/* hero section */
#hero {
    position: relative;
    min-height: 100vh;
    height: 100vh;
    display: flex;
    align-items: center;
    overflow: hidden;
}

/* layered background build-up */
.hero-base {
    position: absolute;
    inset: 0;
    z-index: 0;
}

/* bottom fade into page */
.hero-fade {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 180px;
    z-index: 4;
    background: linear-gradient(to bottom, transparent, var(--clr-bg));
}

/* dark overlay over everything */
.hero-overlay {
    position: absolute;
    inset: 0;
    z-index: 5;
    background-size: cover;
    background-image: linear-gradient(to right, rgba(0, 0, 0, 0.6), rgba(0, 0, 0, 0.2) 40%, rgba(0, 0, 0, 0.1)), url("/images/im_hero.avif");
}

.hero-content {
    position: relative;
    z-index: 6;
    width: 100%;
    max-width: var(--max-w);
    margin: 0 auto;
    padding: 0 var(--pad-x);
    padding-top: calc(var(--header-h) + 16px);
}

.hero-title {
    font-weight: 700;
    font-size: clamp(2.6rem, 6vw, 5.2rem);
    line-height: 1.0;
    letter-spacing: -0.03em;
    color: #fff;
    margin-bottom: 22px;
    text-transform: lowercase;
}

.hero-sub {
    font-weight: 300;
    font-size: clamp(0.92rem, 1.5vw, 1.1rem);
    color: rgba(255, 255, 255, 0.62);
    max-width: 540px;
    line-height: 1.7;
    margin-bottom: 36px;
}

/* hero entry animations */
@keyframes heroFadeUp {
    from {
        opacity: 0;
        transform: translateY(22px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.hero-eyebrow {
    animation: heroFadeUp var(--t-lg) var(--ease-out) 0.1s both;
}

.hero-title {
    animation: heroFadeUp var(--t-lg) var(--ease-out) 0.22s both;
}

.hero-sub {
    animation: heroFadeUp var(--t-lg) var(--ease-out) 0.34s both;
}

.hero-cta {
    animation: heroFadeUp var(--t-lg) var(--ease-out) 0.46s both;
}

/* projects section */
#projects {
    background: var(--clr-bg);
}

.proj-tabs {
    display: flex;
    gap: 6px;
    flex-wrap: wrap;
    margin-bottom: 32px;
    padding-bottom: 18px;
    border-bottom: 1px solid var(--clr-border);
}

.proj-tab {
    padding: 7px 16px;
    border-radius: var(--r-sm);
    font-weight: 400;
    font-size: 0.8rem;
    letter-spacing: 0.04em;
    color: var(--clr-text-tertiary);
    border: 1px solid transparent;
    background: transparent;
    cursor: pointer;
    transition: all var(--t-sm);
}

.proj-tab:hover {
    color: var(--clr-text-secondary);
    background: var(--clr-surface-2);
}

.proj-tab.active {
    color: var(--clr-text-primary);
    background: var(--clr-surface-2);
    border-color: var(--clr-border);
}

/* category group */
.proj-group {
    display: none;
}

.proj-group.visible {
    display: block;
}

.proj-group-label {
    display: flex;
    align-items: center;
    gap: 14px;
    font-weight: 300;
    font-size: 0.67rem;
    letter-spacing: 0.18em;
    text-transform: lowercase;
    color: var(--clr-text-tertiary);
    margin-bottom: 18px;
}

.proj-group-label::after {
    content: '';
    flex: 1;
    height: 1px;
    background: var(--clr-border);
}

/* cards */
.proj-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
    /* wider on desktop */
    gap: 16px;
    margin-bottom: 36px;
}

.proj-card {
    position: relative;
    background: var(--clr-surface);
    border: 1px solid var(--clr-border);
    border-radius: var(--r-md);
    cursor: pointer;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    transition: all var(--t-md) var(--ease-out);
    padding-bottom: 20px;
    /* ← fixed bottom padding */
}

.proj-card:hover {
    border-color: var(--clr-border-hover);
    transform: translateY(-4px);
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.25);
}

.proj-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--clr-accent);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform var(--t-md) var(--ease-out);
}

.proj-card:hover::before {
    transform: scaleX(1);
}

.proj-card-image {
    width: 100%;
    aspect-ratio: 16 / 9;
    overflow: hidden;
}

.proj-card-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

.proj-card-top,
.proj-card-name,
.proj-card-desc {
    padding-left: 20px;
    padding-right: 20px;
}

.proj-card-top {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 18px 20px 4px 20px;
}

.proj-card-left {
    display: flex;
    align-items: center;
}

.proj-card-icon {
    width: 64px;
    height: 64px;
    margin-bottom: 4px;
}

.proj-card-name {
    font-weight: 600;
    font-size: 0.95rem;
    line-height: 1.3;
    color: var(--clr-text-primary);
    margin: 4px 0 8px;
}

.proj-card-desc {
    font-weight: 300;
    font-size: 0.82rem;
    color: var(--clr-text-secondary);
    line-height: 1.6;
    flex-grow: 1;
}

/* videos section */
#videos {
    background: var(--clr-surface);
}

.videos-layout {
    display: grid;
    grid-template-columns: 1fr 330px;
    gap: 24px;
    align-items: start;
}

/* main player */
.video-player-frame {
    position: relative;
    padding-top: 56.25%;
    border-radius: var(--r-md);
    overflow: hidden;
    background: #000;
    border: 1px solid var(--clr-border);
}

.video-player-frame iframe {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    border: none;
}

.video-info {
    margin-top: 16px;
}

.video-info-title {
    font-weight: 600;
    font-size: 1rem;
    color: var(--clr-text-primary);
    line-height: 1.35;
    margin-bottom: 5px;
}

.video-info-date {
    font-weight: 300;
    font-size: 0.75rem;
    color: var(--clr-text-tertiary);
    margin-bottom: 10px;
}

.video-info-desc {
    font-weight: 300;
    font-size: 0.855rem;
    color: var(--clr-text-secondary);
    line-height: 1.65;
}

/* playlist */
.video-playlist {
    display: flex;
    flex-direction: column;
    gap: 7px;
    max-height: 510px;
    overflow-y: auto;
    /* Minimal scrollbar */
    scrollbar-width: thin;
    scrollbar-color: var(--clr-surface-4) transparent;
}

.video-playlist::-webkit-scrollbar {
    width: 4px;
}

.video-playlist::-webkit-scrollbar-thumb {
    background: var(--clr-surface-4);
    border-radius: 4px;
}

.playlist-item {
    display: flex;
    gap: 10px;
    padding: 10px;
    border-radius: var(--r-sm);
    border: 1px solid var(--clr-border);
    background: var(--clr-surface-2);
    cursor: pointer;
    transition: border-color var(--t-sm), background var(--t-sm);
    width: 100%;
    box-sizing: border-box;
    min-width: 0;
}

.playlist-item:hover {
    border-color: var(--clr-border-hover);
    background: var(--clr-surface-3);
}

.playlist-item.active {
    border-color: var(--clr-accent);
    background: var(--clr-accent-subtle);
}

.playlist-thumb {
    flex: 0 0 96px;
    width: 96px;
    height: 54px;
    overflow: hidden;
    border-radius: var(--r-xs);
    position: relative;
}

.playlist-thumb img {
    width: 100%;
    height: 135%;
    object-fit: cover;
    object-position: center;
    transform: translateY(-13%);
    display: block;
}

.playlist-meta {
    flex: 1 1 auto;
    min-width: 0;
    overflow: hidden;
}

.playlist-title {
    font-weight: 400;
    font-size: 0.77rem;
    line-height: 1.35;
    margin-bottom: 4px;
    min-width: 0;
    overflow-wrap: anywhere;
    -webkit-line-clamp: 2;
    line-clamp: 2;
    word-break: break-word;
    -webkit-box-orient: vertical;
    display: -webkit-box;
    text-overflow: ellipsis;
    overflow: hidden;
}

.playlist-date {
    font-weight: 300;
    font-size: 0.68rem;
    color: var(--clr-text-tertiary);
}

/* contact section */
#contact::before {
    content: "";
    position: absolute;
    inset: -60%;
    transform: rotate(30deg);

    background-image: linear-gradient(90deg, transparent, var(--clr-surface-4));

    -webkit-mask-image: radial-gradient(circle at top left,
            rgba(0, 0, 0, 1) 0%,
            rgba(0, 0, 0, 1) 40%,
            rgba(0, 0, 0, 0) 80%);

    mask-image: radial-gradient(circle at top left,
            rgba(0, 0, 0, 1) 0%,
            rgba(0, 0, 0, 1) 40%,
            rgba(0, 0, 0, 0) 80%);
}

#contact {
    background: var(--clr-bg);
    position: relative;
    overflow: hidden;
}

#contact>* {
    position: relative;
    z-index: 1;
}

.contact-layout {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 52px;
    align-items: start;
}

/* form elements */
.form-group {
    display: flex;
    flex-direction: column;
    gap: 6px;
    margin-bottom: 15px;
}

.form-label {
    font-weight: 300;
    font-size: 0.75rem;
    letter-spacing: 0.09em;
    text-transform: lowercase;
    color: var(--clr-text-tertiary);
}

.form-input,
.form-textarea {
    background: var(--clr-input-bg);
    border: 1px solid var(--clr-input-border);
    border-radius: var(--r-sm);
    padding: 10px 14px;
    color: var(--clr-text-primary);
    font-weight: 300;
    font-size: 0.875rem;
    outline: none;
    transition: border-color var(--t-sm), box-shadow var(--t-sm);
    width: 100%;
    resize: none !important;
}

.form-input::placeholder,
.form-textarea::placeholder {
    color: var(--clr-text-tertiary);
}

.form-input:focus,
.form-textarea:focus {
    border-color: var(--clr-accent);
}

.form-textarea {
    min-height: 130px;
    resize: vertical;
}

.form-actions {
    display: flex;
    gap: 10px;
    margin-top: 4px;
}

/* contact info cards */
.contact-info {
    display: flex;
    flex-direction: column;
    gap: 1px;
}

.contact-desc {
    font-weight: 300;
    font-size: 0.9rem;
    color: var(--clr-text-secondary);
    line-height: 1.7;
    margin-bottom: 18px;
}

.contact-item {
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 13px 16px;
    border-radius: var(--r-md);
    border: 1px solid var(--clr-border);
    background-color: var(--clr-card-background-default);
    margin-bottom: 8px;
    transition: border-color var(--t-sm), background var(--t-sm);
}

.contact-item:last-child {
    margin-bottom: 0;
}

.contact-item:hover {
    border-color: var(--clr-border-hover);
}

.contact-item-icon {
    width: 34px;
    height: 34px;
    border-radius: var(--r-sm);
    background: var(--clr-surface-2);
    border: 1px solid var(--clr-border);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--clr-accent);
    flex-shrink: 0;
}

.contact-item-body {
    flex: 1;
    min-width: 0;
}

.contact-item-label {
    font-weight: 300;
    font-size: 0.67rem;
    letter-spacing: 0.1em;
    text-transform: lowercase;
    color: var(--clr-text-tertiary);
    margin-bottom: 2px;
}

.contact-item-value {
    font-weight: 400;
    font-size: 0.8rem;
    color: var(--clr-accent);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.contact-item:hover .contact-item-value {
    text-decoration: underline;
}

/* project detail modal */
.modal-overlay {
    position: fixed;
    inset: 0;
    z-index: 2000;
    background: rgba(0, 0, 0, 0.75);
    backdrop-filter: var(--blur-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--pad-x);
    opacity: 0;
    pointer-events: none;
    transition: opacity var(--t-md);
}

.modal-overlay.open {
    opacity: 1;
    pointer-events: all;
}

.modal {
    background: var(--clr-surface);
    border: 1px solid var(--clr-border);
    border-radius: var(--r-lg);
    width: 100%;
    max-width: 560px;
    max-height: 94vh;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    transform: translateY(20px) scale(0.97);
    transition: transform var(--t-md) var(--ease-out);
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
}

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

/* Modal Header - always visible */
.modal-header {
    padding: 24px 28px 16px;
    border-bottom: 1px solid var(--clr-border);
    flex-shrink: 0;
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 12px;
    background: var(--clr-surface);
    z-index: 1;
}

.modal-title {
    font-weight: 600;
    font-size: 1.15rem;
    color: var(--clr-text-primary);
    line-height: 1.3;
}

.modal-close {
    width: 30px;
    height: 30px;
    border-radius: var(--r-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--clr-text-tertiary);
    border: 1px solid transparent;
    flex-shrink: 0;
    transition: all var(--t-sm);
}

.modal-close:hover {
    color: var(--clr-text-primary);
    background: var(--clr-surface-2);
    border-color: var(--clr-border);
}

/* Scrollable Content Area */
.modal-body {
    flex: 1;
    overflow-y: auto;
    padding: 0 28px;
    scrollbar-width: thin;
    scrollbar-color: var(--clr-border) transparent;
}

.modal-body::-webkit-scrollbar {
    width: 6px;
}

.modal-body::-webkit-scrollbar-thumb {
    background: var(--clr-border);
    border-radius: 10px;
}

/* Footer (Tags + Actions) - always visible */
.modal-footer {
    padding: 20px 28px 24px;
    border-top: 1px solid var(--clr-border);
    background: var(--clr-surface);
    flex-shrink: 0;
}

.modal-actions {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}

/* Markdown improvements */
.modal-markdown h1,
.modal-markdown h2,
.modal-markdown h3 {
    color: var(--clr-text-primary);
    margin: 1.5em 0 0.7em;
    font-weight: 600;
}

.modal-markdown h2 {
    font-size: 1.25rem;
}

.modal-markdown h3 {
    font-size: 1.1rem;
}

.modal-markdown p {
    margin-bottom: 1.1em;
    line-height: 1.75;
}

.modal-markdown ul,
.modal-markdown ol {
    margin: 0.8em 0 1.1em 1.4em;
    padding-left: 0.6em;
}

.modal-markdown li {
    margin-bottom: 0.45em;
    line-height: 1.65;
}

/* Nested list indentation */
.modal-markdown ul ul,
.modal-markdown ol ul,
.modal-markdown ul ol,
.modal-markdown ol ol {
    margin-top: 0.3em;
    margin-bottom: 0.3em;
}

/* Images */
.modal-markdown-img {
    max-width: 100%;
    border-radius: var(--r-md);
    margin: 1.4em 0;
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.15);
}

/* YouTube */
.youtube-embed {
    position: relative;
    padding-top: 56.25%;
    height: 0;
    margin: 1.6em 0;
    border-radius: var(--r-md);
    overflow: hidden;
    background: #000;
}

.youtube-embed iframe {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    border: none;
}

/* toast notification */
.toast {
    position: fixed;
    bottom: 28px;
    right: 28px;
    z-index: 3000;
    background: var(--clr-surface-3);
    border: 1px solid var(--clr-border);
    border-radius: var(--r-md);
    padding: 13px 18px;
    font-weight: 300;
    font-size: 0.85rem;
    color: var(--clr-text-primary);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
    opacity: 0;
    transform: translateY(12px);
    pointer-events: none;
    transition: opacity var(--t-md), transform var(--t-md) var(--ease-out);
}

.toast.show {
    opacity: 1;
    transform: translateY(0);
    pointer-events: all;
}

/* responsive */
@media (max-width: 900px) {
    .videos-layout {
        grid-template-columns: 1fr;
    }

    .video-playlist {
        flex-direction: row;
        flex-wrap: nowrap;
        max-height: none;
        overflow-x: auto;
        overflow-y: visible;
    }

    .playlist-item {
        min-width: 170px;
        flex-direction: column;
    }

    .playlist-thumb {
        width: 100%;
        height: 80px;
    }

    .contact-layout {
        grid-template-columns: 1fr;
        gap: 36px;
    }
}