:root {
    --bg-color: #0d1117;
    --card-bg: rgba(22, 27, 34, 0.7);
    --primary-color: #58a6ff;
    --primary-hover: #1f6feb;
    --text-color: #c9d1d9;
    --border-color: #30363d;
    --success-color: #238636;
    --danger-color: #da3633;
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

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

body {
    font-family: var(--font-family);
    background-color: var(--bg-color);
    color: var(--text-color);
    display: flex;
    justify-content: center;
    align-items: flex-start;
    padding-top: 10vh;
    min-height: 100vh;
    background-image: radial-gradient(circle at 50% 10%, #1f2530 0%, var(--bg-color) 60%);
}

.container {
    width: 100%;
    max-width: 600px;
    padding: 2rem;
}

/* Glass Card */
.card {
    background: var(--card-bg);
    backdrop-filter: blur(10px);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 2rem;
    box-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.3);
}

h1,
h2 {
    color: #fff;
    margin-bottom: 1.5rem;
    text-align: center;
    font-weight: 600;
}

/* Upload Zone */
.upload-zone {
    border: 2px dashed var(--border-color);
    border-radius: 8px;
    padding: 3rem 1.5rem;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s ease;
    margin-bottom: 1.5rem;
}

.upload-zone:hover,
.upload-zone.dragover {
    border-color: var(--primary-color);
    background: rgba(88, 166, 255, 0.1);
}

.upload-icon {
    font-size: 3rem;
    color: var(--primary-color);
    margin-bottom: 1rem;
    display: block;
}

/* Button */
.btn {
    display: inline-block;
    background-color: var(--primary-color);
    color: #fff;
    padding: 0.75rem 1.5rem;
    border-radius: 6px;
    text-decoration: none;
    font-weight: 500;
    border: none;
    cursor: pointer;
    transition: background-color 0.2s;
    font-size: 1rem;
    width: 100%;
}

.btn:hover {
    background-color: var(--primary-hover);
}

.btn-danger {
    background-color: var(--danger-color);
}

.btn-danger:hover {
    background-color: #a02624;
}

/* Result Area */
.result-area {
    margin-top: 2rem;
    display: none;
    animation: fadeIn 0.4s ease-out;
}

.success-message {
    color: var(--success-color);
    text-align: center;
    margin-bottom: 1rem;
    font-weight: 500;
}

.url-box {
    display: flex;
    background: rgba(0, 0, 0, 0.3);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    padding: 0.5rem;
    align-items: center;
}

.url-box input {
    background: transparent;
    border: none;
    color: var(--text-color);
    flex-grow: 1;
    margin-right: 0.5rem;
    padding: 0.5rem;
    font-family: monospace;
    outline: none;
}

.copy-btn {
    background: var(--border-color);
    color: #fff;
    border: none;
    padding: 0.4rem 0.8rem;
    border-radius: 4px;
    cursor: pointer;
    font-size: 0.9rem;
}

.copy-btn:hover {
    background: #444c56;
}

/* Admin Dashboard */
.admin-container {
    max-width: 1000px;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
    margin-bottom: 2rem;
}

.stat-card {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    padding: 1.5rem;
    border-radius: 8px;
    text-align: center;
}

.stat-value {
    font-size: 2rem;
    font-weight: 700;
    color: #fff;
}

.stat-label {
    color: #8b949e;
    font-size: 0.9rem;
    margin-top: 0.5rem;
}

.qr-code-container {
    margin: 1.5rem auto;
    padding: 1rem;
    background: #fff;
    border-radius: 8px;
    width: fit-content;
    display: flex;
    justify-content: center;
    align-items: center;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

.file-list {
    width: 100%;
    border-collapse: collapse;
    margin-top: 1rem;
    font-size: 0.9rem;
}

.file-list th,
.file-list td {
    padding: 0.75rem;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

.file-list th {
    color: #8b949e;
    font-weight: 600;
}

.file-list tr:hover {
    background: rgba(255, 255, 255, 0.03);
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }

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

/* Loader */
.loader {
    border: 4px solid var(--border-color);
    border-top: 4px solid var(--primary-color);
    border-radius: 50%;
    width: 30px;
    height: 30px;
    animation: spin 1s linear infinite;
    margin: 0 auto;
    display: none;
}

@keyframes spin {
    0% {
        transform: rotate(0deg);
    }

    100% {
        transform: rotate(360deg);
    }
}