/* Tomorrow Life Commission Calculator - Styles */

:root {
    --primary: #1e3a5f;
    --primary-dark: #152a45;
    --primary-light: #2d5a8a;
    --accent: #0d7377;
    --accent-light: #14a085;
    --success: #059669;
    --warning: #d97706;
    --error: #dc2626;
    --gray-50: #f9fafb;
    --gray-100: #f3f4f6;
    --gray-200: #e5e7eb;
    --gray-300: #d1d5db;
    --gray-400: #9ca3af;
    --gray-500: #6b7280;
    --gray-600: #4b5563;
    --gray-700: #374151;
    --gray-800: #1f2937;
    --gray-900: #111827;
    --shadow: 0 1px 3px 0 rgba(0,0,0,0.1);
    --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.1);
    --radius: 0.5rem;
    --radius-lg: 1rem;
    --radius-xl: 1.5rem;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    font-size: 0.9375rem;
    line-height: 1.6;
    color: var(--gray-700);
    background: linear-gradient(135deg, #f0f4f8 0%, #e8eef5 100%);
    min-height: 100vh;
}

/* Header */
.app-header {
    background: var(--primary);
    color: white;
    padding: 1rem 2rem;
    box-shadow: var(--shadow-lg);
    position: sticky;
    top: 0;
    z-index: 100;
}

.header-content {
    max-width: 1400px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.brand {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.brand-icon {
    width: 40px;
    height: 40px;
    background: linear-gradient(135deg, var(--accent) 0%, var(--accent-light) 100%);
    border-radius: var(--radius);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
}

.brand-text h1 {
    color: white;
    font-size: 1.25rem;
    font-weight: 600;
}

.brand-text p {
    color: rgba(255,255,255,0.7);
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

.user-nav {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.user-email {
    color: rgba(255,255,255,0.9);
    font-size: 0.875rem;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.75rem 1.25rem;
    font-size: 0.9375rem;
    font-weight: 500;
    border-radius: var(--radius);
    border: none;
    cursor: pointer;
    transition: all 0.2s;
    text-decoration: none;
}

.btn:disabled { opacity: 0.5; cursor: not-allowed; }

.btn-primary {
    background: var(--primary);
    color: white;
}

.btn-primary:hover:not(:disabled) {
    background: var(--primary-dark);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.btn-secondary {
    background: white;
    color: var(--gray-700);
    border: 1px solid var(--gray-300);
}

.btn-secondary:hover:not(:disabled) {
    background: var(--gray-50);
}

.btn-danger {
    background: var(--error);
    color: white;
}

.btn-sm { padding: 0.5rem 1rem; font-size: 0.875rem; }

/* Cards */
.card {
    background: white;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow);
    border: 1px solid var(--gray-200);
}

.card-header {
    padding: 1.25rem 1.5rem;
    border-bottom: 1px solid var(--gray-200);
}

.card-header h2 {
    font-size: 1.125rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.card-body { padding: 1.5rem; }

/* Forms */
.form-group { margin-bottom: 1.25rem; }

.form-group label {
    display: block;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--gray-700);
    margin-bottom: 0.5rem;
}

.required { color: var(--error); margin-left: 0.25rem; }

.form-control {
    width: 100%;
    padding: 0.75rem 1rem;
    font-size: 0.9375rem;
    border: 1.5px solid var(--gray-300);
    border-radius: var(--radius);
    background: white;
    color: var(--gray-900);
    transition: all 0.2s;
}

.form-control:focus {
    outline: none;
    border-color: var(--primary-light);
    box-shadow: 0 0 0 3px rgba(30, 58, 95, 0.1);
}

.form-control:disabled {
    background: var(--gray-100);
    color: var(--gray-500);
    cursor: not-allowed;
}

.helper-text {
    color: var(--gray-500);
    font-size: 0.875rem;
    margin-top: 0.5rem;
}

.age-preview {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    background: #ecfdf5;
    color: var(--success);
    padding: 0.5rem 0.75rem;
    border-radius: var(--radius);
    font-size: 0.875rem;
    font-weight: 500;
    margin-top: 0.5rem;
}

/* KPI Cards */
.kpi-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1.25rem;
    margin-bottom: 1.5rem;
}

.kpi-card {
    background: white;
    padding: 1.5rem;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow);
    border: 1px solid var(--gray-200);
    transition: transform 0.2s, box-shadow 0.2s;
}

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

.kpi-card.primary {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
    color: white;
    border: none;
}

.kpi-card.primary .kpi-label { color: rgba(255,255,255,0.8); }
.kpi-card.primary .kpi-value { color: white; }

.kpi-card.warning {
    background: linear-gradient(135deg, #f59e0b 0%, #d97706 100%);
    color: white;
    border: none;
}

.kpi-label {
    font-size: 0.875rem;
    color: var(--gray-500);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 0.5rem;
}

.kpi-value {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--gray-900);
}

.kpi-sublabel {
    font-size: 0.875rem;
    color: var(--gray-500);
    margin-top: 0.5rem;
}

/* Calculation Table */
.calc-table {
    width: 100%;
    border-collapse: collapse;
}

.calc-table th,
.calc-table td {
    padding: 1rem;
    text-align: left;
    border-bottom: 1px solid var(--gray-200);
}

.calc-table th {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--gray-500);
    font-weight: 600;
    background: var(--gray-50);
}

.calc-table td {
    font-size: 0.9375rem;
    color: var(--gray-700);
}

.calc-table tr:last-child td { border-bottom: none; }

.calc-table tr.highlight-row {
    background: #ecfdf5;
}

.calc-table tr.highlight-row td {
    color: var(--success);
    font-weight: 600;
}

.formula {
    font-family: monospace;
    font-size: 0.8125rem;
    color: var(--gray-500);
    background: var(--gray-100);
    padding: 0.25rem 0.5rem;
    border-radius: 0.25rem;
}

/* Alert Messages */
.alert {
    padding: 1rem 1.25rem;
    border-radius: var(--radius);
    margin-bottom: 1.5rem;
    display: none;
    align-items: center;
    gap: 0.75rem;
}

.alert.show { display: flex; }

.alert-error {
    background: #fef2f2;
    color: var(--error);
    border: 1px solid #fecaca;
}

.alert-success {
    background: #ecfdf5;
    color: var(--success);
    border: 1px solid #a7f3d0;
}

/* Login Page */
.login-container {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 1.5rem;
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
}

.login-card {
    background: white;
    padding: 2.5rem;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-lg);
    width: 100%;
    max-width: 420px;
}

.login-header {
    text-align: center;
    margin-bottom: 2rem;
}

.login-header .brand-icon {
    margin: 0 auto 1rem;
    width: 64px;
    height: 64px;
    font-size: 2rem;
}

.login-header h1 {
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
}

.login-header p { color: var(--gray-500); }

/* Main Layout */
.main-content {
    flex: 1;
    padding: 2rem;
}

.content-grid {
    max-width: 1400px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 360px 1fr;
    gap: 2rem;
}

/* Loading State */
.btn-loading {
    position: relative;
    color: transparent !important;
}

.btn-loading::after {
    content: '';
    position: absolute;
    width: 20px;
    height: 20px;
    border: 2px solid rgba(255,255,255,0.3);
    border-top-color: white;
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

@keyframes spin { to { transform: rotate(360deg); } }

/* Empty State */
.empty-state {
    text-align: center;
    padding: 4rem 2rem;
    color: var(--gray-500);
}

.empty-state-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
    opacity: 0.5;
}

/* Audit Section */
.audit-section {
    background: var(--gray-50);
    padding: 1.5rem;
    border-radius: var(--radius-lg);
    margin-top: 1.5rem;
}

.audit-section h3 {
    font-size: 1rem;
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.audit-section code {
    font-family: monospace;
    font-size: 0.8125rem;
    background: white;
    padding: 0.25rem 0.5rem;
    border-radius: 0.25rem;
    border: 1px solid var(--gray-200);
}

/* Responsive */
@media (max-width: 1024px) {
    .content-grid { grid-template-columns: 1fr; }
    .header-content {
        flex-direction: column;
        gap: 1rem;
        text-align: center;
    }
}

@media (max-width: 640px) {
    .main-content { padding: 1rem; }
    .login-card { padding: 1.5rem; }
    .kpi-grid { grid-template-columns: 1fr; }
}