);
    perspective: 600px;
}

.loader__letter {
    font-family: var(--font-heading);
    font-size: var(--fs-3xl);
    font-weight: var(--fw-light);
    color: var(--color-gold-500);
    letter-spacing: var(--ls-widest);
    display: inline-block;
    opacity: 0;
    transform: translateY(40px) rotateX(-60deg);
    animation: letterReveal 0.7s var(--ease-out-expo) forwards;
}

.loader__letter:nth-child(1) { animation-delay: 0.1s; }
.loader__letter:nth-child(2) { animation-delay: 0.17s; }
.loader__letter:nth-child(3) { animation-delay: 0.24s; }
.loader__letter:nth-child(4) { animation-delay: 0.31s; }
.loader__letter:nth-child(5) { animation-delay: 0.38s; }

.loader__bar {
    width: 160px;
    height: 1px;
    background: var(--border-color);
    overflow: hidden;
    margin: 0 auto;
}

.loader__subtitle {
    margin-top: var(--space-4);
    font-family: var(--font-body, sans-serif);
    font-size: var(--fs-md);
    font-weight: 500;
    color: #ffffff;
    letter-spacing: 0.1em;
    opacity: 0;
    animation: letterReveal 1s 0.8s forwards;
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 12px;
}

.loader__subtitle-separator {
    opacity: 0.5;
    font-weight: 300;
}

.loader__progress {
    height: 100%;
    width: 0%;
    background: var(--gradient-gold);
    transition: width 0.4s var(--ease-out-expo);
}