:root {
    --primary-bg: #1a1a1a;
    --secondary-bg: #2a2a2a;
    --tertiary-bg: #3a3a3a;
    --primary-text: #e0e0e0;
    --secondary-text: #b0b0b0;
    --accent-color: #007bff;
    --accent-hover: #0056b3;
    --error-color: #dc3545;
    --success-color: #28a745;
    --border-color: #444;
    --font-family: 'Inter', sans-serif;
}

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

body {
    font-family: var(--font-family);
    background-color: var(--primary-bg);
    color: var(--primary-text);
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    padding: 2rem;
}

#app-container {
    width: 100%;
    max-width: 900px;
}

/* --- Login View --- */
#login-view {
    display: flex;
    justify-content: center;
    align-items: center;
}

.login-box {
    background-color: var(--secondary-bg);
    padding: 2.5rem;
    border-radius: 8px;
    border: 1px solid var(--border-color);
    text-align: center;
    width: 100%;
    max-width: 400px;
}

.login-box h1 {
    margin-bottom: 0.5rem;
    font-size: 1.5rem;
}

.login-box p {
    margin-bottom: 1.5rem;
    color: var(--secondary-text);
}

#login-form input {
    width: 100%;
    padding: 0.75rem;
    margin-bottom: 1rem;
    background-color: var(--tertiary-bg);
    border: 1px solid var(--border-color);
    border-radius: 4px;
    color: var(--primary-text);
    font-size: 1rem;
}

#login-form button {
    width: 100%;
    padding: 0.75rem;
    background-color: var(--accent-color);
    color: white;
    border: none;
    border-radius: 4px;
    font-size: 1rem;
    cursor: pointer;
    transition: background-color 0.3s ease;
}

#login-form button:hover {
    background-color: var(--accent-hover);
}

.error-message {
    color: var(--error-color);
    margin-top: 1rem;
    height: 1rem; /* Reserve space to prevent layout shift */
}

/* --- Main View --- */
header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--border-color);
}

header h1 {
    font-size: 2rem;
}

#logout-button {
    padding: 0.5rem 1rem;
    background-color: var(--tertiary-bg);
    color: var(--primary-text);
    border: 1px solid var(--border-color);
    border-radius: 4px;
    cursor: pointer;
    transition: background-color 0.3s ease;
}

#logout-button:hover {
    background-color: #4a4a4a;
}

main section {
    background-color: var(--secondary-bg);
    padding: 1.5rem;
    border-radius: 8px;
    border: 1px solid var(--border-color);
    margin-bottom: 2rem;
}

main h2 {
    margin-bottom: 1rem;
    font-size: 1.25rem;
    color: var(--primary-text);
}

/* --- Drop Zone --- */
#drop-zone {
    border: 2px dashed var(--border-color);
    border-radius: 8px;
    padding: 2rem;
    text-align: center;
    color: var(--secondary-text);
    cursor: pointer;
    transition: border-color 0.3s ease, background-color 0.3s ease;
}

#drop-zone.drag-over {
    border-color: var(--accent-color);
    background-color: #2e3c4a;
}

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

table {
    width: 100%;
    border-collapse: collapse;
}

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

th {
    background-color: var(--tertiary-bg);
    font-weight: 600;
}

td:last-child {
    text-align: right;
}

tbody tr:last-child td {
    border-bottom: none;
}

.action-button {
    background: none;
    border: 1px solid var(--border-color);
    color: var(--primary-text);
    padding: 0.4rem 0.8rem;
    margin-left: 0.5rem;
    border-radius: 4px;
    cursor: pointer;
    transition: background-color 0.3s ease, border-color 0.3s ease;
}

.action-button.delete {
    border-color: var(--error-color);
    color: var(--error-color);
}

.action-button:hover {
    background-color: var(--tertiary-bg);
}

.action-button.delete:hover {
    background-color: var(--error-color);
    color: var(--primary-text);
}

/* --- Notification Bar --- */
.notification {
    padding: 1rem;
    margin-bottom: 1rem;
    border-radius: 8px;
    background-color: var(--accent-color);
    color: white;
    text-align: center;
    display: none; /* Hidden by default */
    opacity: 0;
    transition: opacity 0.5s ease-in-out;
}

.notification.show {
    display: block;
    opacity: 1;
}


/* --- General --- */
.view {
    width: 100%;
}