/* CSS Variables - Dark Mode (default) */
:root {
    --bg-gradient-1: #1a1a2e;
    --bg-gradient-2: #16213e;
    --text-primary: #e0e0e0;
    --text-secondary: #aaa;
    --text-muted: #888;
    --text-dimmed: #666;
    --card-bg: rgba(255, 255, 255, 0.05);
    --card-border: rgba(255, 255, 255, 0.1);
    --input-bg: rgba(0, 0, 0, 0.3);
    --input-border: rgba(255, 255, 255, 0.1);
    --progress-bg: rgba(0, 0, 0, 0.3);
    --shadow-color: rgba(0, 0, 0, 0.3);
    --accent-blue: #3498db;
    --accent-blue-hover: rgba(52, 152, 219, 0.3);
    --accent-red: #e74c3c;
    --accent-red-hover: rgba(231, 76, 60, 0.3);
    --btn-blue-bg: rgba(52, 152, 219, 0.2);
    --btn-red-bg: rgba(231, 76, 60, 0.2);
}

/* Light Mode */
[data-theme="light"] {
    --bg-gradient-1: #f5f7fa;
    --bg-gradient-2: #e4e8ed;
    --text-primary: #1a1a2e;
    --text-secondary: #555;
    --text-muted: #777;
    --text-dimmed: #999;
    --card-bg: rgba(255, 255, 255, 0.8);
    --card-border: rgba(0, 0, 0, 0.1);
    --input-bg: rgba(255, 255, 255, 0.9);
    --input-border: rgba(0, 0, 0, 0.15);
    --progress-bg: rgba(0, 0, 0, 0.1);
    --shadow-color: rgba(0, 0, 0, 0.1);
    --accent-blue: #2980b9;
    --accent-blue-hover: rgba(52, 152, 219, 0.2);
    --accent-red: #c0392b;
    --accent-red-hover: rgba(231, 76, 60, 0.2);
    --btn-blue-bg: rgba(52, 152, 219, 0.15);
    --btn-red-bg: rgba(231, 76, 60, 0.15);
}

/* Reset and base */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    background-color: var(--bg-gradient-1);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
    background-color: var(--bg-gradient-2);
    background: linear-gradient(135deg, var(--bg-gradient-1) 0%, var(--bg-gradient-2) 100%);
    min-height: 100vh;
    color: var(--text-primary);
    transition: background 0.3s, color 0.3s;
    overflow-x: hidden;
    padding-top: env(safe-area-inset-top);
    padding-bottom: env(safe-area-inset-bottom);
    padding-left: env(safe-area-inset-left);
    padding-right: env(safe-area-inset-right);
}

/* Theme toggle */
.theme-toggle {
    background: var(--btn-blue-bg);
    border: 1px solid var(--accent-blue);
    color: var(--accent-blue);
    border-radius: 8px;
    padding: 10px 20px;
    cursor: pointer;
    font-size: 1.1rem;
    transition: all 0.2s;
}

.theme-toggle:hover {
    background: var(--accent-blue-hover);
}

/* Login page */
.login-page {
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
}

.login-container {
    width: 100%;
    max-width: 450px;
    padding: 20px;
}

.login-box {
    background: var(--card-bg);
    backdrop-filter: blur(10px);
    border-radius: 16px;
    padding: 40px;
    border: 1px solid var(--card-border);
    box-shadow: 0 8px 32px var(--shadow-color);
}

.login-box h1 {
    text-align: center;
    margin-bottom: 8px;
    font-size: 2rem;
}

.login-box .subtitle {
    text-align: center;
    color: var(--text-muted);
    margin-bottom: 30px;
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    color: var(--text-secondary);
}

.form-group input {
    width: 100%;
    padding: 12px 16px;
    border: 1px solid var(--input-border);
    border-radius: 8px;
    background: var(--input-bg);
    color: var(--text-primary);
    font-size: 1rem;
    transition: border-color 0.3s;
}

.form-group input:focus {
    outline: none;
    border-color: var(--accent-blue);
}

.btn-login {
    width: 100%;
    padding: 14px;
    background: linear-gradient(135deg, #3498db 0%, #2980b9 100%);
    border: none;
    border-radius: 8px;
    color: #fff;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: transform 0.2s, box-shadow 0.2s;
}

.btn-login:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 20px rgba(52, 152, 219, 0.4);
}

.error-message {
    background: var(--btn-red-bg);
    border: 1px solid var(--accent-red);
    color: var(--accent-red);
    padding: 12px;
    border-radius: 8px;
    margin-bottom: 20px;
    text-align: center;
}

/* Dashboard */
.dashboard {
    max-width: 1400px;
    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(--card-border);
}

header h1 {
    font-size: 1.8rem;
}

.header-actions {
    display: flex;
    gap: 12px;
    align-items: center;
}

.btn-refresh, .btn-logout {
    padding: 10px 20px;
    border-radius: 8px;
    font-size: 0.9rem;
    cursor: pointer;
    transition: all 0.2s;
    text-decoration: none;
}

.btn-refresh {
    background: var(--btn-blue-bg);
    border: 1px solid var(--accent-blue);
    color: var(--accent-blue);
}

.btn-refresh:hover {
    background: var(--accent-blue-hover);
}

.btn-logout {
    background: var(--btn-red-bg);
    border: 1px solid var(--accent-red);
    color: var(--accent-red);
}

.btn-logout:hover {
    background: var(--accent-red-hover);
}

/* Status cards */
.current-status {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 20px;
    margin-bottom: 30px;
}

.status-card {
    background: var(--card-bg);
    backdrop-filter: blur(10px);
    border-radius: 16px;
    padding: 24px;
    border: 1px solid var(--card-border);
}

.status-card h3 {
    margin-bottom: 16px;
    font-size: 1.1rem;
    color: var(--text-secondary);
}

.progress-container {
    height: 12px;
    background: var(--progress-bg);
    border-radius: 6px;
    overflow: hidden;
    margin-bottom: 12px;
}

.progress-bar {
    height: 100%;
    border-radius: 6px;
    transition: width 0.5s ease, background 0.3s;
}

.progress-bar.ok {
    background: linear-gradient(90deg, #2ecc71, #27ae60);
}

.progress-bar.warning {
    background: linear-gradient(90deg, #f39c12, #e67e22);
}

.progress-bar.critical {
    background: linear-gradient(90deg, #e74c3c, #c0392b);
}

.status-details {
    display: flex;
    justify-content: space-between;
    font-size: 0.9rem;
}

.remaining {
    color: var(--text-primary);
    font-weight: 600;
}

.reset-time {
    color: var(--text-muted);
}

/* Prediction panel */
.prediction-panel {
    margin-bottom: 30px;
}

.prediction-panel h2 {
    margin-bottom: 20px;
}

.predictions {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 20px;
}

.prediction-card {
    background: var(--card-bg);
    backdrop-filter: blur(10px);
    border-radius: 16px;
    padding: 20px;
    border: 1px solid var(--card-border);
}

.prediction-card h4 {
    color: var(--text-secondary);
    margin-bottom: 12px;
    font-size: 0.95rem;
}

.prediction-status {
    font-size: 1.2rem;
    font-weight: 600;
    margin-bottom: 12px;
    padding: 8px 12px;
    border-radius: 8px;
}

.prediction-status.ok {
    background: rgba(46, 204, 113, 0.2);
    color: #27ae60;
}

.prediction-status.warning {
    background: rgba(231, 76, 60, 0.2);
    color: #c0392b;
}

.prediction-details p {
    margin-bottom: 6px;
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.prediction-details strong {
    color: var(--text-primary);
}

.no-data {
    color: var(--text-dimmed);
    font-style: italic;
}

/* Chart controls */
.chart-controls {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    margin-bottom: 20px;
    padding: 16px 20px;
    background: var(--card-bg);
    border-radius: 12px;
    border: 1px solid var(--card-border);
}

.chart-controls span {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.time-btn {
    padding: 8px 16px;
    border-radius: 6px;
    border: 1px solid var(--card-border);
    background: transparent;
    color: var(--text-secondary);
    cursor: pointer;
    font-size: 0.85rem;
    transition: all 0.2s;
}

.time-btn:hover {
    background: var(--accent-blue-hover);
    border-color: var(--accent-blue);
    color: var(--accent-blue);
}

.time-btn.active {
    background: var(--btn-blue-bg);
    border-color: var(--accent-blue);
    color: var(--accent-blue);
    font-weight: 600;
}

/* Charts */
.charts {
    display: grid;
    grid-template-columns: 1fr;
    gap: 20px;
    margin-bottom: 30px;
}

.chart-container {
    background: var(--card-bg);
    backdrop-filter: blur(10px);
    border-radius: 16px;
    padding: 24px;
    border: 1px solid var(--card-border);
    overflow: hidden;
}

.chart-container h2 {
    font-size: 1rem;
    color: var(--text-secondary);
    margin-bottom: 16px;
}

.chart-container canvas {
    height: 400px !important;
    max-width: 100%;
}

/* Footer */
footer {
    text-align: center;
    padding: 20px;
    color: var(--text-dimmed);
    font-size: 0.85rem;
}

/* Responsive */
@media (max-width: 768px) {
    .dashboard {
        padding: 12px;
        overflow-x: hidden;
    }

    header {
        flex-direction: column;
        gap: 12px;
        text-align: center;
    }

    header h1 {
        font-size: 1.4rem;
    }

    .header-actions {
        flex-wrap: wrap;
        justify-content: center;
    }

    .current-status {
        grid-template-columns: 1fr;
    }

    .predictions {
        grid-template-columns: 1fr;
    }

    .chart-controls {
        flex-wrap: wrap;
        gap: 8px;
        padding: 12px;
    }

    .time-btn {
        padding: 6px 12px;
        font-size: 0.8rem;
    }

    .charts {
        grid-template-columns: 1fr;
    }

    .chart-container {
        padding: 16px 12px;
        overflow: hidden;
    }

    .chart-container canvas {
        height: 250px !important;
        max-width: 100%;
    }

    .prediction-status {
        font-size: 1rem;
    }

    .prediction-details p {
        font-size: 0.85rem;
    }
}

@media (max-width: 380px) {
    .dashboard {
        padding: 8px;
    }

    header h1 {
        font-size: 1.2rem;
    }

    .btn-refresh, .btn-logout {
        padding: 8px 14px;
        font-size: 0.8rem;
    }

    .theme-toggle {
        padding: 8px 14px;
        font-size: 1rem;
    }

    .status-card {
        padding: 16px;
    }

    .chart-container canvas {
        height: 200px !important;
    }
}