/* ============================================
   ANIMATIONS — Keyframes, Reveals, Transitions
   rolandmantama.ch
   ============================================ */

/* --- Scroll Reveal --- */
[data-reveal] {
    opacity: 0;
    transform: translateY(30px);
    transition:
        opacity var(--transition-slow),
        transform var(--transition-slow);
}

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

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

[data-reveal="scale"] {
    transform: scale(0.95);
}

[data-reveal].is-visible {
    opacity: 1;
    transform: translateY(0) translateX(0) scale(1);
}

/* Stagger delay */
[data-reveal][data-delay="1"] { transition-delay: 100ms; }
[data-reveal][data-delay="2"] { transition-delay: 200ms; }
[data-reveal][data-delay="3"] { transition-delay: 300ms; }
[data-reveal][data-delay="4"] { transition-delay: 400ms; }
[data-reveal][data-delay="5"] { transition-delay: 500ms; }

/* --- Scroll Progress Bar --- */
.scroll-progress {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 3px;
    z-index: 1001;
    background: transparent;
}

.scroll-progress__bar {
    height: 100%;
    background: var(--color-accent);
    transform-origin: left;
    transform: scaleX(0);
    transition: transform 100ms linear;
}

/* --- Keyframes --- */
@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

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

@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

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

/* --- Gradient & Glow Keyframes --- */
@keyframes gradientShift {
    0% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
    100% { background-position: 0% 50%; }
}

@keyframes glowPulse {
    0%, 100% { box-shadow: 0 0 20px var(--color-accent-glow); }
    50% { box-shadow: 0 0 40px var(--color-accent-glow), 0 0 80px rgba(14, 165, 233, 0.1); }
}

@keyframes textShimmer {
    0% { background-position: -200% center; }
    100% { background-position: 200% center; }
}

@keyframes floatEnhanced {
    0%, 100% { transform: translateY(0) rotate(0deg); }
    25% { transform: translateY(-8px) rotate(1deg); }
    75% { transform: translateY(4px) rotate(-1deg); }
}

/* --- Gradient Text Utility --- */
.u-gradient-text {
    background: var(--gradient-primary);
    background-size: 200% auto;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: textShimmer 4s linear infinite;
}

/* --- Animated Border Gradient Utility --- */
.u-border-gradient {
    position: relative;
    border: none !important;
}
.u-border-gradient::before {
    content: '';
    position: absolute;
    inset: 0;
    padding: 1px;
    border-radius: inherit;
    background: var(--gradient-primary);
    background-size: 200% 200%;
    animation: gradientShift 6s ease infinite;
    -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
    -webkit-mask-composite: xor;
    mask-composite: exclude;
    pointer-events: none;
    z-index: 0;
}

/* --- Hero Scroll Indicator --- */
.hero__scroll-indicator {
    position: absolute;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%);
}

.hero__scroll-line {
    display: block;
    width: 1px;
    height: 60px;
    background: linear-gradient(to bottom, var(--color-accent), transparent);
    animation: scrollPulse 2s ease-in-out infinite;
}

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

/* --- Reduced Motion --- */
@media (prefers-reduced-motion: reduce) {
    [data-reveal] {
        opacity: 1;
        transform: none;
        transition: none;
    }

    .hero__scroll-line {
        animation: none;
    }

    .scroll-progress__bar {
        transition: none;
    }
}

/* --- Preloader --- */
.preloader {
    position: fixed;
    inset: 0;
    z-index: 9999;
    background: var(--color-bg-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: opacity 0.5s, visibility 0.5s;
}

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

.preloader__content {
    text-align: center;
}

.preloader__logo {
    font-family: var(--font-display);
    font-size: var(--text-4xl);
    font-weight: 900;
    color: var(--color-accent);
    margin-bottom: var(--space-xl);
    letter-spacing: -0.03em;
}

.preloader__code {
    font-family: var(--font-mono);
    font-size: var(--text-sm);
    color: var(--color-text-muted);
    text-align: left;
    margin-bottom: var(--space-xl);
}

.preloader__line {
    display: block;
    animation: fadeInUp 0.5s ease forwards;
    opacity: 0;
}

.preloader__line:nth-child(1) { animation-delay: 0.1s; }
.preloader__line:nth-child(2) { animation-delay: 0.3s; }
.preloader__line:nth-child(3) { animation-delay: 0.5s; }

.preloader__accent {
    color: var(--color-accent);
}

.preloader__bar {
    width: 200px;
    height: 3px;
    background: var(--color-bg-tertiary);
    border-radius: var(--radius-full);
    overflow: hidden;
}

.preloader__bar-fill {
    height: 100%;
    width: 0;
    background: var(--color-accent);
    border-radius: var(--radius-full);
    animation: preloaderFill 1.5s 0.7s ease forwards;
}

@keyframes preloaderFill {
    to { width: 100%; }
}

/* --- Custom Cursor (disabled — using native cursor) --- */

/* --- Card Glow on Hover --- */
.card,
.service-card,
.project-card,
.skills__category {
    position: relative;
    overflow: hidden;
}

.card::before,
.service-card::before,
.project-card::before,
.skills__category::before {
    content: '';
    position: absolute;
    top: var(--glow-y, 50%);
    left: var(--glow-x, 50%);
    width: 300px;
    height: 300px;
    background: radial-gradient(circle, var(--color-accent-glow) 0%, transparent 70%);
    transform: translate(-50%, -50%);
    opacity: 0;
    transition: opacity var(--transition-normal);
    pointer-events: none;
    z-index: 0;
}

.card:hover::before,
.service-card:hover::before,
.project-card:hover::before,
.skills__category:hover::before {
    opacity: 1;
}

.card > *,
.service-card > *,
.project-card > *,
.skills__category > * {
    position: relative;
    z-index: 1;
}