/* ==============================================
   ImgHost — Frontend CSS (Dark / Light Mode)
   ============================================== */

/* ---- Variables ---- */
:root {
    /* Dark mode defaults */
    --bg: #0f1117;
    --surface: #1a1d27;
    --surface2: #22263a;
    --border: rgba(255, 255, 255, 0.07);
    --border2: rgba(255, 255, 255, 0.12);
    --text: #e8eaf6;
    --text-muted: rgba(255, 255, 255, 0.45);
    --accent: #6c63ff;
    --accent2: #857dff;
    --accent-glow: rgba(108, 99, 255, 0.3);
    --success: #00c897;
    --danger: #ff5c6c;
    --radius: 18px;
    --radius-sm: 10px;
    --shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
    --shadow-sm: 0 4px 20px rgba(0, 0, 0, 0.3);
    --transition: 0.25s ease;
}

[data-theme="light"] {
    --bg: #f4f6fb;
    --surface: #ffffff;
    --surface2: #eef0f8;
    --border: rgba(0, 0, 0, 0.07);
    --border2: rgba(0, 0, 0, 0.12);
    --text: #1a1d27;
    --text-muted: rgba(0, 0, 0, 0.45);
    --accent: #5b52e8;
    --accent2: #6c63ff;
    --accent-glow: rgba(91, 82, 232, 0.2);
    --success: #00b386;
    --danger: #e53935;
    --shadow: 0 20px 60px rgba(0, 0, 0, 0.1);
    --shadow-sm: 0 4px 20px rgba(0, 0, 0, 0.08);
}

/* ---- Base ---- */
*,
*::before,
*::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', system-ui, sans-serif;
    background: var(--bg);
    color: var(--text);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    transition: background var(--transition), color var(--transition);
    line-height: 1.6;
}

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

img {
    max-width: 100%;
}

/* ---- Layout ---- */
.container {
    max-width: 820px;
    margin: 0 auto;
    padding: 0 1.25rem;
}

.container-wide {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 1.25rem;
}

main {
    flex: 1;
}

/* ---- Header ---- */
.site-header {
    padding: 1.1rem 0;
    border-bottom: 1px solid var(--border);
    background: var(--surface);
    position: sticky;
    top: 0;
    z-index: 100;
    backdrop-filter: blur(20px);
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    font-weight: 800;
    font-size: 1.25rem;
    letter-spacing: -0.03em;
}

.logo-icon {
    width: 36px;
    height: 36px;
    background: linear-gradient(135deg, var(--accent), var(--accent2));
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1rem;
    color: #fff;
    box-shadow: 0 4px 16px var(--accent-glow);
}

.logo-text {
    color: var(--text);
}

.logo-text span {
    color: var(--accent);
}

/* ---- Theme Toggle ---- */
.theme-toggle {
    width: 40px;
    height: 40px;
    background: var(--surface2);
    border: 1px solid var(--border2);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    font-size: 1.05rem;
    transition: all var(--transition);
    color: var(--text);
}

.theme-toggle:hover {
    background: var(--border2);
    transform: rotate(20deg);
}

/* ---- Page Hero ---- */
.page-hero {
    text-align: center;
    padding: 3.5rem 0 2rem;
}

.page-hero h1 {
    font-size: clamp(2rem, 5vw, 3.2rem);
    font-weight: 900;
    letter-spacing: -0.04em;
    line-height: 1.1;
    margin-bottom: 0.75rem;
}

.page-hero h1 span {
    background: linear-gradient(135deg, var(--accent), var(--accent2));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.page-hero p {
    color: var(--text-muted);
    font-size: 1.05rem;
}

/* ---- Upload Box ---- */
.upload-section {
    padding: 0 0 4rem;
}

.drop-zone {
    border: 2px dashed var(--border2);
    border-radius: var(--radius);
    padding: 3.5rem 2rem;
    text-align: center;
    cursor: pointer;
    background: var(--surface);
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
    user-select: none;
}

.drop-zone::before {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(circle at 50% 50%, var(--accent-glow), transparent 70%);
    opacity: 0;
    transition: opacity 0.4s ease;
}

.drop-zone:hover,
.drop-zone.drag-over {
    border-color: var(--accent);
    box-shadow: 0 0 0 4px var(--accent-glow), var(--shadow-sm);
}

.drop-zone:hover::before,
.drop-zone.drag-over::before {
    opacity: 1;
}

.drop-zone .dz-icon {
    font-size: 3.5rem;
    display: block;
    margin-bottom: 1rem;
    transition: transform 0.3s ease;
    position: relative;
    z-index: 1;
}

.drop-zone:hover .dz-icon,
.drop-zone.drag-over .dz-icon {
    transform: scale(1.1) translateY(-4px);
}

.drop-zone .dz-title {
    font-size: 1.3rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    position: relative;
    z-index: 1;
}

.drop-zone .dz-subtitle {
    font-size: 0.9rem;
    color: var(--text-muted);
    position: relative;
    z-index: 1;
    margin-bottom: 1.5rem;
}

.drop-zone .btn-browse {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    background: linear-gradient(135deg, var(--accent), var(--accent2));
    color: #fff;
    border: none;
    border-radius: 50px;
    padding: 0.7rem 1.75rem;
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition);
    box-shadow: 0 8px 30px var(--accent-glow);
    position: relative;
    z-index: 1;
}

.drop-zone .btn-browse:hover {
    transform: translateY(-2px);
    box-shadow: 0 12px 40px var(--accent-glow);
}

.upload-hint {
    text-align: center;
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-top: 0.875rem;
}

.upload-hint strong {
    color: var(--accent);
}

/* ---- Progress ---- */
.progress-wrap {
    display: none;
    margin-top: 1.5rem;
}

.progress-wrap.visible {
    display: block;
}

.progress-info {
    display: flex;
    justify-content: space-between;
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-bottom: 0.5rem;
}

.progress-bar-track {
    height: 8px;
    background: var(--surface2);
    border-radius: 50px;
    overflow: hidden;
}

.progress-bar-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--accent), var(--accent2));
    border-radius: 50px;
    width: 0%;
    transition: width 0.2s ease;
    box-shadow: 0 0 10px var(--accent-glow);
}

/* ---- Result Panel ---- */
.result-panel {
    display: none;
    margin-top: 2rem;
    background: var(--surface);
    border: 1px solid var(--border2);
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    animation: slideUp 0.4s ease;
}

.result-panel.visible {
    display: block;
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }

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

.result-preview {
    position: relative;
    background: var(--surface2);
    text-align: center;
    padding: 1.5rem;
    border-bottom: 1px solid var(--border);
}

.result-preview img {
    max-height: 320px;
    max-width: 100%;
    border-radius: 10px;
    box-shadow: var(--shadow-sm);
    object-fit: contain;
}

.result-meta {
    position: absolute;
    bottom: 1rem;
    right: 1rem;
    display: flex;
    gap: 0.5rem;
}

.result-meta-badge {
    background: rgba(0, 0, 0, 0.55);
    color: #fff;
    border-radius: 6px;
    padding: 0.2rem 0.6rem;
    font-size: 0.72rem;
    font-weight: 600;
    backdrop-filter: blur(8px);
}

.result-links {
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
    gap: 0.875rem;
}

.link-card {
    background: var(--surface2);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 0.875rem 1rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.link-label {
    font-size: 0.72rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--accent);
    white-space: nowrap;
    min-width: 90px;
}

.link-value {
    flex: 1;
    font-size: 0.8rem;
    color: var(--text-muted);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    font-family: 'SF Mono', 'Fira Code', monospace;
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: 7px;
    padding: 0.45rem 0.75rem;
}

.btn-copy {
    flex-shrink: 0;
    background: linear-gradient(135deg, var(--accent), var(--accent2));
    color: #fff;
    border: none;
    border-radius: 8px;
    padding: 0.45rem 0.875rem;
    font-size: 0.8rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition);
    white-space: nowrap;
    display: flex;
    align-items: center;
    gap: 0.3rem;
}

.btn-copy:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 16px var(--accent-glow);
}

.btn-copy.copied {
    background: linear-gradient(135deg, var(--success), #00e0b0);
    box-shadow: 0 4px 16px rgba(0, 200, 151, 0.3);
}

.result-actions {
    padding: 0 1.5rem 1.5rem;
    display: flex;
    gap: 0.75rem;
}

.btn-upload-again {
    flex: 1;
    background: var(--surface2);
    border: 1px solid var(--border2);
    color: var(--text);
    border-radius: 10px;
    padding: 0.65rem;
    font-size: 0.875rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition);
}

.btn-upload-again:hover {
    background: var(--border2);
}

.btn-view-image {
    flex: 1;
    background: linear-gradient(135deg, var(--accent), var(--accent2));
    border: none;
    color: #fff;
    border-radius: 10px;
    padding: 0.65rem;
    font-size: 0.875rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition);
    text-align: center;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.4rem;
}

.btn-view-image:hover {
    transform: translateY(-1px);
    box-shadow: 0 8px 24px var(--accent-glow);
}

/* ---- Footer ---- */
.site-footer {
    text-align: center;
    padding: 1.5rem 0;
    border-top: 1px solid var(--border);
    font-size: 0.82rem;
    color: var(--text-muted);
}

/* ---- View page ---- */
.view-container {
    padding: 3rem 0;
}

.view-img-wrap {
    background: var(--surface);
    border: 1px solid var(--border2);
    border-radius: var(--radius);
    overflow: hidden;
    text-align: center;
    padding: 1.5rem;
    margin-bottom: 1.5rem;
}

.view-img-wrap img {
    max-width: 100%;
    border-radius: 10px;
}

/* ---- Alerts ---- */
.alert {
    border-radius: var(--radius-sm);
    padding: 0.875rem 1.125rem;
    font-size: 0.875rem;
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 1rem;
}

.alert-success {
    background: rgba(0, 200, 151, 0.1);
    border: 1px solid rgba(0, 200, 151, 0.25);
    color: var(--success);
}

.alert-danger {
    background: rgba(255, 92, 108, 0.1);
    border: 1px solid rgba(255, 92, 108, 0.25);
    color: var(--danger);
}

/* ---- Responsive ---- */
@media (max-width: 600px) {
    .link-card {
        flex-direction: column;
        align-items: stretch;
    }

    .link-label {
        min-width: unset;
    }

    .result-actions {
        flex-direction: column;
    }

    .page-hero {
        padding: 2rem 0 1.5rem;
    }

    .drop-zone {
        padding: 2.5rem 1.25rem;
    }
}