/* ============================================================
   MGBT — MODERN GULF BRIDGE TRADING EST.
   Animations Stylesheet
   ============================================================ */

/* ============================================================
   1. REVEAL ANIMATIONS (Scroll-triggered)
   ============================================================ */

/* Base reveal class — elements start hidden and fade up */
.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.7s cubic-bezier(0.25, 0.46, 0.45, 0.94),
                transform 0.7s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

.reveal.visible {
    opacity: 1;
    transform: translateY(0);
}

/* Staggered delays for child elements */
.reveal-delay-1 {
    transition-delay: 0.1s;
}

.reveal-delay-2 {
    transition-delay: 0.2s;
}

.reveal-delay-3 {
    transition-delay: 0.3s;
}

.reveal-delay-4 {
    transition-delay: 0.4s;
}

.reveal-delay-5 {
    transition-delay: 0.5s;
}

/* ============================================================
   2. FADE ANIMATIONS
   ============================================================ */

.fade-in {
    opacity: 0;
    transition: opacity 0.6s ease;
}

.fade-in.visible {
    opacity: 1;
}

.fade-in-up {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in-up.visible {
    opacity: 1;
    transform: translateY(0);
}

.fade-in-down {
    opacity: 0;
    transform: translateY(-20px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in-down.visible {
    opacity: 1;
    transform: translateY(0);
}

.fade-in-left {
    opacity: 0;
    transform: translateX(-20px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in-left.visible {
    opacity: 1;
    transform: translateX(0);
}

.fade-in-right {
    opacity: 0;
    transform: translateX(20px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in-right.visible {
    opacity: 1;
    transform: translateX(0);
}

/* ============================================================
   3. SCALE ANIMATIONS
   ============================================================ */

.scale-in {
    opacity: 0;
    transform: scale(0.95);
    transition: opacity 0.5s ease, transform 0.5s ease;
}

.scale-in.visible {
    opacity: 1;
    transform: scale(1);
}

/* ============================================================
   4. HOVER ANIMATIONS (Interactive elements)
   ============================================================ */

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

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

/* Subtle scale on hover (buttons, icons) */
.hover-scale {
    transition: transform var(--transition-fast);
}

.hover-scale:hover {
    transform: scale(1.04);
}

.hover-scale:active {
    transform: scale(0.96);
}

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

.hover-glow:hover {
    border-color: var(--color-accent);
    box-shadow: 0 0 0 3px rgba(215, 25, 32, 0.08);
}

/* ============================================================
   5. LOADING / SKELETON ANIMATIONS
   ============================================================ */

/* Subtle pulse for loading states */
@keyframes pulse-subtle {
    0% {
        opacity: 1;
    }
    50% {
        opacity: 0.6;
    }
    100% {
        opacity: 1;
    }
}

.pulse-subtle {
    animation: pulse-subtle 1.8s ease-in-out infinite;
}

/* Skeleton loading shimmer */
@keyframes shimmer {
    0% {
        background-position: -200% 0;
    }
    100% {
        background-position: 200% 0;
    }
}

.skeleton {
    background: linear-gradient(90deg, var(--color-bg-alt) 25%, #e8eaed 50%, var(--color-bg-alt) 75%);
    background-size: 200% 100%;
    animation: shimmer 1.5s ease-in-out infinite;
    border-radius: var(--radius-sm);
}

/* ============================================================
   6. NAVIGATION ANIMATIONS
   ============================================================ */

/* Sticky header transition */
.site-header {
    transition: background var(--transition-normal),
                border-color var(--transition-normal),
                box-shadow var(--transition-normal);
}

/* Mobile menu slide-down */
@media (max-width: 991.98px) {
    .site-header .navbar-collapse {
        transform-origin: top center;
        animation: menuSlideDown 0.3s ease forwards;
    }

    @keyframes menuSlideDown {
        0% {
            opacity: 0;
            transform: scaleY(0.95) translateY(-8px);
        }
        100% {
            opacity: 1;
            transform: scaleY(1) translateY(0);
        }
    }
}

/* Hamburger icon animation (optional enhancement) */
.navbar-toggler[aria-expanded="true"] .navbar-toggler-icon {
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='24' height='24' viewBox='0 0 24 24' fill='none' stroke='%231A1A1A' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cline x1='18' y1='6' x2='6' y2='18'%3E%3C/line%3E%3Cline x1='6' y1='6' x2='18' y2='18'%3E%3C/line%3E%3C/svg%3E");
}

/* ============================================================
   7. HERO ANIMATIONS
   ============================================================ */

/* Hero content entrance */
.hero-content .hero-tagline {
    animation: fadeInUp 0.8s ease forwards;
}

.hero-content .hero-heading {
    animation: fadeInUp 0.8s ease 0.15s forwards;
    opacity: 0;
}

.hero-content .hero-subheading {
    animation: fadeInUp 0.8s ease 0.3s forwards;
    opacity: 0;
}

.hero-content .hero-actions {
    animation: fadeInUp 0.8s ease 0.45s forwards;
    opacity: 0;
}

.hero-visual {
    animation: fadeInRight 0.9s ease 0.3s forwards;
    opacity: 0;
}

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

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

/* Device mockup subtle float (optional) */
.device-mockup {
    animation: floatSubtle 6s ease-in-out infinite;
}

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

/* ============================================================
   8. FAQ ACCORDION ANIMATIONS
   ============================================================ */

.faq-answer {
    transition: max-height var(--transition-slow),
                padding var(--transition-slow),
                opacity var(--transition-slow);
}

.faq-answer[aria-expanded="true"] {
    max-height: 300px;
    padding: 0 var(--sp-24) var(--sp-20);
}

.faq-icon {
    transition: transform var(--transition-normal);
}

.faq-question[aria-expanded="true"] .faq-icon {
    transform: rotate(45deg);
}

/* ============================================================
   9. FORM ANIMATIONS
   ============================================================ */

/* Form field focus transition */
.form-control,
.form-select {
    transition: border-color var(--transition-fast),
                box-shadow var(--transition-fast);
}

/* Form status message slide-in */
.form-status {
    transition: opacity 0.4s ease, transform 0.4s ease;
    opacity: 0;
    transform: translateY(-8px);
}

.form-status.success,
.form-status.error {
    opacity: 1;
    transform: translateY(0);
}

/* ============================================================
   10. SCROLL INDICATOR (Hero)
   ============================================================ */

.scroll-indicator {
    position: absolute;
    bottom: var(--sp-32);
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--sp-8);
    color: var(--color-text-muted);
    font-size: 0.75rem;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    opacity: 0.6;
    animation: bounceDown 2s ease-in-out infinite;
}

.scroll-indicator .mouse {
    width: 20px;
    height: 32px;
    border: 2px solid var(--color-text-muted);
    border-radius: 10px;
    position: relative;
}

.scroll-indicator .mouse::after {
    content: '';
    position: absolute;
    top: 6px;
    left: 50%;
    transform: translateX(-50%);
    width: 3px;
    height: 8px;
    background: var(--color-accent);
    border-radius: 2px;
    animation: scrollWheel 1.5s ease-in-out infinite;
}

@keyframes scrollWheel {
    0% {
        opacity: 1;
        transform: translateX(-50%) translateY(0);
    }
    100% {
        opacity: 0;
        transform: translateX(-50%) translateY(12px);
    }
}

@keyframes bounceDown {
    0%,
    100% {
        transform: translateX(-50%) translateY(0);
    }
    50% {
        transform: translateX(-50%) translateY(4px);
    }
}

/* Hide scroll indicator on mobile */
@media (max-width: 767.98px) {
    .scroll-indicator {
        display: none;
    }
}

/* ============================================================
   11. COUNTER ANIMATIONS (for statistics)
   ============================================================ */

/* Number counter animation — numbers count up */
@keyframes countUp {
    from {
        opacity: 0.3;
    }
    to {
        opacity: 1;
    }
}

.stat-number {
    display: inline-block;
    animation: countUp 0.8s ease forwards;
}

/* ============================================================
   12. ACCESSIBILITY — prefers-reduced-motion
   ============================================================ */

@media (prefers-reduced-motion: reduce) {
    /* Disable all animations for users who prefer reduced motion */
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }

    /* Reset reveal classes to always visible */
    .reveal,
    .fade-in,
    .fade-in-up,
    .fade-in-down,
    .fade-in-left,
    .fade-in-right,
    .scale-in {
        opacity: 1 !important;
        transform: none !important;
        transition: none !important;
    }

    /* Disable hover animations */
    .hover-lift:hover {
        transform: none !important;
        box-shadow: var(--shadow-sm) !important;
    }

    .hover-scale:hover,
    .hover-scale:active {
        transform: none !important;
    }

    /* Disable float animation */
    .device-mockup {
        animation: none !important;
    }

    /* Disable scroll indicator animation */
    .scroll-indicator {
        animation: none !important;
    }

    .scroll-indicator .mouse::after {
        animation: none !important;
    }

    /* Disable mobile menu animation */
    .site-header .navbar-collapse {
        animation: none !important;
    }

    /* Disable form status animation */
    .form-status {
        transition: none !important;
    }

    /* Disable shimmer */
    .skeleton {
        animation: none !important;
        background: var(--color-bg-alt) !important;
    }
}

/* ============================================================
   13. REDUCED MOTION — Override for specific elements
   ============================================================ */

/* Elements that should always animate (except when reduced motion is on) */
.animate-once {
    animation-fill-mode: forwards;
}

.animate-once.finished {
    animation-play-state: paused;
}

/* ============================================================
   14. SCROLL-TRIGGERED CLASSES (to be applied by JS)
   ============================================================ */

/* Elements that become visible on scroll */
.scroll-reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.7s cubic-bezier(0.25, 0.46, 0.45, 0.94),
                transform 0.7s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

.scroll-reveal.is-visible {
    opacity: 1;
    transform: translateY(0);
}

/* Stagger children on scroll */
.scroll-reveal-stagger > * {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.scroll-reveal-stagger.is-visible > *:nth-child(1) { transition-delay: 0.05s; opacity: 1; transform: translateY(0); }
.scroll-reveal-stagger.is-visible > *:nth-child(2) { transition-delay: 0.10s; opacity: 1; transform: translateY(0); }
.scroll-reveal-stagger.is-visible > *:nth-child(3) { transition-delay: 0.15s; opacity: 1; transform: translateY(0); }
.scroll-reveal-stagger.is-visible > *:nth-child(4) { transition-delay: 0.20s; opacity: 1; transform: translateY(0); }
.scroll-reveal-stagger.is-visible > *:nth-child(5) { transition-delay: 0.25s; opacity: 1; transform: translateY(0); }
.scroll-reveal-stagger.is-visible > *:nth-child(6) { transition-delay: 0.30s; opacity: 1; transform: translateY(0); }