/* web/style.css - Optimized for Mobile & Desktop */
:root {
    --bg-color: #f6f5f4;
    --text-color: #2e3436;
    --card-bg: #ffffff;
    --accent-color: #3584e4;
    --secondary-bg: #ebebeb;
    --border-color: #cdc7c2;
    --input-bg: #ffffff;
    --shadow: 0 2px 5px rgba(0,0,0,0.08);
    --font-family: system-ui, -apple-system, sans-serif;
    --header-height: 56px;
    --day-bg: rgba(135, 206, 235, 0.1);
    --night-bg: rgba(0, 0, 0, 0.05);
}

@media (prefers-color-scheme: dark) {
    :root {
        --bg-color: #1e1e1e;
        --text-color: #eeeeec;
        --card-bg: #2d2d2d;
        --accent-color: #62a0ea;
        --secondary-bg: #353535;
        --border-color: #454545;
        --input-bg: #3d3d3d;
        --shadow: 0 2px 10px rgba(0,0,0,0.3);
        --day-bg: rgba(30, 60, 90, 0.3);
        --night-bg: rgba(0, 0, 0, 0.4);
    }
}

body {
    margin: 0; padding: 0;
    font-family: var(--font-family);
    background-color: var(--bg-color);
    color: var(--text-color);
    display: flex; flex-direction: column;
    height: 100vh; overflow: hidden;
}

header {
    height: var(--header-height);
    background-color: var(--card-bg);
    border-bottom: 1px solid var(--border-color);
    padding: 0 1rem;
    display: flex; align-items: center; justify-content: space-between;
    z-index: 100; flex-shrink: 0;
}

header h1 { margin: 0; font-size: 1.1rem; font-weight: 600; }

.nav-link {
    text-decoration: none;
    color: var(--text-color);
    font-weight: 600;
    font-size: 0.85rem;
    display: inline-flex;
    align-items: center;
    padding: 0.4rem 0.8rem;
    border-radius: 8px;
    background-color: var(--secondary-bg);
    border: 1px solid var(--border-color);
    transition: all 0.2s ease;
}

.nav-link:hover {
    background-color: var(--card-bg);
    box-shadow: var(--shadow);
    transform: translateX(-3px);
}

.main-container {
    display: flex; flex: 1; overflow: hidden;
}

/* Sidebar behavior */
.sidebar {
    width: 340px;
    background-color: var(--bg-color);
    border-right: 1px solid var(--border-color);
    padding: 1.25rem;
    overflow-y: auto;
    transition: transform 0.3s ease;
}

.chart-area {
    flex: 1;
    display: flex; flex-direction: column;
    background-color: var(--card-bg);
    position: relative;
    padding: 1rem;
}

/* Mobile responsive layout */
@media (max-width: 900px) {
    .main-container { flex-direction: column; overflow-y: auto; }
    .sidebar { width: 100%; border-right: none; border-bottom: 1px solid var(--border-color); overflow-y: visible; }
    .chart-area { height: 450px; flex: none; order: -1; } /* Chart on top for mobile */
}

.card {
    background-color: var(--card-bg);
    border-radius: 12px;
    padding: 1.25rem;
    margin-bottom: 1rem;
    box-shadow: var(--shadow);
    border: 1px solid var(--border-color);
}

.card-title {
    font-size: 0.75rem; font-weight: 700;
    text-transform: uppercase; letter-spacing: 0.05em;
    margin-bottom: 1rem; opacity: 0.6;
}

.form-grid {
    display: grid; grid-template-columns: 1fr 1fr; gap: 0.75rem;
}

.form-group { margin-bottom: 0.75rem; }
.form-group label { display: block; font-size: 0.8rem; margin-bottom: 0.25rem; opacity: 0.9; }

input {
    width: 100%; padding: 0.5rem 0.75rem;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    background-color: var(--input-bg);
    color: var(--text-color);
    font-size: 0.9rem;
    box-sizing: border-box;
    transition: border-color 0.2s;
}

input:focus { outline: none; border-color: var(--accent-color); }

button {
    background-color: var(--accent-color);
    color: white; border: none;
    padding: 0.6rem 1rem; border-radius: 8px;
    cursor: pointer; font-weight: 600; font-size: 0.9rem;
    width: 100%; transition: all 0.2s ease;
}

button:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(0,0,0,0.15);
    opacity: 0.9;
}

button:active:not(:disabled) {
    transform: translateY(0);
}

button:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

button.secondary {
    background-color: var(--secondary-bg);
    color: var(--text-color);
    border: 1px solid var(--border-color);
}

button.secondary:hover:not(:disabled) {
    background-color: var(--card-bg);
}

.info-display {
    font-size: 0.95rem; line-height: 1.6;
    color: var(--text-color);
}

.highlight { color: var(--accent-color); font-weight: 600; }

canvas { width: 100% !important; height: 100% !important; }

/* Status indicator for geolocation */
#geo-status {
    font-size: 0.75rem; margin-top: 0.4rem; text-align: center; opacity: 0.7;
}