/* Idleman Flight Adviser — Modern Sky Theme */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&display=swap');

:root {
    --bg: #f0f4ff;
    --bg-soft: #f8faff;
    --card-bg: #ffffff;
    --card-border: #e2e8f0;
    --text: #1e293b;
    --text-muted: #64748b;
    --text-soft: #94a3b8;
    --primary: #2563eb;
    --primary-hover: #1d4ed8;
    --primary-light: #eff6ff;
    --accent: #06b6d4;
    --accent-light: #ecfeff;
    --warning: #f59e0b;
    --warning-light: #fffbeb;
    --danger: #ef4444;
    --danger-light: #fef2f2;
    --success: #10b981;
    --success-light: #ecfdf5;
    --radius: 16px;
    --radius-sm: 10px;
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.04), 0 1px 2px rgba(0,0,0,0.06);
    --shadow: 0 4px 24px rgba(0,0,0,0.06), 0 1px 4px rgba(0,0,0,0.04);
    --shadow-lg: 0 12px 48px rgba(0,0,0,0.08), 0 4px 12px rgba(0,0,0,0.04);
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, system-ui, sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.7;
    min-height: 100vh;
    -webkit-font-smoothing: antialiased;
}

/* ── Header ── */
header {
    background: rgba(255,255,255,0.72);
    backdrop-filter: blur(18px) saturate(180%);
    -webkit-backdrop-filter: blur(18px) saturate(180%);
    border-bottom: 1px solid var(--card-border);
    position: sticky;
    top: 0;
    z-index: 100;
}

nav {
    max-width: 1200px;
    margin: 0 auto;
    padding: 14px 28px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
}

.logo-icon {
    width: 38px;
    height: 38px;
    background: linear-gradient(135deg, var(--primary), var(--accent));
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.3rem;
    color: #fff;
    box-shadow: 0 2px 8px rgba(37,99,235,0.3);
}

.logo h1 {
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--text);
    letter-spacing: -0.3px;
}

.badge {
    background: linear-gradient(135deg, var(--primary), var(--accent));
    color: #fff;
    padding: 4px 14px;
    border-radius: 20px;
    font-size: 0.7rem;
    font-weight: 600;
    letter-spacing: 0.6px;
    text-transform: uppercase;
}

/* ── Main ── */
main {
    max-width: 1100px;
    margin: 0 auto;
    padding: 40px 24px 80px;
}

.card {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: var(--radius);
    padding: 36px;
    margin-bottom: 24px;
    box-shadow: var(--shadow-sm);
    transition: box-shadow 0.3s ease, transform 0.2s ease;
}

.card:hover {
    box-shadow: var(--shadow);
}

h2 {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 6px;
    letter-spacing: -0.3px;
}

.subtitle {
    color: var(--text-muted);
    font-size: 0.9rem;
    margin-bottom: 28px;
}

/* ── Upload Zone ── */
.upload-zone {
    border: 2px dashed var(--card-border);
    border-radius: var(--radius);
    padding: 56px 32px;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    background: var(--bg-soft);
}

.upload-zone:hover, .upload-zone.dragover {
    border-color: var(--primary);
    background: var(--primary-light);
    transform: translateY(-2px);
    box-shadow: var(--shadow);
}

.upload-icon {
    font-size: 3rem;
    margin-bottom: 16px;
    display: inline-block;
    animation: float 3s ease-in-out infinite;
}

@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-8px); }
}

.upload-zone p {
    color: var(--text);
    font-weight: 500;
}

.upload-hint {
    font-size: 0.82rem;
    color: var(--text-muted);
    margin-top: 8px;
}

/* ── Progress Bar ── */
.upload-progress {
    text-align: center;
    padding: 32px;
}

.progress-bar {
    width: 100%;
    max-width: 400px;
    height: 6px;
    background: var(--card-border);
    border-radius: 10px;
    margin: 20px auto;
    overflow: hidden;
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--primary), var(--accent));
    border-radius: 10px;
    animation: progressPulse 1.5s ease-in-out infinite;
}

@keyframes progressPulse {
    0%, 100% { width: 30%; }
    50% { width: 80%; }
}

.hidden { display: none !important; }

/* ── Summary Grid ── */
.summary-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
    gap: 16px;
    margin-top: 20px;
}

.summary-item {
    background: var(--bg-soft);
    padding: 20px;
    border-radius: var(--radius-sm);
    text-align: center;
    transition: transform 0.2s ease;
}

.summary-item:hover { transform: translateY(-2px); }

.summary-item .value {
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: 4px;
}

.summary-item .label {
    font-size: 0.78rem;
    color: var(--text-muted);
    font-weight: 500;
}

/* ── Metrics Grid ── */
.metrics-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 14px;
    margin-top: 20px;
}

.metric-card {
    background: var(--bg-soft);
    padding: 18px;
    border-radius: var(--radius-sm);
    border-left: 4px solid var(--card-border);
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.metric-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-sm);
}

.metric-card.excellent { border-left-color: var(--success); background: var(--success-light); }
.metric-card.good { border-left-color: var(--primary); background: var(--primary-light); }
.metric-card.fair { border-left-color: var(--warning); background: var(--warning-light); }
.metric-card.poor { border-left-color: var(--danger); background: var(--danger-light); }

.metric-card .metric-name {
    font-size: 0.8rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    font-weight: 600;
    margin-bottom: 4px;
}

.metric-card .metric-value {
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--text);
}

.metric-card .metric-label {
    font-size: 0.72rem;
    margin-top: 6px;
    padding: 3px 10px;
    border-radius: 12px;
    display: inline-block;
    font-weight: 600;
}

.metric-card.excellent .metric-label { background: var(--success); color: #fff; }
.metric-card.good .metric-label { background: var(--primary); color: #fff; }
.metric-card.fair .metric-label { background: var(--warning); color: #fff; }
.metric-card.poor .metric-label { background: var(--danger); color: #fff; }

/* ── Suggestions ── */
.section-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 20px;
    flex-wrap: wrap;
    gap: 12px;
}

.btn-secondary {
    background: var(--card-bg);
    border: 1.5px solid var(--card-border);
    color: var(--text);
    padding: 10px 20px;
    border-radius: 10px;
    cursor: pointer;
    font-size: 0.85rem;
    font-weight: 600;
    transition: all 0.2s ease;
    letter-spacing: -0.2px;
}

.btn-secondary:hover {
    border-color: var(--primary);
    color: var(--primary);
    background: var(--primary-light);
    transform: translateY(-1px);
}

.suggestion-card {
    background: var(--bg-soft);
    border: 1px solid var(--card-border);
    border-radius: var(--radius-sm);
    padding: 22px;
    margin-bottom: 14px;
    transition: all 0.3s ease;
}

.suggestion-card:hover {
    border-color: var(--primary);
    box-shadow: var(--shadow);
    transform: translateX(2px);
}

.suggestion-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 14px;
    flex-wrap: wrap;
    gap: 8px;
}

.suggestion-param {
    font-size: 1.05rem;
    font-weight: 700;
    color: var(--primary);
    font-family: 'Fira Code', 'Cascadia Code', 'Consolas', monospace;
}

.suggestion-priority {
    padding: 4px 12px;
    border-radius: 14px;
    font-size: 0.7rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.4px;
}

.priority-critical { background: var(--danger-light); color: var(--danger); }
.priority-high { background: var(--warning-light); color: #d97706; }
.priority-medium { background: var(--primary-light); color: var(--primary); }
.priority-low { background: #f1f5f9; color: var(--text-muted); }

.suggestion-values {
    display: flex;
    align-items: center;
    gap: 14px;
    margin-bottom: 14px;
    font-size: 0.9rem;
}

.value-old {
    color: var(--danger);
    text-decoration: line-through;
    font-weight: 600;
    font-family: 'Fira Code', monospace;
    background: var(--danger-light);
    padding: 3px 10px;
    border-radius: 6px;
}

.value-arrow { color: var(--text-muted); font-size: 1.1rem; }

.value-new {
    color: var(--success);
    font-weight: 700;
    font-family: 'Fira Code', monospace;
    background: var(--success-light);
    padding: 3px 10px;
    border-radius: 6px;
}

.suggestion-reason {
    color: var(--text-muted);
    font-size: 0.88rem;
    margin-bottom: 12px;
    padding: 14px;
    background: var(--card-bg);
    border-radius: 8px;
    line-height: 1.6;
    border: 1px solid var(--card-border);
}

.suggestion-cli {
    background: #0f172a;
    padding: 10px 16px;
    border-radius: 8px;
    font-family: 'Fira Code', 'Cascadia Code', 'Consolas', monospace;
    font-size: 0.82rem;
    color: #a5f0d0;
    display: inline-block;
    cursor: pointer;
    transition: all 0.2s ease;
    border: 1px solid #1e293b;
}

.suggestion-cli:hover {
    background: #1e293b;
    transform: scale(1.02);
}

.suggestion-cli:active {
    transform: scale(0.97);
}

.suggestion-category {
    display: inline-block;
    padding: 2px 10px;
    border-radius: 8px;
    font-size: 0.68rem;
    text-transform: uppercase;
    letter-spacing: 0.6px;
    font-weight: 700;
    background: #f1f5f9;
    color: var(--text-muted);
    border: 1px solid var(--card-border);
}

/* ── Error ── */
.error-card {
    border-color: var(--danger);
    background: var(--danger-light);
}

/* ── Toast ── */
.toast {
    position: fixed;
    top: 24px;
    right: 24px;
    background: #0f172a;
    color: #e2e8f0;
    padding: 14px 24px;
    border-radius: 12px;
    font-size: 0.85rem;
    font-weight: 500;
    z-index: 1000;
    box-shadow: var(--shadow-lg);
    animation: slideInRight 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

@keyframes slideInRight {
    from { transform: translateX(120%); opacity: 0; }
    to { transform: translateX(0); opacity: 1; }
}

/* ── Animations ── */
@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(16px); }
    to { opacity: 1; transform: translateY(0); }
}

.animate-in {
    animation: fadeInUp 0.5s cubic-bezier(0.16, 1, 0.3, 1) both;
}

/* ── Footer ── */
footer {
    text-align: center;
    padding: 28px;
    color: var(--text-muted);
    font-size: 0.8rem;
    border-top: 1px solid var(--card-border);
    background: var(--card-bg);
}

/* ── Charts ── */
.chart-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 20px;
    margin-top: 16px;
}

.chart-card {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: var(--radius-sm);
    padding: 20px;
    box-shadow: var(--shadow-sm);
    transition: box-shadow 0.3s ease;
}

.chart-card:hover {
    box-shadow: var(--shadow);
}

.chart-card h3 {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 14px;
}

.chart-card canvas {
    max-height: 280px;
}

.chart-full {
    grid-column: 1 / -1;
}

.chart-full canvas {
    max-height: 240px;
}

/* ── Responsive ── */
@media (max-width: 768px) {
    nav { padding: 12px 16px; }
    .logo h1 { font-size: 1rem; }
    main { padding: 20px 12px 60px; }
    .card { padding: 22px; }
    .upload-zone { padding: 32px 16px; }
    .summary-grid { grid-template-columns: repeat(2, 1fr); }
    .metrics-grid { grid-template-columns: repeat(2, 1fr); }
    .suggestion-header { flex-direction: column; align-items: flex-start; }
    .chart-grid { grid-template-columns: 1fr; }
}