:root {
    --bg-color: #0b0f19;
    --card-bg: #151f32;
    --text-main: #f3f4f6;
    --text-muted: #9ca3af;
    --accent-color: #f59e0b;
    --accent-dark: #d97706;
    --accent-glow: rgba(245, 158, 11, 0.12);
    --border-color: #24324d;
    --tag-bg: #1e293b;
    --danger: #ef4444;
    --danger-bg: rgba(239, 68, 68, 0.12);
    --success-color: #34d399;
    --success-bg: rgba(52, 211, 153, 0.12);
    --shadow: 0 10px 25px -5px rgba(0,0,0,0.3);
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    background: var(--bg-color);
    color: var(--text-main);
    line-height: 1.6;
}

.page {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 24px;
    gap: 16px;
}

.card {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 20px;
    box-shadow: var(--shadow);
    padding: 32px;
    width: 100%;
    max-width: 440px;
}

.card-wide { max-width: 800px; }
.card-narrow { max-width: 360px; }

h1 { margin: 0 0 8px; font-size: 22px; font-weight: 800; letter-spacing: -0.5px; color: var(--text-main); }
.subtitle { color: var(--text-muted); font-size: 14px; margin: 0 0 20px; }

label { display: block; font-size: 13px; font-weight: 600; margin: 16px 0 6px; color: var(--text-muted); }

input[type="text"], input[type="password"], select {
    width: 100%;
    padding: 10px 12px;
    border: 1px solid var(--border-color);
    border-radius: 10px;
    font-size: 14px;
    background: var(--bg-color);
    color: var(--text-main);
}
input[type="text"]:focus, input[type="password"]:focus, select:focus {
    outline: none;
    border-color: var(--accent-color);
}

.dropzone {
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    border: 2px dashed var(--border-color);
    border-radius: 14px;
    padding: 32px 16px;
    cursor: pointer;
    color: var(--text-muted);
    transition: border-color .15s, box-shadow .15s;
}
.dropzone.dragover { border-color: var(--accent-color); box-shadow: 0 0 0 4px var(--accent-glow); }
.dropzone input[type="file"] { display: none; }

.btn-primary {
    width: 100%;
    margin-top: 20px;
    padding: 11px 16px;
    background: var(--accent-color);
    color: #1a1206;
    border: none;
    border-radius: 12px;
    font-size: 15px;
    font-weight: 700;
    cursor: pointer;
    text-align: center;
    text-decoration: none;
    display: inline-block;
    transition: background .15s, transform .15s;
}
.btn-primary:hover { background: var(--accent-dark); transform: translateY(-1px); }
.btn-primary:disabled { opacity: .6; cursor: default; transform: none; }
.btn-link { box-sizing: border-box; }

.btn-small {
    padding: 5px 10px;
    font-size: 12px;
    border: 1px solid var(--border-color);
    background: var(--tag-bg);
    color: var(--text-main);
    border-radius: 8px;
    cursor: pointer;
}
.btn-small:hover { border-color: var(--accent-color); }
.btn-danger {
    padding: 5px 10px;
    font-size: 12px;
    border: 1px solid var(--danger);
    background: transparent;
    color: var(--danger);
    border-radius: 8px;
    cursor: pointer;
}
.btn-danger:hover { background: var(--danger-bg); }

.alert { padding: 12px 14px; border-radius: 12px; font-size: 14px; margin-bottom: 16px; border: 1px solid var(--border-color); }
.alert-error { background: var(--danger-bg); color: #fca5a5; border-color: rgba(239,68,68,0.3); }
.alert-success { background: var(--success-bg); color: #6ee7b7; border-color: rgba(52,211,153,0.3); }

.link-box { display: flex; gap: 8px; margin: 10px 0; }
.link-box input { flex: 1; }
.link-box button {
    padding: 0 14px;
    border: none;
    background: var(--accent-color);
    color: #1a1206;
    border-radius: 10px;
    cursor: pointer;
    font-size: 13px;
    font-weight: 700;
}

.hint { font-size: 12px; color: var(--text-muted); margin: 0; }

.admin-link {
    color: var(--text-muted);
    font-size: 13px;
    text-decoration: none;
}
.admin-link:hover { color: var(--accent-color); }

.back-link {
    display: inline-block;
    margin-top: 20px;
    font-size: 13px;
    color: var(--text-muted);
    text-decoration: none;
}
.back-link:hover { color: var(--accent-color); }

.admin-header { display: flex; align-items: center; justify-content: space-between; margin-bottom: 8px; }
.logout-link { font-size: 13px; color: var(--danger); text-decoration: none; }
.logout-link:hover { text-decoration: underline; }

.file-table { width: 100%; border-collapse: collapse; font-size: 13px; margin-top: 12px; }
.file-table th, .file-table td { text-align: left; padding: 8px 6px; border-bottom: 1px solid var(--border-color); white-space: nowrap; }
.file-table th { color: var(--text-muted); font-weight: 700; font-size: 11px; text-transform: uppercase; letter-spacing: 0.3px; }
.row-expired { opacity: 0.5; }

code { background: var(--tag-bg); color: #fef08a; padding: 2px 6px; border-radius: 6px; font-size: 12px; }

.details-row td { background: rgba(0,0,0,0.15); padding: 12px !important; }
.access-log-table { width: 100%; border-collapse: collapse; font-size: 12px; }
.access-log-table th, .access-log-table td { text-align: left; padding: 4px 8px; }
.access-log-table th { color: var(--text-muted); font-weight: 600; }

.file-info { background: var(--tag-bg); border-radius: 14px; padding: 16px; margin-bottom: 16px; border: 1px solid var(--border-color); }
.file-name { font-weight: 700; }
.file-meta { font-size: 12px; color: var(--text-muted); margin-top: 4px; }