/* Welcome page styles - adapted to Material Design 3 */

body {
    font-family: 'Roboto', -apple-system, BlinkMacSystemFont, 'Segoe UI', Oxygen, Ubuntu, Cantarell, sans-serif;
    overflow-x: hidden;
    background: var(--md-sys-color-surface);
    color: var(--md-sys-color-on-surface);
}

.container {
    height: 250vh;
    position: relative;
}

.fixed-viewport {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    overflow: hidden;
}

.background-image {
    width: 100%;
    height: 100%;
    background-image: url('../assets/background.jpeg');
    background-size: cover;
    background-position: center;
    position: absolute;
    top: 0;
    left: 0;
    transition: all 0.8s cubic-bezier(0.2, 0, 0, 1);
    border-radius: var(--md-sys-shape-corner-none);
}

.background-image.shrink {
    width: 50%;
    height: 70%;
    top: 15%;
    left: 48%;
    border-radius: var(--md-sys-shape-corner-extra-large);
    box-shadow:
        var(--md-sys-elevation-3),
        inset 0 0 100px rgba(0, 0, 0, 0.4),
        inset 0 0 50px rgba(0, 0, 0, 0.3);
}

.mask {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background:
        radial-gradient(circle at 20% 50%, rgba(0, 0, 0, 0.5) 28%, transparent 30%),
        radial-gradient(circle at 20% 50%, transparent 30%, var(--md-sys-color-surface) 30%);
    transition: opacity 0.8s cubic-bezier(0.2, 0, 0, 1);
    pointer-events: none;
}

.mask.hidden {
    opacity: 0;
}

.welcome-text {
    position: absolute;
    right: 10%;
    top: 50%;
    transform: translateY(-50%);
    color: var(--md-sys-color-on-surface);
    text-align: right;
    z-index: 10;
    opacity: 1;
    transition: opacity 0.3s cubic-bezier(0.2, 0, 0, 1);
    pointer-events: none;
}

.welcome-text h1 {
    font: var(--md-sys-typescale-display-large);
    color: var(--md-sys-color-primary);
    margin-bottom: 1rem;
    letter-spacing: 0;
}

.welcome-text p {
    font: var(--md-sys-typescale-headline-small);
    color: var(--md-sys-color-on-surface-variant);
    font-weight: 300;
}

.cards-container {
    position: absolute;
    width: 90%;
    max-width: 500px;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    opacity: 0;
    transition: opacity 0.5s cubic-bezier(0.2, 0, 0, 1);
    z-index: 5;
    pointer-events: none;
    visibility: hidden;
    left: 5%;
    top: 50%;
    transform: translateY(-50%);
    height: 60vh;
    max-height: 85vh;
    overflow-y: auto;
    overflow-x: hidden;
    padding: 1.25rem;
    background: rgba(var(--md-sys-color-surface-rgb, 25, 27, 31), 0.5);
    backdrop-filter: blur(12px);
    border-radius: var(--md-sys-shape-corner-extra-large);
    box-shadow: inset 0 4px 12px rgba(0, 0, 0, 0.4),
                inset 0 2px 6px rgba(0, 0, 0, 0.3),
                inset 0 0 0 1px rgba(0, 0, 0, 0.2);
    scroll-behavior: smooth;
}

.cards-container::-webkit-scrollbar {
    display: none;
  }

.cards-container.active {
    pointer-events: auto;
    visibility: visible;
}

.nav-cards {
    max-width: 450px;
}

/* Custom scrollbar for cards container */
.cards-container::-webkit-scrollbar {
    width: 8px;
}

.cards-container::-webkit-scrollbar-track {
    background: transparent;
}

.cards-container::-webkit-scrollbar-thumb {
    background: var(--md-sys-color-outline-variant);
    border-radius: var(--md-sys-shape-corner-small);
}

.cards-container::-webkit-scrollbar-thumb:hover {
    background: var(--md-sys-color-outline);
}

/* Expandable card styling */
.expandable-card {
    position: relative;
}

.expand-icon {
    font-size: 1.25rem;
    transition: transform 0.3s cubic-bezier(0.2, 0, 0, 1);
    color: var(--md-sys-color-on-surface-variant);
}

.expandable-card.expanded .expand-icon {
    transform: rotate(180deg);
}

/* Sub-cards container */
.sub-cards-container {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s cubic-bezier(0.2, 0, 0, 1);
    margin-bottom: -0.75rem;
}

.sub-cards-container.expanded {
    max-height: 600px;
    overflow: visible;
    margin-bottom: 0;
}

/* Custom scrollbar for sub-cards */
.sub-cards-container::-webkit-scrollbar {
    width: 6px;
}

.sub-cards-container::-webkit-scrollbar-track {
    background: transparent;
}

.sub-cards-container::-webkit-scrollbar-thumb {
    background: var(--md-sys-color-outline-variant);
    border-radius: var(--md-sys-shape-corner-small);
}

.sub-cards-container::-webkit-scrollbar-thumb:hover {
    background: var(--md-sys-color-outline);
}

.sub-card {
    margin-left: 2rem;
    opacity: 0;
    transform: translateX(-20px);
    transition: opacity 0.3s cubic-bezier(0.2, 0, 0, 1),
                transform 0.3s cubic-bezier(0.2, 0, 0, 1);
}

.sub-cards-container.expanded .sub-card {
    opacity: 1;
    transform: translateX(0);
}

/* Stagger animation for sub-cards */
.sub-cards-container.expanded .sub-card:nth-child(1) {
    transition-delay: 0.05s;
}

.sub-cards-container.expanded .sub-card:nth-child(2) {
    transition-delay: 0.1s;
}

.sub-cards-container.expanded .sub-card:nth-child(3) {
    transition-delay: 0.15s;
}

.sub-cards-container.expanded .sub-card:nth-child(4) {
    transition-delay: 0.2s;
}

.card {
    background: var(--md-sys-color-surface-container-high);
    border: 1px solid var(--md-sys-color-outline-variant);
    border-radius: var(--md-sys-shape-corner-large);
    padding: 0.875rem 1.125rem;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.2, 0, 0, 1);
    text-decoration: none;
    color: var(--md-sys-color-on-surface);
    display: flex;
    align-items: center;
    gap: 1rem;
    min-height: 60px;
    box-shadow: var(--md-sys-elevation-1);
}

.card:hover {
    transform: scale(1.02);
    background: var(--md-sys-color-surface-container-highest);
    box-shadow: var(--md-sys-elevation-2);
    border-color: var(--md-sys-color-primary);
}

.card .icon {
    font-size: 1.75rem;
    flex-shrink: 0;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--md-sys-color-primary-container);
    color: var(--md-sys-color-on-primary-container);
    border-radius: var(--md-sys-shape-corner-medium);
}

.card-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.card h3 {
    font: var(--md-sys-typescale-title-large);
    margin: 0;
    color: var(--md-sys-color-on-surface);
}

.card p {
    font: var(--md-sys-typescale-body-medium);
    color: var(--md-sys-color-on-surface-variant);
    margin: 0;
}

.scroll-indicator {
    position: fixed;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%);
    color: var(--md-sys-color-on-surface-variant);
    font: var(--md-sys-typescale-label-large);
    opacity: 0.8;
    animation: bounce 2s infinite;
    z-index: 20;
    transition: opacity 0.3s cubic-bezier(0.2, 0, 0, 1);
    background: var(--md-sys-color-surface-container);
    padding: 0.75rem 1.5rem;
    border-radius: var(--md-sys-shape-corner-extra-large);
    border: 1px solid var(--md-sys-color-outline-variant);
    box-shadow: var(--md-sys-elevation-1);
}

.scroll-indicator.hidden {
    opacity: 0;
}

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% {
        transform: translateX(-50%) translateY(0);
    }
    40% {
        transform: translateX(-50%) translateY(-10px);
    }
    60% {
        transform: translateX(-50%) translateY(-5px);
    }
}

.scroll-indicator::after {
    content: '↓';
    display: block;
    text-align: center;
    font-size: 1.5rem;
    margin-top: 0.25rem;
}

/* Responsive design */
@media (max-width: 768px) {
    .welcome-text {
        left: 50%;
        right: auto;
        transform: translate(-50%, -50%);
        text-align: center;
        padding: 0 2rem;
    }

    .welcome-text h1 {
        font: var(--md-sys-typescale-display-medium);
    }

    .welcome-text p {
        font: var(--md-sys-typescale-headline-small);
    }

    .background-image.shrink {
        width: 90%;
        height: 40%;
        top: 5%;
        left: 5%;
    }

    .cards-container {
        width: 95%;
        max-width: 400px;
        left: 50% !important;
        top: 55% !important;
        transform: translate(-50%, -50%) !important;
        gap: 0.75rem;
        max-height: 70vh;
    }

    .card {
        padding: 1rem 1.25rem;
        min-height: 64px;
        gap: 1rem;
    }

    .card .icon {
        font-size: 1.75rem;
        width: 40px;
        height: 40px;
    }

    .card h3 {
        font: var(--md-sys-typescale-title-medium);
    }

    .card p {
        font: var(--md-sys-typescale-body-small);
    }

    .scroll-indicator {
        padding: 0.5rem 1rem;
        font: var(--md-sys-typescale-label-medium);
    }
}

@media (max-width: 480px) {
    .welcome-text h1 {
        font: var(--md-sys-typescale-display-small);
    }

    .cards-container {
        gap: 0.5rem;
    }

    .card {
        padding: 0.875rem 1rem;
        min-height: 56px;
    }
}