/* Reset a základné štýly */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: linear-gradient(135deg, #1a1a2e 0%, #16213e 100%);
    min-height: 100vh;
    color: #fff;
    line-height: 1.6;
}

.container {
    max-width: 800px;
    margin: 0 auto;
    padding: 2rem;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Header */
header {
    text-align: center;
    margin-bottom: 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

header h1 {
    font-size: 1.8rem;
    font-weight: 300;
    flex: 1;
}

/* Teplotné karty */
.temperature-cards {
    display: flex;
    gap: 1.5rem;
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: 2rem;
}

.temp-card {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    border-radius: 20px;
    padding: 2rem;
    text-align: center;
    min-width: 200px;
    transition: transform 0.3s ease;
}

.temp-card:hover {
    transform: translateY(-5px);
}

.temp-card.outdoor {
    border: 2px solid #3498db;
}

.temp-card.indoor {
    border: 2px solid #e74c3c;
}

.temp-icon {
    font-size: 3rem;
    margin-bottom: 0.5rem;
}

.temp-label {
    font-size: 0.9rem;
    color: rgba(255, 255, 255, 0.7);
    margin-bottom: 0.5rem;
}

.temp-value {
    font-size: 3rem;
    font-weight: 700;
}

/* Menšie karty pre dashboard */
.temperature-cards.small .temp-card {
    padding: 1rem;
    min-width: 120px;
}

.temperature-cards.small .temp-value {
    font-size: 1.8rem;
}

/* Posledná aktualizácia */
.last-update {
    text-align: center;
    color: rgba(255, 255, 255, 0.5);
    font-size: 0.85rem;
}

/* Footer / Login link */
footer {
    margin-top: auto;
    text-align: center;
    padding-top: 2rem;
}

.login-link {
    color: rgba(255, 255, 255, 0.5);
    text-decoration: none;
    font-size: 0.9rem;
    transition: color 0.3s;
}

.login-link:hover {
    color: #fff;
}

/* Formuláre */
.login-form {
    max-width: 300px;
    margin: 0 auto;
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    color: rgba(255, 255, 255, 0.8);
}

.form-group input {
    width: 100%;
    padding: 0.75rem 1rem;
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 8px;
    background: rgba(255, 255, 255, 0.1);
    color: #fff;
    font-size: 1rem;
}

.form-group input:focus {
    outline: none;
    border-color: #3498db;
}

/* Tlačidlá */
.btn {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: 8px;
    font-size: 1rem;
    cursor: pointer;
    transition: all 0.3s;
    text-decoration: none;
}

.btn-primary {
    background: #3498db;
    color: #fff;
    width: 100%;
}

.btn-primary:hover {
    background: #2980b9;
}

.btn-logout {
    background: rgba(231, 76, 60, 0.2);
    color: #e74c3c;
    font-size: 0.85rem;
    padding: 0.5rem 1rem;
}

.btn-logout:hover {
    background: rgba(231, 76, 60, 0.4);
}

/* Error message */
.error-message {
    background: rgba(231, 76, 60, 0.2);
    border: 1px solid #e74c3c;
    color: #e74c3c;
    padding: 0.75rem 1rem;
    border-radius: 8px;
    margin-bottom: 1.5rem;
    text-align: center;
}

/* Back link */
.back-link {
    text-align: center;
    margin-top: 2rem;
}

.back-link a {
    color: rgba(255, 255, 255, 0.5);
    text-decoration: none;
}

.back-link a:hover {
    color: #fff;
}

/* Graf */
.chart-container {
    background: rgba(255, 255, 255, 0.05);
    border-radius: 20px;
    padding: 1.5rem;
    margin-bottom: 1.5rem;
}

.chart-container h2 {
    font-size: 1.1rem;
    font-weight: 400;
    margin-bottom: 1rem;
    color: rgba(255, 255, 255, 0.8);
}

.chart-container canvas {
    height: 300px !important;
}

/* Chart controls */
.chart-controls {
    display: flex;
    gap: 0.5rem;
    justify-content: center;
    flex-wrap: wrap;
}

.chart-controls .btn {
    background: rgba(255, 255, 255, 0.1);
    color: rgba(255, 255, 255, 0.7);
    padding: 0.5rem 1rem;
    font-size: 0.85rem;
}

.chart-controls .btn:hover,
.chart-controls .btn.active {
    background: rgba(52, 152, 219, 0.3);
    color: #fff;
}

/* Dashboard layout */
.dashboard header {
    text-align: left;
}

/* Responsive */
@media (max-width: 600px) {
    .container {
        padding: 1rem;
    }

    header h1 {
        font-size: 1.4rem;
    }

    .temp-card {
        min-width: 140px;
        padding: 1.5rem;
    }

    .temp-value {
        font-size: 2.2rem;
    }

    .temp-icon {
        font-size: 2rem;
    }
}