/* 🚗 Business Travel Logbook Generator Styling */
/* Refined, professional off-white/light theme, typography, and strict 8px grid alignment (Rule of 8) */

:root {
    /* Color Palette: Professional Light Slate & Warm Off-White */
    --bg-primary: #f8fafc;         /* Elegant cool off-white (Slate 50) */
    --bg-secondary: #f1f5f9;       /* Light gray-slate (Slate 100) */
    --card-bg: #ffffff;            /* Pure white cards */
    --card-border: #e2e8f0;        /* Soft gray border (Slate 200) */
    
    /* Muted Steel Blue/Slate accents */
    --accent: #334155;             /* Deep slate (Slate 700) */
    --accent-hover: #1e293b;       /* Darker slate (Slate 800) */
    --accent-glow: rgba(51, 65, 85, 0.1);
    
    /* Text colors */
    --text-primary: #0f172a;       /* Dark slate for high readability (Slate 900) */
    --text-secondary: #475569;     /* Medium slate (Slate 600) */
    --text-muted: #64748b;         /* Muted gray-slate (Slate 500) */
    
    /* Feedback */
    --danger: #b91c1c;             /* Muted red */
    --danger-hover: #991b1b;       /* Darker red */
    --success: #15803d;            /* Muted green */
}

/* Base reset aligning to 8px increments */
* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    min-height: 100vh;
    padding: 3rem 2rem;            /* 48px / 32px (Multiples of 8) */
    position: relative;
    overflow-x: hidden;
    line-height: 1.5;
}

.background-glow {
    position: fixed;
    top: -20%;
    left: 20%;
    width: 640px;                  /* 80 * 8 */
    height: 640px;                 /* 80 * 8 */
    background: radial-gradient(circle, rgba(51, 65, 85, 0.03) 0%, transparent 70%);
    z-index: 0;
    pointer-events: none;
    filter: blur(80px);
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    position: relative;
    z-index: 1;
}

/* Header Grid & Spacing (Multiples of 8) */
.app-header {
    text-align: center;
    margin-bottom: 3rem;           /* 48px */
}

.badge {
    display: inline-block;
    padding: 0.25rem 0.75rem;       /* 4px / 12px */
    background: rgba(51, 65, 85, 0.05);
    border: 1px solid rgba(51, 65, 85, 0.15);
    border-radius: 9999px;         /* Standard rounded pill */
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 0.05em;
    color: var(--text-secondary);
    margin-bottom: 1rem;           /* 16px */
}

h1 {
    font-family: 'Outfit', 'Inter', sans-serif;
    font-size: 2.5rem;             /* 40px */
    font-weight: 700;
    margin-bottom: 0.5rem;         /* 8px */
    letter-spacing: -0.02em;
    color: var(--text-primary);
}

.gradient-text {
    color: var(--accent);          /* Elegant light steel */
}

.subtitle {
    color: var(--text-secondary);
    font-size: 1rem;               /* 16px */
    max-width: 640px;              /* 80 * 8 */
    margin: 0 auto;
    line-height: 1.6;
}

/* Grid layout with Rule of 8 */
.main-grid {
    display: grid;
    grid-template-columns: 1fr 1.25fr;
    gap: 2rem;                     /* 32px */
    margin-bottom: 2rem;           /* 32px */
}

@media (max-width: 900px) {
    .main-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;               /* 24px */
    }
}

.card {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: 16px;           /* 16px */
    padding: 2rem;                 /* 32px */
    box-shadow: 0 4px 12px rgba(15, 23, 42, 0.04), 0 1px 2px rgba(15, 23, 42, 0.02);
}

.card h2 {
    font-family: 'Outfit', 'Inter', sans-serif;
    font-size: 1.25rem;            /* 20px */
    font-weight: 600;
    margin-bottom: 1.5rem;         /* 24px */
    display: flex;
    align-items: center;
    gap: 0.5rem;                   /* 8px */
    color: var(--text-primary);
}

/* Form layouts following 8px grid spacing */
.form-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;                     /* 16px */
}

.form-group.full-width {
    grid-column: span 2;
}

.form-group label {
    display: block;
    font-size: 0.875rem;           /* 14px */
    font-weight: 500;
    color: var(--text-secondary);
    margin-bottom: 0.5rem;         /* 8px */
}

.form-group input {
    width: 100%;
    padding: 0.5rem 1rem;          /* 8px / 16px */
    background: #ffffff;
    border: 1px solid #cbd5e1;     /* Slate 300 border */
    border-radius: 8px;            /* 8px */
    color: var(--text-primary);
    font-size: 0.9375rem;          /* ~15px */
    transition: all 0.2s;
}

.form-group input:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 3px var(--accent-glow);
}

/* Switch & toggle controls */
.toggle-group {
    margin-top: 2rem;              /* 32px */
    padding-top: 1.5rem;           /* 24px */
    border-top: 1px solid var(--card-border);
    display: flex;
    align-items: center;
    gap: 1rem;                     /* 16px */
}

.switch {
    position: relative;
    display: inline-block;
    width: 48px;                   /* 6 * 8 */
    height: 24px;                  /* 3 * 8 */
    flex-shrink: 0;
}

.switch input {
    opacity: 0;
    width: 0;
    height: 0;
}

.slider {
    position: absolute;
    cursor: pointer;
    top: 0; left: 0; right: 0; bottom: 0;
    background-color: #cbd5e1;     /* Slate 300 */
    transition: .25s;
}

.slider:before {
    position: absolute;
    content: "";
    height: 16px;                  /* 2 * 8 */
    width: 16px;                   /* 2 * 8 */
    left: 4px;
    bottom: 4px;
    background-color: #ffffff;
    transition: .25s;
}

input:checked + .slider {
    background-color: var(--accent);
}

input:checked + .slider:before {
    transform: translateX(24px);   /* 3 * 8 */
}

.slider.round {
    border-radius: 24px;
}
.slider.round:before {
    border-radius: 50%;
}

.toggle-label strong {
    display: block;
    font-size: 0.9375rem;
    font-weight: 500;
}

.toggle-label span {
    display: block;
    font-size: 0.75rem;            /* 12px */
    color: var(--text-secondary);
    margin-top: 0.25rem;           /* 4px */
}

/* Client Table Area with 8px alignment */
.card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;         /* 24px */
}

.card-header h2 {
    margin-bottom: 0;
}

.table-wrapper {
    overflow-y: auto;
    max-height: 400px;             /* 50 * 8 */
    border: 1px solid var(--card-border);
    border-radius: 8px;            /* 8px */
}

table {
    width: 100%;
    border-collapse: collapse;
}

th {
    text-align: left;
    padding: 0.75rem 1rem;         /* 12px / 16px */
    font-size: 0.75rem;            /* 12px */
    font-weight: 600;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    border-bottom: 1px solid var(--card-border);
    background: var(--bg-secondary);
}

td {
    padding: 0.75rem 1rem;         /* 12px / 16px */
    border-bottom: 1px solid var(--card-border);
    vertical-align: middle;
}

td input, td select {
    width: 100%;
    padding: 0.5rem 0.75rem;       /* 8px / 12px */
    background: #ffffff;
    border: 1px solid #cbd5e1;
    border-radius: 6px;
    color: var(--text-primary);
    font-size: 0.875rem;           /* 14px */
    transition: border-color 0.2s;
}

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

td select {
    cursor: pointer;
}

.text-center {
    text-align: center;
}

/* Button & Action styling conforming to spacing standard */
.btn {
    padding: 0.5rem 1.5rem;        /* 8px / 24px */
    border-radius: 8px;            /* 8px */
    font-weight: 600;
    font-size: 0.875rem;           /* 14px */
    cursor: pointer;
    border: none;
    transition: all 0.2s;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;                   /* 8px */
}

.btn-secondary {
    background: #ffffff;
    color: var(--text-primary);
    border: 1px solid #cbd5e1;
}

.btn-secondary:hover {
    background: var(--bg-secondary);
    border-color: #94a3b8;
}

.btn-danger {
    background: transparent;
    color: var(--text-secondary);
    padding: 0.25rem 0.5rem;       /* 4px / 8px */
    font-size: 0.875rem;
}

.btn-danger:hover {
    background: rgba(185, 28, 28, 0.08);
    color: var(--danger);
    border-radius: 6px;
}

/* Footer Section conforming to multiple of 8px */
.action-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: 16px;
    padding: 1.5rem 2rem;          /* 24px / 32px */
    box-shadow: 0 4px 12px rgba(15, 23, 42, 0.04);
}

@media (max-width: 768px) {
    .action-footer {
        flex-direction: column;
        gap: 1.5rem;               /* 24px */
        text-align: center;
    }
}

.summary-live {
    display: flex;
    gap: 2rem;                     /* 32px */
}

.summary-live .stat {
    font-size: 0.875rem;           /* 14px */
    color: var(--text-secondary);
}

.summary-live strong {
    color: var(--text-primary);
    font-weight: 600;
}

.btn-primary {
    background: var(--accent);
    color: white;
    font-size: 0.9375rem;
    padding: 0.75rem 2rem;         /* 12px / 32px */
    border-radius: 8px;            /* 8px */
}

.btn-primary:hover {
    background: var(--accent-hover);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(51, 65, 85, 0.2);
}