/* ==========================================
   PROFESSIONAL ANIMATIONS & TRANSITIONS
   Enhanced UX & Visual Polish
   ========================================== */

/* ---------- Scroll-Reveal Animations ---------- */
[data-reveal] {
    opacity: 0;
    transform: translateY(40px);
    transition: opacity 0.8s cubic-bezier(0.16, 1, 0.3, 1),
                transform 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}

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

[data-reveal="left"] {
    transform: translateX(-60px);
}

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

[data-reveal="right"] {
    transform: translateX(60px);
}

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

[data-reveal="scale"] {
    transform: scale(0.85);
}

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

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

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

/* Staggered children */
[data-reveal-stagger] > * {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s cubic-bezier(0.16, 1, 0.3, 1),
                transform 0.6s 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: 0.12s; }
[data-reveal-stagger].revealed > *:nth-child(3) { transition-delay: 0.19s; }
[data-reveal-stagger].revealed > *:nth-child(4) { transition-delay: 0.26s; }
[data-reveal-stagger].revealed > *:nth-child(5) { transition-delay: 0.33s; }
[data-reveal-stagger].revealed > *:nth-child(6) { transition-delay: 0.40s; }
[data-reveal-stagger].revealed > *:nth-child(7) { transition-delay: 0.47s; }
[data-reveal-stagger].revealed > *:nth-child(8) { transition-delay: 0.54s; }

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

/* ---------- Hero Enhancements ---------- */
.hero::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 120px;
    background: linear-gradient(to top, var(--bg-white) 0%, transparent 100%);
    z-index: 1;
    pointer-events: none;
}

.hero-content {
    position: relative;
    z-index: 2;
}

.hero-subtitle {
    display: inline-block;
    background: rgba(194, 155, 74, 0.15);
    border: 1px solid rgba(194, 155, 74, 0.3);
    padding: 0.4rem 1.5rem;
    border-radius: 50px;
    font-style: normal;
    font-size: 0.88rem;
    letter-spacing: 2.5px;
    text-transform: uppercase;
    -webkit-backdrop-filter: blur(8px);
    backdrop-filter: blur(8px);
}

.hero-title {
    text-shadow: 0 2px 40px rgba(0, 0, 0, 0.3);
}

.hero-tagline {
    background: rgba(255, 255, 255, 0.08);
    padding: 1rem 1.5rem;
    border-radius: 12px;
    border-left: 3px solid var(--accent-gold);
    -webkit-backdrop-filter: blur(6px);
    backdrop-filter: blur(6px);
}

/* ---------- Section Dividers ---------- */
.letter-section,
.updates-section,
.partners-logos-section {
    position: relative;
}

/* ---------- Smooth Parallax-lite ---------- */
@media (prefers-reduced-motion: no-preference) {
    .hero-slide {
        transition: opacity 2s ease-in-out;
    }

    .hero-slide.zoom {
        animation: heroZoomPan 10s ease-out forwards;
    }

    @keyframes heroZoomPan {
        0% {
            transform: scale(1) translate(0, 0);
        }
        100% {
            transform: scale(1.12) translate(-1%, -1%);
        }
    }
}

/* ---------- Navbar Enhancements ---------- */
.navbar {
    transition: background-color 0.4s cubic-bezier(0.16, 1, 0.3, 1),
                box-shadow 0.4s cubic-bezier(0.16, 1, 0.3, 1),
                backdrop-filter 0.4s ease;
}

.navbar.scrolled {
    background-color: rgba(255, 255, 255, 0.92);
    box-shadow: 0 1px 30px rgba(0, 0, 0, 0.07);
    -webkit-backdrop-filter: blur(20px);
    backdrop-filter: blur(20px);
}

.hamburger span {
    transition: all 0.35s cubic-bezier(0.68, -0.55, 0.27, 1.55);
}

.hamburger.active span:nth-child(1) {
    transform: translateY(8px) rotate(45deg);
}

.hamburger.active span:nth-child(2) {
    opacity: 0;
    transform: scaleX(0);
}

.hamburger.active span:nth-child(3) {
    transform: translateY(-8px) rotate(-45deg);
}

/* ---------- Speaker Section Enhancements ---------- */
.speakers-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(194, 155, 74, 0.4), transparent);
}

.speakers-section::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(194, 155, 74, 0.4), transparent);
}

.speaker-card-inner {
    transition: transform 0.5s cubic-bezier(0.16, 1, 0.3, 1),
                box-shadow 0.5s cubic-bezier(0.16, 1, 0.3, 1),
                border-color 0.5s ease;
}

.speaker-card-inner:hover {
    transform: translateY(-10px) scale(1.02);
    box-shadow:
        0 25px 60px rgba(0, 0, 0, 0.4),
        0 0 40px rgba(74, 144, 194, 0.12),
        inset 0 1px 0 rgba(255, 255, 255, 0.1);
}

.speaker-img {
    transition: transform 0.8s cubic-bezier(0.16, 1, 0.3, 1),
                filter 0.5s ease;
}

.speaker-card-inner:hover .speaker-img {
    transform: scale(1.08);
}

/* Speaker name glow on hover */
.speaker-card-inner:hover .speaker-name {
    text-shadow: 0 0 20px rgba(194, 155, 74, 0.3);
}

/* ---------- Letter Section Polish ---------- */
.letter-section .section-title {
    position: relative;
}

.letter-section .section-title::after {
    transition: width 0.6s cubic-bezier(0.16, 1, 0.3, 1);
    width: 80px;
}

.letter-section:hover .section-title::after {
    width: 120px;
}

.director-photo-card {
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
}

.director-photo-card:hover {
    transform: none !important;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.08) !important;
}

.director-img {
    display: block;
    width: 100%;
}

.director-photo-card:hover .director-img {
    transform: none;
}

/* ---------- Partners Section Polish ---------- */
.partners-logos-section .partner-card {
    transition: transform 0.4s cubic-bezier(0.16, 1, 0.3, 1),
                box-shadow 0.4s cubic-bezier(0.16, 1, 0.3, 1),
                border-color 0.4s ease !important;
}

.partners-logos-section .partner-card:hover {
    transform: translateY(-4px) !important;
    box-shadow: 0 12px 30px rgba(0, 0, 0, 0.08) !important;
    border-color: rgba(26, 58, 92, 0.15) !important;
}

.partner-logo-img {
    transition: transform 0.4s cubic-bezier(0.16, 1, 0.3, 1) !important;
}

.partner-card:hover .partner-logo-img {
    transform: scale(1.08);
}

/* ---------- Updates Section Enhancement ---------- */
.updates-section {
    background: linear-gradient(135deg, #f0f4f8 0%, #e8eef3 100%);
    position: relative;
    overflow: hidden;
}

.updates-section::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 500px;
    height: 500px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(26, 58, 92, 0.04) 0%, transparent 70%);
    pointer-events: none;
}

.updates-form input {
    border-radius: 50px;
    padding: 1rem 1.5rem;
    border: 2px solid rgba(26, 58, 92, 0.15);
    transition: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
    font-size: 0.95rem;
}

.updates-form input:focus {
    border-color: var(--primary-blue);
    box-shadow: 0 0 0 4px rgba(26, 58, 92, 0.08);
    transform: translateY(-1px);
}

.updates-form .btn-primary {
    border-radius: 50px;
    padding: 1rem 2.5rem;
    font-weight: 600;
    letter-spacing: 1px;
}

/* ---------- Footer Enhancement ---------- */
.footer {
    position: relative;
    overflow: hidden;
}

.footer-social a {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 42px;
    height: 42px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.08);
    border: 1px solid rgba(255, 255, 255, 0.12);
    transition: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

.footer-social a:hover {
    background: rgba(194, 155, 74, 0.2);
    border-color: rgba(194, 155, 74, 0.4);
    transform: translateY(-4px) scale(1.1);
    color: var(--accent-gold);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.2);
}

/* ---------- Subscribe Modal Enhancement ---------- */
.subscribe-modal-overlay {
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.4s ease, visibility 0.4s ease;
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.6);
    -webkit-backdrop-filter: blur(8px);
    backdrop-filter: blur(8px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
}

.subscribe-modal-overlay.is-open {
    opacity: 1;
    visibility: visible;
}

.subscribe-modal {
    background: white;
    border-radius: 20px;
    padding: 2.5rem;
    max-width: 420px;
    width: 90%;
    box-shadow: 0 25px 80px rgba(0, 0, 0, 0.25);
    transform: scale(0.9) translateY(20px);
    transition: transform 0.5s cubic-bezier(0.16, 1, 0.3, 1);
    position: relative;
}

.subscribe-modal-overlay.is-open .subscribe-modal {
    transform: scale(1) translateY(0);
}

.subscribe-modal-icon {
    font-size: 3rem;
    color: #28a745;
    margin-bottom: 1rem;
}

.subscribe-modal-close {
    position: absolute;
    top: 1rem;
    right: 1rem;
    background: none;
    border: none;
    font-size: 1.5rem;
    color: var(--text-light);
    cursor: pointer;
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    transition: all 0.3s ease;
}

.subscribe-modal-close:hover {
    background: var(--bg-light);
    color: var(--text-dark);
}

.subscribe-modal-title {
    font-family: var(--font-serif);
    font-size: 1.5rem;
    color: var(--primary-blue);
    margin-bottom: 0.5rem;
}

.subscribe-modal-message {
    color: var(--text-light);
    margin-bottom: 1.5rem;
}

.subscribe-modal-ok {
    min-width: 120px;
    cursor: pointer;
}

/* ---------- Custom Cursor Glow (Desktop) ---------- */
@media (hover: hover) and (pointer: fine) {
    .speaker-card-inner,
    .director-photo-card,
    .partner-card {
        cursor: pointer;
    }
}

/* ---------- Button Micro-Interactions ---------- */
.btn-primary,
.btn-secondary,
.btn-outline {
    position: relative;
    overflow: hidden;
}

.btn-primary::before,
.btn-secondary::before,
.btn-outline::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    background: rgba(255, 255, 255, 0.15);
    border-radius: 50%;
    transform: translate(-50%, -50%);
    transition: width 0.6s ease, height 0.6s ease;
}

.btn-primary:hover::before,
.btn-secondary:hover::before,
.btn-outline:hover::before {
    width: 300px;
    height: 300px;
}

/* ---------- Smooth Loading ---------- */
.page-loaded .hero-content {
    animation: heroEntrance 1.2s cubic-bezier(0.16, 1, 0.3, 1) both;
}

@keyframes heroEntrance {
    from {
        opacity: 0;
        transform: translateY(50px) scale(0.96);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

/* ---------- Logo Intro Enhancement ---------- */
.logo-intro {
    position: fixed;
    inset: 0;
    background: #ffffff;
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 99999;
    transition: opacity 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}

.logo-intro.fade-out {
    opacity: 0;
}

.intro-logo {
    width: 180px;
    height: auto;
    animation: introLogoAnim 2.5s cubic-bezier(0.16, 1, 0.3, 1) both;
}

@keyframes introLogoAnim {
    0% {
        opacity: 0;
        transform: scale(0.5) rotate(-5deg);
        filter: blur(10px);
    }
    50% {
        opacity: 1;
        transform: scale(1.05) rotate(0deg);
        filter: blur(0);
    }
    100% {
        opacity: 1;
        transform: scale(1) rotate(0deg);
        filter: blur(0);
    }
}

/* ---------- Reduced Motion ---------- */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }

    [data-reveal] {
        opacity: 1;
        transform: none;
    }

    [data-reveal-stagger] > * {
        opacity: 1;
        transform: none;
    }
}

/* ---------- Smooth Typography ---------- */
.speakers-section-title,
.section-title,
.hero-title {
    word-spacing: 2px;
}

/* ---------- Mobile Menu Enhancement ---------- */
@media (max-width: 768px) {
    .nav-menu {
        transition: left 0.4s cubic-bezier(0.16, 1, 0.3, 1);
        -webkit-backdrop-filter: blur(20px);
        backdrop-filter: blur(20px);
        background-color: rgba(255, 255, 255, 0.98);
    }

    .nav-menu a {
        transition: color 0.3s ease, transform 0.3s ease;
    }

    .nav-menu a:active {
        transform: scale(0.97);
    }
}

/* ---------- Custom Scrollbar ---------- */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: var(--bg-light);
}

::-webkit-scrollbar-thumb {
    background: linear-gradient(180deg, var(--primary-blue-light), var(--primary-blue));
    border-radius: 10px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--primary-blue-dark);
}

/* Firefox */
html {
    scrollbar-width: thin;
    scrollbar-color: var(--primary-blue) var(--bg-light);
}

/* ---------- Section Transitions ---------- */
section {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 1.2s cubic-bezier(0.16, 1, 0.3, 1), 
                transform 1.2s cubic-bezier(0.16, 1, 0.3, 1);
}

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

/* ---------- Selection Styling ---------- */
::selection {
    background: rgba(26, 58, 92, 0.2);
    color: var(--primary-blue-dark);
}

/* ---------- Focus Visible (Accessibility) ---------- */
:focus-visible {
    outline: 2px solid var(--accent-gold);
    outline-offset: 3px;
    border-radius: 4px;
}

button:focus:not(:focus-visible),
a:focus:not(:focus-visible) {
    outline: none;
}