:root {
    color-scheme: light dark;
    --bg: #010409;
    --bg-light: #f9fafc;
    --accent: #2563eb;
    --accent-hover: #1d4ed8;
    --text: #0f172a;
    --text-muted: #64748b;
    --card: rgba(255, 255, 255, 0.9);
    font-family: 'Inter', sans-serif;
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    background: linear-gradient(135deg, var(--bg) 0%, #111827 45%, #020617 100%);
    color: var(--text);
    font-family: 'Inter', sans-serif;
}

.hero {
    flex: 1;
    display: grid;
    place-items: center;
    padding: 4rem 1.5rem;
}

.hero-card {
    width: min(960px, 100%);
    background: var(--card);
    backdrop-filter: blur(18px);
    border-radius: 24px;
    padding: 3.5rem;
    box-shadow: 0 24px 72px rgba(37, 99, 235, 0.2);
}

.hero-card h1 {
    margin: 0 0 1rem;
    font-size: clamp(2.5rem, 6vw, 3.75rem);
    color: #020617;
}

.hero-card p {
    margin: 0;
    font-size: 1.125rem;
    color: var(--text-muted);
    max-width: 600px;
}

.cta-group {
    margin-top: 2.5rem;
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.9rem 1.8rem;
    border-radius: 999px;
    font-weight: 600;
    text-decoration: none;
    transition: transform 0.2s ease, box-shadow 0.2s ease, background-color 0.2s ease;
}

.btn-primary {
    background: var(--accent);
    color: #fff;
    box-shadow: 0 16px 40px rgba(37, 99, 235, 0.35);
}

.btn-primary:hover {
    background: var(--accent-hover);
    transform: translateY(-2px);
}

.btn-secondary {
    color: var(--accent);
    background: rgba(37, 99, 235, 0.12);
}

.btn-secondary:hover {
    transform: translateY(-1px);
}

.btn-secondary.is-active {
    background: var(--accent);
    color: #fff;
}

.btn-tertiary {
    background: rgba(148, 163, 184, 0.16);
    color: #1f2937;
}

.btn-tertiary:hover {
    transform: translateY(-1px);
}

.features {
    margin-top: 3rem;
    display: grid;
    gap: 1.5rem;
}

.feature {
    display: grid;
    gap: 0.5rem;
}

.feature-title {
    font-weight: 600;
    color: #0f172a;
}

.mid-gradient {
    position: absolute;
    inset: 0;
    pointer-events: none;
    background: radial-gradient(circle at 20% 20%, rgba(59, 130, 246, 0.35), transparent 55%),
        radial-gradient(circle at 80% 40%, rgba(14, 165, 233, 0.35), transparent 55%),
        radial-gradient(circle at 50% 80%, rgba(37, 99, 235, 0.25), transparent 60%);
    z-index: -1;
}

footer {
    padding: 1.5rem;
    text-align: center;
    color: rgba(255, 255, 255, 0.7);
    font-size: 0.95rem;
}

@media (max-width: 720px) {
    .hero-card {
        padding: 2.5rem;
    }

    .cta-group {
        flex-direction: column;
    }
}

.auth {
    min-height: 100vh;
    display: grid;
    place-items: center;
    background: radial-gradient(circle at top, rgba(37, 99, 235, 0.3), transparent 55%),
        linear-gradient(160deg, #111827 0%, #020617 60%);
    padding: 2rem;
}

.auth-card {
    width: min(400px, 100%);
    background: rgba(17, 24, 39, 0.85);
    border-radius: 20px;
    padding: 2.5rem;
    color: #f8fafc;
    box-shadow: 0 24px 64px rgba(15, 23, 42, 0.4);
}

.auth-card h1 {
    margin-bottom: 1.5rem;
    font-size: 2rem;
}

.auth-switch {
    margin-top: 1.5rem;
    text-align: center;
    color: rgba(226, 232, 240, 0.8);
}

.auth-switch a {
    color: #60a5fa;
}

.form {
    display: grid;
    gap: 1rem;
}

.form-field {
    display: grid;
    gap: 0.45rem;
}

.form-field span {
    font-weight: 600;
    color: #1e293b;
}

.form-field .hint {
    font-weight: 500;
    color: #94a3b8;
    margin-left: 0.35rem;
}

.form-field textarea {
    border: 1px solid rgba(148, 163, 184, 0.4);
    border-radius: 12px;
    padding: 0.75rem 1rem;
    font-size: 1rem;
    resize: vertical;
    min-height: 140px;
}

.page-auth .form-field span,
.page-auth .form-field small {
    color: rgba(226, 232, 240, 0.85);
}

.form-field input,
.form-field select {
    border: 1px solid rgba(148, 163, 184, 0.4);
    border-radius: 12px;
    padding: 0.75rem 1rem;
    font-size: 1rem;
    background: rgba(255, 255, 255, 0.95);
}

.page-auth .form-field input {
    background: rgba(15, 23, 42, 0.7);
    color: #f8fafc;
    border-color: rgba(148, 163, 184, 0.3);
}

.form-field small {
    color: #ef4444;
    font-size: 0.85rem;
}

.btn-full {
    width: 100%;
}

.alert {
    margin-bottom: 1.2rem;
    padding: 0.85rem 1rem;
    border-radius: 12px;
    background: rgba(59, 130, 246, 0.15);
    color: #1d4ed8;
}

.alert-success {
    background: rgba(34, 197, 94, 0.16);
    color: #15803d;
}

.alert-error {
    background: rgba(239, 68, 68, 0.16);
    color: #b91c1c;
}

.shell {
    min-height: 100vh;
    padding: 3rem clamp(1rem, 4vw, 4rem);
    background: #f8fafc;
}

.page-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    margin-bottom: 2rem;
}

.page-header h1 {
    margin: 0;
    font-size: clamp(2rem, 4vw, 2.75rem);
}

.page-header p {
    margin: 0.25rem 0 0;
    color: #64748b;
}

.page-nav {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.page-nav form {
    margin: 0;
}

.page-nav .btn-tertiary {
    background: rgba(15, 23, 42, 0.05);
    color: #0f172a;
}

.card {
    background: #fff;
    border-radius: 20px;
    padding: 1.75rem;
    box-shadow: 0 24px 50px rgba(15, 23, 42, 0.08);
    margin-bottom: 2rem;
}

.card h2 {
    margin-top: 0;
}

.form-inline {
    display: grid;
    gap: 1rem;
    align-items: end;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
}

.checkbox {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    color: #334155;
}

.checkbox input {
    width: 18px;
    height: 18px;
}

.file-grid {
    list-style: none;
    margin: 0;
    padding: 0;
    display: grid;
    gap: 1rem;
    grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
}

.file-grid li {
    border: 1px solid rgba(148, 163, 184, 0.3);
    border-radius: 16px;
    padding: 1rem;
    display: grid;
    gap: 0.5rem;
}

.file-grid small {
    color: #64748b;
}

.file-grid a {
    color: #2563eb;
    font-weight: 600;
}

.file-actions {
    display: flex;
    gap: 0.75rem;
}

.file-actions a {
    font-size: 0.95rem;
}

.file-desc {
    color: #475569;
    font-size: 0.95rem;
    line-height: 1.5;
    margin: 0;
}

.folder-list {
    list-style: none;
    padding: 0;
    margin: 0;
    display: grid;
    gap: 1rem;
}

.folder-list li {
    display: flex;
    justify-content: space-between;
    align-items: center;
    border: 1px solid rgba(148, 163, 184, 0.25);
    border-radius: 16px;
    padding: 1rem 1.25rem;
    gap: 1rem;
}

.folder-list li div {
    display: grid;
    gap: 0.3rem;
}

.folder-list small {
    color: #64748b;
}

.folder-list a {
    color: #2563eb;
}

.preview-image {
    max-width: 100%;
    border-radius: 16px;
    display: block;
    margin: 0 auto;
    background: #0f172a;
}

.profile {
    display: grid;
    gap: 0.75rem;
}

.profile span {
    display: block;
    font-size: 0.85rem;
    color: #64748b;
}

.profile strong {
    font-size: 1.05rem;
}

@media (max-width: 768px) {
    .page-header {
        flex-direction: column;
        align-items: flex-start;
    }

    .page-nav {
        width: 100%;
        flex-wrap: wrap;
    }
}