/* ============================================
   DESIGN TOKENS
   ============================================ */
:root {
    /* Background layers */
    --bg-base: #07080d;
    --bg-surface: rgba(15, 18, 28, 0.65);
    --bg-card: rgba(22, 27, 45, 0.55);
    --bg-card-hover: rgba(30, 36, 58, 0.65);
    --bg-elevated: rgba(35, 42, 68, 0.5);

    /* Glass properties */
    --glass-blur: 20px;
    --glass-border: rgba(255, 255, 255, 0.08);
    --glass-border-hover: rgba(255, 255, 255, 0.14);
    --glass-shine: linear-gradient(
        135deg,
        rgba(255, 255, 255, 0.06) 0%,
        rgba(255, 255, 255, 0.02) 40%,
        rgba(255, 255, 255, 0) 100%
    );

    /* Text */
    --text: #eaecf0;
    --text-secondary: #a1a7b4;
    --text-muted: #6b7280;
    --text-bright: #ffffff;

    /* Accent gradient */
    --accent: #3b82f6;
    --accent-end: #06b6d4;
    --accent-gradient: linear-gradient(135deg, var(--accent), var(--accent-end));
    --accent-glow: rgba(59, 130, 246, 0.25);

    /* Status colors */
    --green: #34d399;
    --green-glow: rgba(52, 211, 153, 0.2);
    --red: #f87171;
    --red-glow: rgba(248, 113, 113, 0.2);
    --yellow: #fbbf24;
    --yellow-glow: rgba(251, 191, 36, 0.2);
    --blue: #60a5fa;
    --blue-glow: rgba(96, 165, 250, 0.2);
    --purple: #a78bfa;

    /* Spacing & Shape */
    --radius: 12px;
    --radius-lg: 20px;
    --radius-sm: 8px;

    /* Shadows */
    --shadow-card: 0 4px 24px rgba(0, 0, 0, 0.3), 0 1px 2px rgba(0, 0, 0, 0.2);
    --shadow-elevated: 0 8px 40px rgba(0, 0, 0, 0.4), 0 2px 8px rgba(0, 0, 0, 0.3);

    /* Transitions */
    --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
    --transition-fast: 0.15s var(--ease-out);
    --transition-normal: 0.3s var(--ease-out);
}

/* ============================================
   RESET
   ============================================ */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

/* ============================================
   BACKGROUND — Mesh Gradient
   ============================================ */
body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: var(--bg-base);
    color: var(--text);
    line-height: 1.6;
    min-height: 100vh;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body::before {
    content: '';
    position: fixed;
    inset: 0;
    z-index: -1;
    background:
        radial-gradient(ellipse 80% 60% at 10% 20%, rgba(59, 130, 246, 0.12) 0%, transparent 60%),
        radial-gradient(ellipse 60% 50% at 85% 30%, rgba(6, 182, 212, 0.08) 0%, transparent 55%),
        radial-gradient(ellipse 70% 60% at 50% 90%, rgba(167, 139, 250, 0.07) 0%, transparent 55%),
        var(--bg-base);
    pointer-events: none;
}

/* ============================================
   TYPOGRAPHY
   ============================================ */
h1 {
    font-size: 1.75rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    color: var(--text-bright);
    margin-bottom: 1.5rem;
}

h2 {
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.08em;
    margin-bottom: 1rem;
}

/* Tabular figures for all numeric data */
.energy-value,
.battery-value,
.summary-value,
.stat-value {
    font-variant-numeric: tabular-nums;
    font-feature-settings: 'tnum';
}

/* ============================================
   GLASS NAVBAR
   ============================================ */
.navbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.75rem 1.5rem;
    background: var(--bg-surface);
    backdrop-filter: blur(var(--glass-blur));
    -webkit-backdrop-filter: blur(var(--glass-blur));
    border-bottom: 1px solid var(--glass-border);
    position: sticky;
    top: 0;
    z-index: 100;
}

.navbar::after {
    content: '';
    position: absolute;
    bottom: -1px;
    left: 5%;
    right: 5%;
    height: 1px;
    background: linear-gradient(
        90deg,
        transparent,
        rgba(59, 130, 246, 0.3),
        rgba(6, 182, 212, 0.2),
        transparent
    );
    pointer-events: none;
}

.navbar-brand a {
    color: var(--text-bright);
    text-decoration: none;
    font-size: 1.15rem;
    font-weight: 700;
    letter-spacing: -0.01em;
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.navbar-links {
    display: flex;
    gap: 0.25rem;
}

.nav-link {
    color: var(--text-secondary);
    text-decoration: none;
    padding: 0.4rem 0.85rem;
    border-radius: var(--radius-sm);
    font-size: 0.9rem;
    font-weight: 500;
    transition: color var(--transition-fast), background var(--transition-fast);
}

.nav-link:hover {
    color: var(--text-bright);
    background: rgba(255, 255, 255, 0.06);
}

.nav-link.active {
    color: var(--text-bright);
    background: rgba(59, 130, 246, 0.15);
}

/* ============================================
   CONTAINER + LAYOUT
   ============================================ */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 1.5rem;
}

/* ============================================
   GRID
   ============================================ */
.grid {
    display: grid;
    gap: 1.25rem;
    margin-bottom: 1.25rem;
}

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

.grid-2 {
    grid-template-columns: repeat(2, 1fr);
}

/* ============================================
   GLASS CARDS
   ============================================ */
.card {
    position: relative;
    background: var(--bg-card);
    backdrop-filter: blur(var(--glass-blur));
    -webkit-backdrop-filter: blur(var(--glass-blur));
    border: 1px solid var(--glass-border);
    border-radius: var(--radius);
    padding: 1.5rem;
    box-shadow: var(--shadow-card);
    transition: background var(--transition-normal),
                border-color var(--transition-normal),
                box-shadow var(--transition-normal);
    overflow: hidden;
}

/* Glass shine overlay */
.card::before {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: inherit;
    background: var(--glass-shine);
    pointer-events: none;
}

.card:hover {
    background: var(--bg-card-hover);
    border-color: var(--glass-border-hover);
    box-shadow: var(--shadow-elevated);
}

.card h2 {
    position: relative;
}

/* ============================================
   ENERGY FLOW
   ============================================ */
.energy-flow {
    position: relative;
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1rem;
    text-align: center;
}

.energy-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
    padding: 1rem 0.5rem;
    border-radius: var(--radius-sm);
    transition: background var(--transition-fast);
}

.energy-item:hover {
    background: rgba(255, 255, 255, 0.03);
}

.energy-icon {
    width: 36px;
    height: 36px;
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.1rem;
    margin-bottom: 0.15rem;
}

.energy-icon.grid-icon {
    background: var(--red-glow);
    color: var(--red);
}
.energy-icon.pv-icon {
    background: var(--yellow-glow);
    color: var(--yellow);
}
.energy-icon.home-icon {
    background: var(--blue-glow);
    color: var(--blue);
}

.energy-label {
    font-size: 0.8rem;
    font-weight: 500;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.energy-value {
    font-size: 1.6rem;
    font-weight: 700;
    line-height: 1;
}

.energy-unit {
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--text-secondary);
    margin-left: 0.15em;
}

.energy-value.import { color: var(--red); }
.energy-value.export { color: var(--green); }
.energy-value.production { color: var(--yellow); }
.energy-value.consumption { color: var(--blue); }

/* ============================================
   BATTERY
   ============================================ */
.battery-info {
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
}

.battery-soc {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.battery-power-info {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.battery-label {
    color: var(--text-secondary);
    font-size: 0.9rem;
    font-weight: 500;
}

.battery-value {
    font-size: 1.4rem;
    font-weight: 700;
}

.battery-value.charging { color: var(--green); }
.battery-value.discharging { color: var(--yellow); }

/* Battery gauge bar */
.battery-gauge {
    width: 100%;
    height: 8px;
    background: rgba(255, 255, 255, 0.06);
    border-radius: 4px;
    overflow: hidden;
    position: relative;
}

.battery-gauge-fill {
    height: 100%;
    border-radius: 4px;
    background: var(--accent-gradient);
    transition: width 0.8s var(--ease-out);
    position: relative;
}

.battery-gauge-fill::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(90deg, transparent 60%, rgba(255,255,255,0.2));
    border-radius: inherit;
}

.battery-gauge-fill.low {
    background: linear-gradient(90deg, var(--red), var(--yellow));
}

.battery-gauge-fill.medium {
    background: linear-gradient(90deg, var(--yellow), var(--green));
}

.battery-gauge-fill.high {
    background: var(--accent-gradient);
}

/* ============================================
   SUMMARY STATS
   ============================================ */
.summary-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 0.75rem;
}

.summary-item {
    display: flex;
    flex-direction: column;
    gap: 0.35rem;
    padding: 0.85rem 1rem;
    background: rgba(255, 255, 255, 0.02);
    border-radius: var(--radius-sm);
    border: 1px solid rgba(255, 255, 255, 0.04);
    transition: background var(--transition-fast), border-color var(--transition-fast);
}

.summary-item:hover {
    background: rgba(255, 255, 255, 0.04);
    border-color: rgba(255, 255, 255, 0.07);
}

.summary-label {
    font-size: 0.75rem;
    font-weight: 500;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.summary-value {
    font-size: 1.15rem;
    font-weight: 700;
    color: var(--text);
}

.summary-value .import { color: var(--red); }
.summary-value .export { color: var(--green); }
.summary-value.production { color: var(--yellow); }
.summary-value.consumption { color: var(--blue); }

/* ============================================
   LOADPOINTS
   ============================================ */
.loadpoints-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 1rem;
}

.loadpoint-card {
    background: var(--bg-surface);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius);
    padding: 1.25rem;
    transition: background var(--transition-fast), border-color var(--transition-fast);
}

.loadpoint-card:hover {
    background: var(--bg-card);
    border-color: var(--glass-border-hover);
}

.loadpoint-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
    padding-bottom: 0.75rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.loadpoint-id {
    font-weight: 600;
    color: var(--text-bright);
}

.vehicle-name {
    color: var(--text-secondary);
    font-size: 0.8rem;
    font-weight: 500;
}

.loadpoint-stats {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.loadpoint-stats > div {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.stat-label {
    color: var(--text-muted);
    font-size: 0.85rem;
}

.stat-value {
    font-weight: 600;
    color: var(--text);
}

.no-data {
    color: var(--text-muted);
    text-align: center;
    padding: 2rem 1rem;
    font-size: 0.9rem;
}

/* ============================================
   CHART CONTROLS + CHART BOXES
   ============================================ */
.chart-controls {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.chart-controls label {
    color: var(--text-secondary);
    font-size: 0.9rem;
    font-weight: 500;
}

.chart-controls select {
    background: var(--bg-surface);
    color: var(--text);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-sm);
    padding: 0.45rem 0.85rem;
    font-size: 0.9rem;
    font-family: inherit;
    cursor: pointer;
    transition: border-color var(--transition-fast);
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg width='10' height='6' viewBox='0 0 10 6' fill='none' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M1 1L5 5L9 1' stroke='%236b7280' stroke-width='1.5' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 0.7rem center;
    padding-right: 2rem;
}

.chart-controls select:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 2px var(--accent-glow);
}

.chart-box {
    position: relative;
    min-height: 300px;
}

/* ============================================
   SETTINGS PAGE
   ============================================ */
.settings-page {
    max-width: 480px;
}

.settings-page p {
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
    line-height: 1.7;
}

.qr-container {
    background: #ffffff;
    border-radius: var(--radius);
    padding: 1.5rem;
    display: inline-block;
}

.qr-container svg {
    display: block;
}

.settings-warning {
    padding: 1rem 1.25rem;
    background: var(--red-glow);
    border: 1px solid rgba(248, 113, 113, 0.2);
    border-radius: var(--radius-sm);
    color: var(--text);
}

.settings-warning code {
    background: rgba(255, 255, 255, 0.08);
    padding: 0.15em 0.4em;
    border-radius: 4px;
    font-size: 0.9em;
}

/* ============================================
   LOGIN PAGE
   ============================================ */
.login-wrapper {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    padding: 1.5rem;
}

.login-card {
    position: relative;
    background: var(--bg-card);
    backdrop-filter: blur(24px);
    -webkit-backdrop-filter: blur(24px);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-lg);
    padding: 2.5rem;
    width: 100%;
    max-width: 380px;
    box-shadow: var(--shadow-elevated);
    overflow: hidden;
}

.login-card::before {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: inherit;
    background: var(--glass-shine);
    pointer-events: none;
}

.login-card::after {
    content: '';
    position: absolute;
    top: -1px;
    left: 15%;
    right: 15%;
    height: 2px;
    background: var(--accent-gradient);
    border-radius: 2px;
    opacity: 0.7;
}

.login-card h1 {
    font-size: 1.4rem;
    margin-bottom: 2rem;
    text-align: center;
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.login-card input[type="password"] {
    width: 100%;
    padding: 0.7rem 1rem;
    background: var(--bg-surface);
    color: var(--text);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-sm);
    font-size: 1rem;
    font-family: inherit;
    margin-bottom: 1rem;
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.login-card input[type="password"]:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 3px var(--accent-glow);
}

.login-card button {
    position: relative;
    width: 100%;
    padding: 0.7rem;
    background: var(--accent-gradient);
    color: var(--text-bright);
    border: none;
    border-radius: var(--radius-sm);
    font-size: 1rem;
    font-weight: 600;
    font-family: inherit;
    cursor: pointer;
    transition: opacity var(--transition-fast), transform var(--transition-fast);
}

.login-card button:hover {
    opacity: 0.9;
    transform: translateY(-1px);
}

.login-card button:active {
    transform: translateY(0);
}

.login-error {
    color: var(--red);
    font-size: 0.9rem;
    text-align: center;
    margin-bottom: 1rem;
    padding: 0.5rem;
    background: var(--red-glow);
    border-radius: var(--radius-sm);
}

/* ============================================
   ANIMATIONS
   ============================================ */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(12px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes pulseGlow {
    0%, 100% { opacity: 0.5; }
    50% { opacity: 1; }
}

/* Staggered card entrance */
.card {
    animation: fadeInUp 0.4s var(--ease-out) both;
}

.grid .card:nth-child(1) { animation-delay: 0s; }
.grid .card:nth-child(2) { animation-delay: 0.06s; }
.grid .card:nth-child(3) { animation-delay: 0.12s; }
.grid .card:nth-child(4) { animation-delay: 0.18s; }

/* Login entrance */
.login-card {
    animation: fadeInUp 0.5s var(--ease-out) both;
}

/* Live data pulse indicator */
.live-dot {
    display: inline-block;
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--green);
    margin-right: 0.4rem;
    vertical-align: middle;
    animation: pulseGlow 2s ease-in-out infinite;
}

/* ============================================
   RESPONSIVE
   ============================================ */
@media (max-width: 768px) {
    .grid-2 {
        grid-template-columns: 1fr;
    }

    .container {
        padding: 1rem;
    }

    h1 {
        font-size: 1.4rem;
    }

    .card {
        padding: 1.25rem;
        border-radius: var(--radius-sm);
    }

    .energy-flow {
        gap: 0.5rem;
    }

    .energy-value {
        font-size: 1.3rem;
    }

    .energy-icon {
        width: 30px;
        height: 30px;
        font-size: 0.95rem;
    }

    .summary-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .navbar {
        padding: 0.6rem 1rem;
    }

    .navbar-brand a {
        font-size: 1rem;
    }

    .nav-link {
        font-size: 0.8rem;
        padding: 0.35rem 0.6rem;
    }

    .login-card {
        padding: 2rem 1.5rem;
        border-radius: var(--radius);
    }
}

@media (max-width: 480px) {
    .summary-grid {
        grid-template-columns: 1fr;
    }

    .energy-flow {
        grid-template-columns: 1fr;
        gap: 0.75rem;
    }

    .energy-item {
        flex-direction: row;
        justify-content: space-between;
        padding: 0.75rem;
    }

    .navbar-links {
        gap: 0.1rem;
    }
}

/* ============================================
   REDUCED MOTION
   ============================================ */
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        transition-duration: 0.01ms !important;
    }
}