/* ===========================
   Font Face & Typography System
   =========================== */

@font-face {
    font-family: 'Apfel Grotezk';
    src: url('../fonts/ApfelGrotezk-Regular.woff2') format('woff2'),
         url('../fonts/ApfelGrotezk-Regular.woff') format('woff');
    font-weight: 400;
    font-style: normal;
    font-display: swap;
}

:root {
    /* 8px Grid System */
    --grid: 8px;

    /* Typography Scale (1.25 ratio) */
    --font-xs: 12.8px;
    --font-sm: 16px;
    --font-base: 20px;
    --font-md: 25px;
    --font-lg: 31.2px;
    --font-xl: 39px;
    --font-2xl: 48.8px;
    --font-hero: 61px;

    /* Line Height & Letter Spacing */
    --line-height: 115%;
    --letter-spacing: -0.02em;

    /* Colors */
    --color-cream: #F5F5F3;
    --color-black: #0A0A0A;
    --color-yellow: #F4D35E;
    --color-dark-blue: #2C4A62;
    --color-white: #FFFFFF;
    --color-gray: #8A8A8A;

    /* Spacing (8px grid) */
    --space-1: 8px;
    --space-2: 16px;
    --space-3: 24px;
    --space-4: 32px;
    --space-5: 40px;
    --space-6: 48px;
    --space-8: 64px;
    --space-10: 80px;
    --space-12: 96px;
    --space-16: 128px;

    /* Transitions */
    --ease-smooth: cubic-bezier(0.4, 0, 0.2, 1);
    --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
}

/* ===========================
   Reset & Base Styles
   =========================== */

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    font-size: 16px;
    scroll-behavior: smooth;
    overflow-y: scroll;
}

body {
    font-family: 'Apfel Grotezk', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background: var(--color-cream);
    color: var(--color-black);
    line-height: var(--line-height);
    letter-spacing: var(--letter-spacing);
    overflow-x: hidden;
    position: relative;
    cursor: url('../assets/cursor-medium.svg'), auto;
}

button, a, .carousel-nav, .carousel-dot, .modal-nav, .expand-button, .collapse-button, .cta-button {
    cursor: url('../assets/pointer.svg') 15 8, auto !important;
}

.right-brain, .right-brain *, #rightExpanded, #rightExpanded *, .modal, .modal *, .footer, .footer * {
    cursor: url('../assets/cursor-medium-white.svg'), auto !important;
}

.right-brain button, .right-brain a, #rightExpanded button, #rightExpanded a, .modal button, .modal a,
.right-brain .carousel-nav, #rightExpanded .carousel-nav, .modal .carousel-nav,
.right-brain .carousel-dot, #rightExpanded .carousel-dot, .modal .carousel-dot,
.right-brain .modal-nav, .modal .modal-nav,
.right-brain .expand-button, .right-brain .collapse-button,
.footer button, .footer a, .footer .nav-link {
    cursor: url('../assets/pointer.svg') 15 8, auto !important;
}

h1, h2, h3, h4, h5, h6 {
    line-height: var(--line-height);
    letter-spacing: var(--letter-spacing);
}

button {
    font-family: inherit;
    cursor: pointer;
    border: none;
    background: none;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

a {
    color: inherit;
    text-decoration: none;
}

/* ===========================
   Header
   =========================== */

.header {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--space-4) var(--space-6);
    z-index: 1000;
    background: transparent;
}

.header-logo {
    font-size: var(--font-lg);
    font-weight: 400;
}

.header-nav {
    display: flex;
    gap: var(--space-4);
}

.nav-link {
    font-size: var(--font-base);
    text-decoration: underline;
    transition: opacity 0.3s var(--ease-smooth);
}

.nav-link:hover {
    opacity: 0.6;
}

/* ===========================
   Hero Section
   =========================== */

.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-8) var(--space-6);
    background: var(--color-cream);
}

.hero-content {
    max-width: 1200px;
    text-align: center;
}

.hero-title {
    font-size: var(--font-hero);
    font-weight: 400;
    margin-bottom: var(--space-6);
}

.wave {
    display: inline-block;
    transform-origin: 70% 70%;
}

/* Keep wave and exclamation together with team */
.no-break {
    white-space: nowrap;
    display: inline-block;
}

.hero-subtitle {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    margin-bottom: var(--space-8);
    font-size: var(--font-base);
}

.hero-profile {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    object-fit: cover;
}

.cta-button {
    background: var(--color-yellow);
    color: var(--color-black);
    font-size: var(--font-base);
    padding: var(--space-2) var(--space-5);
    border-radius: calc(var(--space-1) / 2);
}

.cta-button:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 16px rgba(0, 0, 0, 0.1);
}

.cta-button:active {
    transform: translateY(0);
}

/* ===========================
   Split Brain Section
   =========================== */

.split-brain {
    min-height: 100vh;
    display: flex;
    position: relative;
    overflow-x: hidden;
    width: 100%;
    background: var(--color-cream);
}

.brain-half {
    flex: 1;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    padding: var(--space-8) var(--space-6);
    position: relative;
    width: 50%;
}

.left-brain {
    background: var(--color-cream);
}

.right-brain {
    background: var(--color-black);
    color: var(--color-white);
}

.brain-label {
    font-size: var(--font-base);
    margin-bottom: 40px;
}

.right-brain .brain-content {
    text-align: right;
}

.right-brain .brain-label {
    text-align: right;
}

.right-brain .expand-button,
.right-brain .collapse-button {
    margin-left: auto;
}

.brain-content {
    max-width: 600px;
}

.collapse-button {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    font-size: var(--font-base);
    padding: var(--space-2) var(--space-4);
    border-radius: calc(var(--space-1) / 2);
    transition: all 0.3s var(--ease-smooth);
}

.collapse-button:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 16px rgba(0, 0, 0, 0.1);
}

/* Left brain collapse button - black background, yellow text */
#collapseLeft {
    background: var(--color-black);
    color: var(--color-yellow);
}

/* Right brain collapse button - white background, black text */
#collapseRight {
    background: var(--color-white);
    color: var(--color-black);
}

.brain-half.expanded .collapse-button {
    display: flex;
}

.brain-title {
    font-size: var(--font-hero);
    font-weight: 400;
    margin-bottom: 311px;
}

.expand-button {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    background: var(--color-yellow);
    color: var(--color-black);
    font-size: var(--font-base);
    padding: var(--space-2) var(--space-4);
    border-radius: calc(var(--space-1) / 2);
    transition: all 0.3s var(--ease-smooth);
}

.expand-button:hover {
    transform: translateX(4px);
}

.right-brain .expand-button:hover {
    transform: translateX(-4px);
}

.arrow {
    font-size: var(--font-md);
    transition: transform 0.3s var(--ease-smooth);
}

/* Expanded Content (hidden in split view) */
.expanded-content {
    display: none;
    position: absolute;
    top: 0;
    right: 0;
    width: 50%;
    height: 100%;
    padding: var(--space-8) var(--space-6);
    align-items: center;
    justify-content: center;
    background: var(--color-cream);
}

#rightExpanded {
    left: 0;
    right: auto;
    background: var(--color-black);
}

.brain-half {
    position: relative;
    overflow: hidden;
}

/* ===========================
   Carousel
   =========================== */

.carousel {
    position: relative;
    padding: 0;
    width: 100%;
    max-width: 600px;
    margin: 0 auto;
}

.carousel-track {
    position: relative;
    overflow: visible;
    transition: height 0.4s ease;
    width: 100%;
}

.carousel-slide {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    opacity: 0;
    pointer-events: none;
    visibility: hidden;
}

.carousel-slide.active {
    opacity: 1;
    pointer-events: auto;
    visibility: visible;
}

.carousel-nav {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: 48px;
    height: 48px;
    background: var(--color-yellow);
    color: var(--color-black);
    border-radius: 50%;
    font-size: var(--font-xl);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 10;
    transition: all 0.3s var(--ease-smooth);
}

.carousel-nav:hover {
    transform: translateY(-50%) scale(1.1);
}

.carousel-nav.prev {
    left: -24px;
}

.carousel-nav.next {
    right: -24px;
}

.carousel-dots {
    display: flex;
    gap: var(--space-1);
    justify-content: center;
    margin-top: 0;
    padding: var(--space-2) 0;
}

.carousel-dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: var(--color-gray);
    cursor: pointer;
    transition: all 0.3s var(--ease-smooth);
}

.carousel-dot.active {
    background: var(--color-black);
    transform: scale(1.2);
}

#rightExpanded .carousel-dot {
    background: rgba(255, 255, 255, 0.5);
}

#rightExpanded .carousel-dot.active {
    background: var(--color-white);
}

/* ===========================
   Project Cards
   =========================== */

.project-card {
    background: var(--color-white);
    padding: var(--space-6);
    border-radius: var(--space-2);
    width: 100%;
    box-sizing: border-box;
}

.project-card.analytical {
    background: var(--color-white);
}

.project-card.creative {
    background: var(--color-black);
    color: var(--color-white);
}

.card-header {
    margin-bottom: var(--space-3);
}

.card-tag {
    font-size: var(--font-xs);
    background: var(--color-dark-blue);
    color: var(--color-white);
    padding: var(--space-1) var(--space-2);
    border-radius: calc(var(--space-1) / 2);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.card-title {
    font-size: var(--font-lg);
    font-weight: 400;
    margin-bottom: var(--space-2);
}

.card-date {
    font-size: var(--font-sm);
    color: var(--color-gray);
    margin-bottom: var(--space-3);
}

.card-description {
    font-size: var(--font-base);
    line-height: 140%;
}

.project-preview {
    margin-bottom: var(--space-4);
    border-radius: var(--space-2);
    overflow: hidden;
}

.project-image {
    width: 100%;
    height: auto;
    display: block;
}

.project-card.creative .project-image {
    max-width: 100%;
    margin: 0 auto;
}

.project-description {
    font-size: var(--font-base);
    line-height: 140%;
    text-align: center;
}

/* ===========================
   Final CTA Section
   =========================== */

.final-cta {
    min-height: 60vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: var(--space-12) var(--space-6);
    background: var(--color-cream);
    text-align: center;
}

.final-title {
    font-size: var(--font-hero);
    font-weight: 400;
    margin-bottom: var(--space-8);
}

/* ===========================
   Footer
   =========================== */

.footer {
    background: var(--color-black);
    color: var(--color-white);
    padding: var(--space-8) var(--space-6);
    position: relative;
    overflow: hidden;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    position: relative;
    z-index: 10;
    margin-bottom: var(--space-4);
}

.footer-logo {
    font-size: var(--font-lg);
}

.footer-est {
    text-align: center;
    font-size: var(--font-sm);
    color: var(--color-white);
    position: relative;
    z-index: 10;
    margin-top: var(--space-4);
}

.footer-nav {
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
    font-size: var(--font-base);
}

.footer-nav a {
    text-decoration: underline;
    transition: opacity 0.3s var(--ease-smooth);
}

.footer-nav a:hover {
    opacity: 0.6;
}

.footer-bg-text {
    font-size: 200px;
    font-weight: 400;
    color: rgba(255, 255, 255, 0.05);
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    white-space: nowrap;
    pointer-events: none;
    z-index: 1;
}

/* ===========================
   Mobile/Desktop Content Visibility
   =========================== */

.mobile-only {
    display: none;
}

/* Desktop-only sections - no display override needed */

/* ===========================
   Mobile-Only Brain Sections
   =========================== */

.mobile-brain-section {
    background: var(--color-cream);
}

.mobile-brain-left,
.mobile-brain-right {
    padding: var(--space-8) var(--space-4);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    width: 100%;
}

.mobile-brain-left {
    background: var(--color-cream);
}

.mobile-brain-right {
    background: var(--color-black);
    color: var(--color-white);
}

.mobile-brain-label {
    font-size: var(--font-sm);
    margin-bottom: var(--space-3);
    opacity: 0;
    width: 100%;
}

.mobile-brain-label.animate {
    animation: fadeInUp 1.2s cubic-bezier(0.16, 1, 0.3, 1) forwards;
    animation-delay: 4.8s;
}

.mobile-brain-title {
    font-size: 38px;
    font-weight: 400;
    margin-bottom: var(--space-6);
    line-height: 1.2;
    width: 100%;
    max-width: 100%;
}

.mobile-brain-title .brain-word {
    display: inline-block;
    opacity: 0;
}

.mobile-brain-title .brain-word.animate {
    animation: brainWordFadeIn 0.6s cubic-bezier(0.16, 1, 0.3, 1) forwards;
    animation-delay: calc(var(--delay) * 0.27s);
}

.mobile-carousel {
    position: relative;
    padding: 0;
    width: 100%;
    margin: 0;
    opacity: 0;
}

.mobile-carousel.show {
    animation: fadeInUp 1.2s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

/* ===========================
   Mobile Warning Modal (Disabled)
   =========================== */

.mobile-warning-modal {
    display: none !important;
}

/* ===========================
   Responsive Design
   =========================== */

@media (max-width: 1024px) {
    /* Show mobile content, hide desktop content */
    .mobile-only {
        display: block !important;
    }

    .desktop-only {
        display: none !important;
    }

    /* Disable custom cursors on touch devices */
    body,
    button, a, .carousel-nav, .carousel-dot, .modal-nav,
    .expand-button, .collapse-button, .cta-button,
    .right-brain, .right-brain *, #rightExpanded, #rightExpanded *,
    .modal, .modal *, .footer, .footer * {
        cursor: auto !important;
    }

    /* Header adjustments */
    .header {
        padding: var(--space-3) var(--space-4);
    }

    .header-logo {
        font-size: var(--font-md);
    }

    .nav-link {
        font-size: var(--font-sm);
    }

    /* Hero section */
    .hero {
        padding: var(--space-6) var(--space-4);
        min-height: 90vh;
    }

    .hero-title {
        font-size: 32px;
        margin-bottom: var(--space-4);
    }

    .cta-button {
        font-size: var(--font-sm);
        padding: var(--space-2) var(--space-4);
    }

    /* Mobile brain sections styling */
    .mobile-brain-left,
    .mobile-brain-right {
        padding: var(--space-6) var(--space-4);
    }

    .mobile-brain-title {
        font-size: 32px;
        margin-bottom: 0;
    }

    /* Remove line breaks on mobile - let text flow naturally */
    .mobile-brain-title br {
        display: none;
    }

    /* Ensure mobile brain word animations work */
    .mobile-brain-title .brain-word {
        display: inline-block;
        opacity: 0;
    }

    .mobile-brain-title .brain-word.animate {
        animation: brainWordFadeIn 0.6s cubic-bezier(0.16, 1, 0.3, 1) forwards;
        animation-delay: calc(var(--delay) * 0.27s);
    }

    .mobile-carousel {
        margin-top: var(--space-3);
    }

    .mobile-carousel .carousel-track {
        margin-bottom: var(--space-2);
    }

    .mobile-carousel {
        position: relative;
        padding: 0;
        touch-action: pan-y;
    }

    .mobile-carousel .carousel-nav {
        display: none !important;
    }

    .mobile-carousel .carousel-track {
        touch-action: pan-x;
    }

    .mobile-carousel .carousel-dots {
        padding: var(--space-1) 0;
        margin-top: 0;
    }

    .mobile-carousel .carousel-dot {
        width: 10px;
        height: 10px;
    }

    /* Mobile right brain carousel - white elements */
    .mobile-brain-right .carousel-nav {
        background: var(--color-white);
        color: var(--color-black);
    }

    .mobile-brain-right .carousel-dot {
        background: rgba(255, 255, 255, 0.5);
    }

    .mobile-brain-right .carousel-dot.active {
        background: var(--color-white);
    }

    /* Carousel adjustments for mobile */
    .carousel {
        max-width: 100%;
        padding: 0;
    }

    .carousel-track {
        margin-bottom: var(--space-2);
    }

    .carousel-nav {
        width: 36px;
        height: 36px;
        font-size: var(--font-md);
    }

    .carousel-nav.prev {
        left: 4px;
    }

    .carousel-nav.next {
        right: 4px;
    }

    .carousel-dots {
        padding: var(--space-1) 0;
        margin-top: 0;
    }

    .carousel-dot {
        width: 10px;
        height: 10px;
    }

    /* Project cards */
    .project-card {
        padding: var(--space-3);
    }

    .card-title {
        font-size: var(--font-base);
        margin-bottom: var(--space-1);
    }

    .card-tag {
        font-size: 10px;
        padding: 4px 8px;
    }

    .card-header {
        margin-bottom: var(--space-2);
    }

    .card-date {
        font-size: var(--font-xs);
        margin-bottom: var(--space-2);
    }

    .card-description,
    .project-description {
        font-size: var(--font-sm);
        line-height: 1.4;
    }

    .project-preview {
        margin-bottom: var(--space-3);
    }

    /* Final CTA */
    .final-cta {
        padding: var(--space-8) var(--space-4);
        min-height: 50vh;
    }

    .final-title {
        font-size: 28px;
        margin-bottom: var(--space-6);
    }

    /* Footer */
    .footer {
        padding: var(--space-6) var(--space-4);
    }

    .footer-bg-text {
        font-size: 60px;
    }

    .footer-logo {
        font-size: var(--font-md);
    }

    .footer-nav {
        font-size: var(--font-sm);
    }

    /* Modal adjustments for mobile */
    .modal.active {
        padding: var(--space-4);
    }

    .modal-content {
        width: 100%;
        flex-direction: column;
    }

    .modal-image-container {
        height: 300px;
    }

    .modal-nav {
        position: absolute;
        top: 50%;
        transform: translateY(-50%);
    }

    .modal-nav.prev {
        left: var(--space-2);
    }

    .modal-nav.next {
        right: var(--space-2);
    }

    .modal-close {
        top: var(--space-3);
        right: var(--space-3);
        width: 44px;
        height: 44px;
    }
}

@media (max-width: 480px) {
    /* Extra small mobile adjustments */
    .hero-title {
        font-size: 24px;
    }

    .mobile-brain-title {
        font-size: 28px;
        margin-bottom: 0;
    }

    /* Remove line breaks on small mobile too */
    .mobile-brain-title br {
        display: none;
    }

    .mobile-brain-label {
        font-size: var(--font-xs);
    }

    .mobile-brain-left,
    .mobile-brain-right {
        padding: var(--space-5) var(--space-3);
    }

    .final-title {
        font-size: 20px;
    }

    .mobile-carousel {
        padding: 0;
    }

    .card-title {
        font-size: var(--font-sm);
    }

    .card-description,
    .project-description {
        font-size: var(--font-xs);
    }

    .modal-image-container {
        height: 250px;
    }

    .footer-bg-text {
        font-size: 40px;
    }
}

/* ===========================
   Modal
   =========================== */

.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 10000;
    background: rgba(10, 10, 10, 0.95);
    cursor: pointer;
}

.modal.active {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-8);
}

.modal-content {
    position: relative;
    max-width: 1200px;
    width: 90%;
    text-align: center;
    cursor: default;
    display: flex;
    align-items: center;
    gap: var(--space-4);
}

.modal-body {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.modal-image-container {
    position: relative;
    width: 100%;
    height: 500px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--space-4);
}

.modal-body img {
    max-width: 90%;
    max-height: 100%;
    height: auto;
    width: auto;
    border-radius: var(--space-2);
    object-fit: contain;
    position: absolute;
    opacity: 0;
    transition: opacity 0.6s ease;
}

.modal-body img.active {
    opacity: 1;
}

.modal-body img[src*="fikir_composite"] {
    border-radius: 0;
}

.modal-body img[src*="fikir_one"] {
    border-radius: 0;
}

.modal-body img[src*="fikir_two"] {
    border-radius: 0;
}

.modal-body p {
    color: var(--color-white);
    font-size: var(--font-base);
    line-height: 140%;
    text-align: center;
    max-width: 800px;
}

.modal-dots {
    display: flex;
    gap: var(--space-1);
    justify-content: center;
    margin-top: var(--space-3);
}

.modal-dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.3);
    cursor: pointer;
    transition: all 0.3s var(--ease-smooth);
}

.modal-dot.active {
    background: var(--color-white);
    transform: scale(1.2);
}

.modal-nav {
    width: 48px;
    height: 48px;
    background: var(--color-yellow);
    color: var(--color-black);
    border-radius: 50%;
    border: none;
    font-size: var(--font-xl);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.3s var(--ease-smooth);
    flex-shrink: 0;
}

.modal-nav:hover {
    transform: scale(1.1);
}

.modal-nav.hidden {
    opacity: 0;
    pointer-events: none;
}

.modal-close {
    position: fixed;
    top: var(--space-8);
    right: var(--space-8);
    width: 48px;
    height: 48px;
    background: var(--color-yellow);
    color: var(--color-black);
    border-radius: 50%;
    border: none;
    font-size: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.3s var(--ease-smooth);
    z-index: 10001;
    line-height: 1;
    padding: 0;
}

.modal-close:hover {
    transform: scale(1.1) rotate(90deg);
}

/* Hover effect on creative cards */
#rightExpanded .project-card.creative {
    transition: transform 0.3s var(--ease-smooth);
}

#rightExpanded .project-card.creative,
#rightExpanded .project-card.creative * {
    cursor: url('../assets/pointer.svg') 15 8, pointer !important;
}

#rightExpanded .project-card.creative:hover {
    transform: scale(1.02);
}

#rightExpanded .project-card.creative .project-image {
    transition: transform 0.3s var(--ease-smooth);
}

#rightExpanded .project-card.creative:hover .project-image {
    transform: scale(1.05);
}

/* ===========================
   CSS Animations (Replacing GSAP)
   =========================== */

/* Hero Section Animations */
.wave {
    animation: waveRotation 0.5s ease-in-out 3 alternate;
    animation-delay: 1.25s;
    transform-origin: 70% 70%;
}

@keyframes waveRotation {
    from {
        transform: rotate(0deg);
    }
    to {
        transform: rotate(20deg);
    }
}

.hero-title {
    line-height: 1.2;
}

.hero-title .word {
    display: inline-block;
    opacity: 0;
    animation: wordFadeIn 0.6s cubic-bezier(0.16, 1, 0.3, 1) forwards;
    animation-delay: calc(var(--delay) * 0.25s);
}

.hero-subtitle {
    animation: fadeInUp 1s cubic-bezier(0.16, 1, 0.3, 1) 0.3s forwards;
    opacity: 0;
}

.hero .cta-button {
    animation: fadeInUp 1s cubic-bezier(0.16, 1, 0.3, 1) 4.5s forwards;
    opacity: 0;
}

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

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

/* Split Brain Entrance Animations */
.brain-title .brain-word {
    display: inline-block;
    opacity: 0;
}

.brain-title .brain-word.animate {
    animation: brainWordFadeIn 0.6s cubic-bezier(0.16, 1, 0.3, 1) forwards;
    animation-delay: calc(var(--delay) * 0.27s);
}

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

.expand-button,
.brain-label {
    opacity: 0;
}

.expand-button.animate {
    animation: fadeInUp 1.2s cubic-bezier(0.16, 1, 0.3, 1) forwards;
    animation-delay: 4.8s;
}

.brain-label.animate {
    animation: fadeInUp 1.2s cubic-bezier(0.16, 1, 0.3, 1) forwards;
    animation-delay: 4.8s;
}

/* Brain Expansion Animations */
.brain-half {
    transition: transform 1.2s cubic-bezier(0.16, 1, 0.3, 1);
}

.brain-half.slide-out-left {
    transform: translateX(-100vw);
}

.brain-half.slide-out-right {
    transform: translateX(100vw);
}

.expanded-content {
    opacity: 0;
    transition: opacity 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

.expanded-content.visible {
    opacity: 1;
}

/* Carousel Animations */
.carousel-track {
    transition: height 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.carousel-slide {
    transition: opacity 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Button Hover Animations */
.cta-button {
    transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1),
                box-shadow 0.3s cubic-bezier(0.4, 0, 0.2, 1),
                scale 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.cta-button:hover {
    scale: 1.02;
}

.expand-button .arrow,
.collapse-button .arrow {
    transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.expand-button:hover .arrow {
    transform: translateX(8px);
}

#expandRight:hover .arrow,
#collapseRight:hover .arrow {
    transform: translateX(-8px);
}

/* Final CTA Section Animations */
.final-title,
.final-cta .cta-button {
    opacity: 0;
    transform: translateY(50px);
    transition: opacity 1s cubic-bezier(0.16, 1, 0.3, 1),
                transform 1s cubic-bezier(0.16, 1, 0.3, 1);
}

.final-title.animate-in {
    opacity: 1;
    transform: translateY(0);
}

.final-cta .cta-button.animate-in {
    opacity: 1;
    transform: translateY(0);
    transition-delay: 0.3s;
}

/* Footer Animations */
.footer-content {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.8s cubic-bezier(0.16, 1, 0.3, 1),
                transform 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}

.footer-bg-text {
    transform: translate(-50%, -50%) scale(0.95);
    transition: transform 1.2s cubic-bezier(0.16, 1, 0.3, 1);
}

.footer-content.animate-in {
    opacity: 1;
    transform: translateY(0);
}

.footer-bg-text.animate-in {
    transform: translate(-50%, -50%) scale(1);
}

/* ===========================
   Utility Classes
   =========================== */

.hidden {
    display: none !important;
}

.fade-in {
    animation: fadeIn 0.6s var(--ease-smooth);
}

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