:root {
    --bg-color: #121212;
    --card-bg: #1e1e1e;
    --text-color: #e0e0e0;
    --accent-color: #3b82f6;
    --accent-hover: #2563eb;
    --danger-color: #ef4444;
    --border-color: #333;
    --input-bg: #2d2d2d;
}

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

body {
    font-family: 'Noto Sans KR', sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    line-height: 1.6;
}

.container {
    max-width: 1000px;
    margin: 0 auto;
    padding: 20px;
}

header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 30px;
    padding-bottom: 20px;
    border-bottom: 1px solid var(--border-color);
}

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--accent-color);
}

.user-info {
    display: flex;
    align-items: center;
    gap: 15px;
}

/* Auth Pages */
.login-container {
    max-width: 400px;
    margin: 100px auto;
    padding: 40px;
    background-color: var(--card-bg);
    border-radius: 10px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.3);
    text-align: center;
}

.login-container h2 {
    margin-bottom: 20px;
    color: var(--accent-color);
}

.login-container input {
    width: 100%;
    padding: 12px;
    margin-bottom: 15px;
    background-color: var(--input-bg);
    border: 1px solid var(--border-color);
    border-radius: 5px;
    color: white;
}

.login-container button {
    width: 100%;
    padding: 12px;
    background-color: var(--accent-color);
    color: white;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    font-weight: bold;
    transition: background 0.3s;
}

.login-container button:hover {
    background-color: var(--accent-hover);
}

.guest-btn {
    background-color: #10b981 !important;
    margin-top: 10px;
}

.guest-btn:hover {
    background-color: #059669 !important;
}

/* Dashboard */
section {
    background-color: var(--card-bg);
    padding: 20px;
    border-radius: 10px;
    margin-bottom: 20px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.2);
}

section h3 {
    margin-bottom: 15px;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 10px;
}

.upload-form {
    display: flex;
    gap: 10px;
    align-items: flex-start; /* Align top if multiple lines */
}

.file-input-group {
    flex-grow: 1;
    display: flex;
    align-items: center;
    gap: 10px;
    background: var(--input-bg);
    padding: 10px;
    border-radius: 5px;
    border: 1px solid var(--border-color);
}

input[type="file"] {
    display: none;
}

.file-label {
    background-color: #4b5563;
    color: white;
    padding: 8px 15px;
    border-radius: 5px;
    cursor: pointer;
    font-size: 0.9rem;
}

.file-label:hover {
    background-color: #374151;
}

#file-name {
    color: #9ca3af;
    font-size: 0.9rem;
}

.upload-note {
    font-size: 0.8rem;
    color: #6b7280;
    margin-top: 5px;
}

/* Buttons */
.btn {
    padding: 8px 16px;
    text-decoration: none;
    border-radius: 5px;
    font-weight: 500;
    display: inline-block;
    border: none;
    cursor: pointer;
    font-size: 0.9rem;
}

.btn-logout {
    background-color: #4b5563;
    color: white;
}

.btn-upload {
    background-color: var(--accent-color);
    color: white;
    height: 44px; /* Match input height */
}

.btn-sm {
    padding: 5px 10px;
    font-size: 0.8rem;
}

.btn-download {
    background-color: #10b981;
    color: white;
}

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

/* Table */
.table-container {
    overflow-x: auto;
}

table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 10px;
}

th, td {
    padding: 12px 15px;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

th {
    background-color: #2d2d2d;
    font-weight: 600;
    color: var(--accent-color);
}

tr:hover {
    background-color: #2d2d2d;
}

.alert {
    padding: 10px;
    border-radius: 5px;
    margin-bottom: 15px;
}

.alert.success {
    background-color: rgba(16, 185, 129, 0.2);
    color: #10b981;
    border: 1px solid #10b981;
}

.error {
    color: var(--danger-color);
    margin-bottom: 10px;
}