@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;600;800&display=swap');

:root {
    --bg: #06060e;
    --glass: rgba(255, 255, 255, 0.03);
    --glass-hover: rgba(255, 255, 255, 0.06);
    --border: rgba(255, 255, 255, 0.08);
    --text: #e8e8f0;
    --text-secondary: rgba(255, 255, 255, 0.4);
    --accent: #a855f7;
    --accent-glow: rgba(168, 85, 247, 0.3);
    --danger: #ef4444;
    --danger-glow: rgba(239, 68, 68, 0.3);
    --success: #22c55e;
    --success-glow: rgba(34, 197, 94, 0.3);
    --radius: 16px;
    --radius-sm: 10px;
    --transition: 0.25s ease;
    --font: 'Inter', -apple-system, sans-serif;
}

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

html { font-size: 16px; -webkit-font-smoothing: antialiased; }

body {
    font-family: var(--font);
    background: var(--bg);
    color: var(--text);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background-image:
            radial-gradient(ellipse at 20% 50%, rgba(168, 85, 247, 0.08) 0%, transparent 50%),
            radial-gradient(ellipse at 80% 20%, rgba(6, 182, 212, 0.06) 0%, transparent 50%),
            radial-gradient(ellipse at 50% 80%, rgba(239, 68, 68, 0.04) 0%, transparent 50%);
}

.main {
    width: 100%;
    max-width: 750px;
    padding: 2rem 1.25rem;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.upload-screen,
.view-screen,
.error-screen {
    width: 100%;
    display: none;
}

.upload-screen.active,
.view-screen.active,
.error-screen.active {
    display: block;
    animation: fadeUp 0.4s ease;
}

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

.upload-center {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1.5rem;
}

.logo { text-align: center; margin-bottom: 0.5rem; }
.logo__icon { font-size: 2.5rem; display: block; margin-bottom: 0.4rem; filter: drop-shadow(0 0 20px rgba(168, 85, 247, 0.5)); }
.logo__title {
    font-size: 2.2rem;
    font-weight: 800;
    letter-spacing: -0.03em;
    background: linear-gradient(135deg, #a855f7, #06b6d4);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}
.logo__subtitle { font-size: 0.85rem; color: var(--text-secondary); margin-top: 0.2rem; font-weight: 300; }

.upload-zone {
    width: 100%;
    max-width: 480px;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 2.5rem 1.5rem;
    text-align: center;
    cursor: pointer;
    background: var(--glass);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    transition: all var(--transition);
}

.upload-zone:hover {
    border-color: rgba(168, 85, 247, 0.4);
    box-shadow: 0 0 40px var(--accent-glow);
    background: var(--glass-hover);
}

.upload-zone.drag-over {
    border-color: #22c55e;
    box-shadow: 0 0 40px var(--success-glow);
    background: rgba(34, 197, 94, 0.04);
}

.upload-zone__icon { font-size: 2.5rem; margin-bottom: 0.5rem; display: block; }
.upload-zone__title { font-size: 1.1rem; font-weight: 600; margin-bottom: 0.3rem; }
.upload-zone__hint { color: var(--text-secondary); font-size: 0.8rem; font-weight: 300; }
.upload-zone__hint--small { font-size: 0.7rem; margin-top: 0.2rem; opacity: 0.6; }

.progress {
    display: none;
    width: 100%;
    max-width: 480px;
    flex-direction: column;
    gap: 0.5rem;
    background: var(--glass);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 1rem 1.1rem;
}

.progress.active { display: flex; }

.progress__header {
    display: flex;
    justify-content: space-between;
    font-size: 0.78rem;
    font-weight: 500;
}

.progress__filename { color: var(--text-secondary); max-width: 70%; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.progress__percent { font-weight: 700; color: var(--accent); }

.progress__track {
    height: 4px;
    background: rgba(255,255,255,0.06);
    border-radius: 10px;
    overflow: hidden;
}

.progress__fill {
    height: 100%;
    width: 0%;
    background: var(--accent);
    border-radius: 10px;
    box-shadow: 0 0 10px var(--accent-glow);
    transition: width 0.15s ease;
}

.result {
    display: none;
    width: 100%;
    max-width: 480px;
    flex-direction: column;
    align-items: center;
    gap: 0.9rem;
    background: var(--glass);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid rgba(34, 197, 94, 0.3);
    border-radius: var(--radius);
    padding: 1.5rem;
    text-align: center;
    box-shadow: 0 0 30px var(--success-glow);
}

.result.active { display: flex; }

.result__label { font-weight: 600; font-size: 1rem; color: var(--success); }
.result__count { font-size: 0.75rem; color: var(--text-secondary); font-weight: 300; }

.result__link-row { display: flex; width: 100%; gap: 0.5rem; }

.result__input {
    flex: 1;
    background: rgba(0,0,0,0.3);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 0.6rem 0.8rem;
    color: var(--text);
    font-size: 0.78rem;
    font-family: var(--font);
    outline: none;
}

.result__input:focus { border-color: var(--accent); box-shadow: 0 0 10px var(--accent-glow); }

.result__actions { display: flex; gap: 0.5rem; width: 100%; }
.result__actions .btn { flex: 1; }

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.35rem;
    padding: 0.55rem 1rem;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    background: var(--glass);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    color: var(--text);
    font-size: 0.8rem;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition);
    font-family: var(--font);
    white-space: nowrap;
}

.btn:hover { background: var(--glass-hover); border-color: rgba(255,255,255,0.2); }

.btn--copy-result {
    background: linear-gradient(135deg, #a855f7, #06b6d4);
    border: none;
    color: #fff;
    font-weight: 600;
    flex-shrink: 0;
}

.btn--copy-result:hover { opacity: 0.9; box-shadow: 0 0 20px var(--accent-glow); }

.btn--primary {
    background: linear-gradient(135deg, #a855f7, #06b6d4);
    border: none;
    color: #fff;
    font-weight: 600;
}

.btn--primary:hover { opacity: 0.9; box-shadow: 0 0 20px var(--accent-glow); }

.btn--danger { border-color: rgba(239, 68, 68, 0.3); color: var(--danger); }
.btn--danger:hover { background: rgba(239, 68, 68, 0.1); border-color: var(--danger); box-shadow: 0 0 20px var(--danger-glow); }

.view-center {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1.2rem;
    width: 100%;
}

.album__header { text-align: center; width: 100%; }

.album__title {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 0.3rem;
}

.album__timer {
    display: inline-block;
    font-size: 0.75rem;
    color: var(--text-secondary);
    padding: 0.35rem 0.8rem;
    background: var(--glass);
    backdrop-filter: blur(10px);
    border: 1px solid var(--border);
    border-radius: 20px;
    font-weight: 500;
}

.album__timer.warning { color: #f59e0b; border-color: rgba(245, 158, 11, 0.3); box-shadow: 0 0 15px rgba(245, 158, 11, 0.2); }
.album__timer.danger { color: var(--danger); border-color: rgba(239, 68, 68, 0.3); box-shadow: 0 0 15px var(--danger-glow); }

.album__grid {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 0.6rem;
    width: 100%;
}

.album__thumb {
    width: 200px;
    max-width: 100%;
    aspect-ratio: 1;
    object-fit: cover;
    border-radius: var(--radius-sm);
    cursor: pointer;
    border: 1px solid var(--border);
    transition: all var(--transition);
}

.album__thumb:hover { border-color: var(--accent); box-shadow: 0 0 25px var(--accent-glow); transform: scale(1.02); }

.album__actions { display: flex; gap: 0.5rem; flex-wrap: wrap; justify-content: center; }

.lightbox {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(6, 6, 14, 0.95);
    backdrop-filter: blur(10px);
    z-index: 1000;
    align-items: center;
    justify-content: center;
    padding: 2rem;
    flex-direction: column;
    gap: 1rem;
}

.lightbox.active { display: flex; }

.lightbox__image {
    max-width: 90vw;
    max-height: 75vh;
    object-fit: contain;
    border-radius: var(--radius);
    border: 1px solid var(--border);
    box-shadow: 0 0 40px rgba(168, 85, 247, 0.2);
}

.lightbox__counter { font-size: 0.8rem; font-weight: 500; color: var(--text-secondary); }

.lightbox__nav { display: flex; gap: 0.8rem; }

.lightbox__nav button {
    background: var(--glass);
    backdrop-filter: blur(10px);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    color: var(--text);
    padding: 0.5rem 1rem;
    font-size: 0.8rem;
    cursor: pointer;
    font-family: var(--font);
    transition: all var(--transition);
}

.lightbox__nav button:hover { background: var(--glass-hover); border-color: var(--accent); box-shadow: 0 0 15px var(--accent-glow); }

.lightbox__close {
    position: absolute;
    top: 1rem;
    right: 1rem;
    background: var(--glass);
    backdrop-filter: blur(10px);
    border: 1px solid var(--border);
    border-radius: 50%;
    color: var(--text);
    width: 40px;
    height: 40px;
    font-size: 1.2rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition);
}

.lightbox__close:hover { border-color: var(--danger); color: var(--danger); box-shadow: 0 0 15px var(--danger-glow); }

.error-center {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    gap: 1rem;
    padding: 3rem 2rem;
    background: var(--glass);
    backdrop-filter: blur(20px);
    border: 1px solid rgba(239, 68, 68, 0.3);
    border-radius: var(--radius);
    box-shadow: 0 0 30px var(--danger-glow);
}

.error__icon { font-size: 3rem; }
.error__title { font-size: 1.3rem; font-weight: 600; color: var(--danger); }
.error__text { font-size: 0.85rem; color: var(--text-secondary); font-weight: 300; }

.toast-container {
    position: fixed;
    bottom: 1.5rem;
    right: 1.5rem;
    display: flex;
    flex-direction: column-reverse;
    gap: 0.5rem;
    z-index: 2000;
    pointer-events: none;
}

.toast {
    background: var(--glass);
    backdrop-filter: blur(20px);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 0.75rem 1rem;
    font-size: 0.8rem;
    font-weight: 500;
    pointer-events: auto;
    animation: slideIn 0.3s ease;
}

.toast.success { border-color: rgba(34, 197, 94, 0.3); box-shadow: 0 0 15px var(--success-glow); }
.toast.error { border-color: rgba(239, 68, 68, 0.3); box-shadow: 0 0 15px var(--danger-glow); }
.toast.info { border-color: rgba(168, 85, 247, 0.3); box-shadow: 0 0 15px var(--accent-glow); }

@keyframes slideIn {
    from { opacity: 0; transform: translateX(40px); }
    to { opacity: 1; transform: translateX(0); }
}

@media (max-width: 480px) {
    .main { padding: 1.5rem 1rem; }
    .upload-zone { padding: 2rem 1rem; }
    .logo__title { font-size: 1.6rem; }
    .album__thumb { width: 140px; }
    .result__actions { flex-direction: column; }
}