/**
 * Solarhub Flow - Design System & Global Styles
 * Modern Solar Engineering Palette
 */

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

:root {
    --primary: #0284c7;
    --primary-hover: #0369a1;
    --primary-light: #e0f2fe;
    --secondary: #0f172a;
    --accent: #f59e0b;
    --accent-hover: #d97706;
    --success: #10b981;
    --success-light: #ecfdf5;
    --warning: #f59e0b;
    --warning-light: #fffbeb;
    --danger: #ef4444;
    --danger-light: #fef2f2;
    --purple: #8b5cf6;
    --purple-light: #f5f3ff;
    --teal: #14b8a6;
    --teal-light: #f0fdfa;

    --bg-main: #f8fafc;
    --bg-card: #ffffff;
    --bg-card-hover: #f1f5f9;
    --border-color: #e2e8f0;
    --border-light: #f1f5f9;

    --text-main: #0f172a;
    --text-muted: #64748b;
    --text-light: #94a3b8;

    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
    --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);

    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 16px;
    --radius-full: 9999px;

    --font-main: 'Inter', 'Prompt', -apple-system, BlinkMacSystemFont, sans-serif;
}

/* Reset & Base */
* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: var(--font-main);
    background-color: var(--bg-main);
    color: var(--text-main);
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* App Header & Navbar */
.app-navbar {
    background: #ffffff;
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: var(--shadow-sm);
}

.navbar-container {
    max-width: 1720px;
    margin: 0 auto;
    padding: 0.75rem 1.5rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1.5rem;
}

.brand-wrapper {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    text-decoration: none;
    color: var(--secondary);
}

.brand-icon {
    width: 38px;
    height: 38px;
    background: linear-gradient(135deg, #0284c7 0%, #06b6d4 100%);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    color: #ffffff;
    font-size: 1.2rem;
    box-shadow: 0 4px 10px rgba(2, 132, 199, 0.3);
}

.brand-text h1 {
    font-size: 1.15rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    color: #0f172a;
    display: flex;
    align-items: center;
    gap: 0.4rem;
}

.brand-badge {
    font-size: 0.7rem;
    padding: 0.15rem 0.45rem;
    background: #e0f2fe;
    color: #0284c7;
    border-radius: var(--radius-full);
    font-weight: 600;
}

.brand-text p {
    font-size: 0.75rem;
    color: var(--text-muted);
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    list-style: none;
}

.nav-link {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 0.9rem;
    color: var(--text-muted);
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 500;
    border-radius: var(--radius-sm);
    transition: all 0.2s ease;
}

.nav-link:hover {
    color: var(--primary);
    background: var(--primary-light);
}

.nav-link.active {
    color: var(--primary);
    background: var(--primary-light);
    font-weight: 600;
}

.navbar-actions {
    display: flex;
    align-items: center;
    gap: 1rem;
}

/* Container */
.main-container {
    max-width: 1720px;
    width: 100%;
    margin: 0 auto;
    padding: 1.5rem;
    flex: 1;
}

/* Page Headers */
.page-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 1.5rem;
    flex-wrap: wrap;
    gap: 1rem;
}

.page-title h2 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--secondary);
    display: flex;
    align-items: center;
    gap: 0.6rem;
}

.page-title p {
    font-size: 0.875rem;
    color: var(--text-muted);
    margin-top: 0.2rem;
}

/* KPI Stat Cards */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.stat-card {
    background: #ffffff;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 1.25rem;
    display: flex;
    align-items: center;
    gap: 1rem;
    box-shadow: var(--shadow-sm);
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

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

.stat-icon {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.35rem;
    flex-shrink: 0;
}

.stat-icon.blue { background: #eff6ff; color: #3b82f6; }
.stat-icon.amber { background: #fffbeb; color: #f59e0b; }
.stat-icon.emerald { background: #ecfdf5; color: #10b981; }
.stat-icon.purple { background: #f5f3ff; color: #8b5cf6; }
.stat-icon.cyan { background: #ecfeff; color: #06b6d4; }

.stat-content {
    flex: 1;
}

.stat-label {
    font-size: 0.8rem;
    font-weight: 500;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.03em;
}

.stat-value {
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--secondary);
    line-height: 1.2;
    margin-top: 0.15rem;
}

.stat-sub {
    font-size: 0.75rem;
    color: var(--text-light);
    margin-top: 0.2rem;
}

/* Control Bar & Filters */
.controls-card {
    background: #ffffff;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 1rem;
    margin-bottom: 1.5rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 1rem;
    box-shadow: var(--shadow-sm);
}

.search-box {
    position: relative;
    flex: 1;
    min-width: 260px;
    max-width: 400px;
}

.search-box i {
    position: absolute;
    left: 0.9rem;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-light);
}

.search-input {
    width: 100%;
    padding: 0.55rem 0.9rem 0.55rem 2.4rem;
    font-size: 0.875rem;
    font-family: inherit;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    background: #f8fafc;
    color: var(--text-main);
    transition: border-color 0.2s, background-color 0.2s;
}

.search-input:focus {
    outline: none;
    border-color: var(--primary);
    background: #ffffff;
    box-shadow: 0 0 0 3px rgba(2, 132, 199, 0.15);
}

.filter-group {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    flex-wrap: wrap;
}

.select-filter {
    padding: 0.55rem 0.9rem;
    font-size: 0.875rem;
    font-family: inherit;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    background: #ffffff;
    color: var(--text-main);
    cursor: pointer;
}

.view-toggle {
    display: inline-flex;
    background: #f1f5f9;
    padding: 0.25rem;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border-color);
}

.toggle-btn {
    border: none;
    background: transparent;
    padding: 0.4rem 0.75rem;
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--text-muted);
    border-radius: 4px;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 0.4rem;
    transition: all 0.2s ease;
}

.toggle-btn.active {
    background: #ffffff;
    color: var(--primary);
    font-weight: 600;
    box-shadow: var(--shadow-sm);
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.55rem 1.15rem;
    font-size: 0.875rem;
    font-weight: 600;
    font-family: inherit;
    border-radius: var(--radius-sm);
    border: 1px solid transparent;
    cursor: pointer;
    text-decoration: none;
    transition: all 0.2s ease;
}

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

.btn-primary:hover {
    background: var(--primary-hover);
    box-shadow: 0 4px 12px rgba(2, 132, 199, 0.25);
}

.btn-outline {
    background: #ffffff;
    border-color: var(--border-color);
    color: var(--text-main);
}

.btn-outline:hover {
    background: #f8fafc;
    border-color: #cbd5e1;
}

.btn-sm {
    padding: 0.35rem 0.75rem;
    font-size: 0.8rem;
}

.btn-success {
    background: var(--success);
    color: #ffffff;
}
.btn-success:hover {
    background: #059669;
}

/* Badges */
.badge {
    display: inline-flex;
    align-items: center;
    gap: 0.3rem;
    padding: 0.2rem 0.6rem;
    font-size: 0.75rem;
    font-weight: 600;
    border-radius: var(--radius-full);
}

.badge-blue { background: #eff6ff; color: #2563eb; border: 1px solid #bfdbfe; }
.badge-purple { background: #f5f3ff; color: #7c3aed; border: 1px solid #ddd6fe; }
.badge-cyan { background: #ecfeff; color: #0891b2; border: 1px solid #a5f3fc; }
.badge-indigo { background: #eef2ff; color: #4f46e5; border: 1px solid #c7d2fe; }
.badge-amber { background: #fffbeb; color: #d97706; border: 1px solid #fde68a; }
.badge-orange { background: #fff7ed; color: #ea580c; border: 1px solid #ffedd5; }
.badge-emerald { background: #ecfdf5; color: #059669; border: 1px solid #a7f3d0; }
.badge-green { background: #f0fdf4; color: #16a34a; border: 1px solid #bbf7d0; }
.badge-gray { background: #f1f5f9; color: #475569; border: 1px solid #e2e8f0; }
.badge-red { background: #fef2f2; color: #dc2626; border: 1px solid #fecaca; }

/* Modals */
.modal-backdrop {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(15, 23, 42, 0.6);
    backdrop-filter: blur(4px);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 1.5rem;
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
    transition: all 0.25s ease;
}

.modal-backdrop.show {
    opacity: 1;
    visibility: visible;
}

.modal-card {
    background: #ffffff;
    border-radius: var(--radius-lg);
    width: 100%;
    max-width: 680px;
    max-height: 90vh;
    display: flex;
    flex-direction: column;
    box-shadow: var(--shadow-xl);
    transform: scale(0.95);
    transition: transform 0.25s ease;
}

.modal-backdrop.show .modal-card {
    transform: scale(1);
}

.modal-header {
    padding: 1.25rem 1.5rem;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.modal-header h3 {
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--secondary);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.modal-close {
    background: transparent;
    border: none;
    font-size: 1.25rem;
    color: var(--text-light);
    cursor: pointer;
    padding: 0.25rem;
    line-height: 1;
    transition: color 0.2s;
}

.modal-close:hover {
    color: var(--danger);
}

.modal-body {
    padding: 1.5rem;
    overflow-y: auto;
    flex: 1;
}

.modal-footer {
    padding: 1rem 1.5rem;
    border-top: 1px solid var(--border-color);
    background: #f8fafc;
    border-bottom-left-radius: var(--radius-lg);
    border-bottom-right-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: 0.75rem;
}

/* Forms */
.form-group {
    margin-bottom: 1rem;
}

.form-label {
    display: block;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-main);
    margin-bottom: 0.35rem;
}

.form-control {
    width: 100%;
    padding: 0.6rem 0.9rem;
    font-size: 0.9rem;
    font-family: inherit;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    background: #ffffff;
    color: var(--text-main);
    transition: border-color 0.2s, box-shadow 0.2s;
}

.form-control:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(2, 132, 199, 0.15);
}

.form-grid-2 {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
}

.form-grid-3 {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr;
    gap: 1rem;
}

/* Instant Estimation Card inside modal */
.calc-preview-card {
    background: linear-gradient(135deg, #eff6ff 0%, #ecfeff 100%);
    border: 1px solid #bfdbfe;
    border-radius: var(--radius-md);
    padding: 1rem;
    margin-top: 1rem;
}

.calc-preview-card h4 {
    font-size: 0.875rem;
    font-weight: 700;
    color: #0369a1;
    display: flex;
    align-items: center;
    gap: 0.4rem;
    margin-bottom: 0.5rem;
}

.calc-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 0.75rem;
    text-align: center;
}

.calc-item {
    background: #ffffff;
    padding: 0.6rem;
    border-radius: var(--radius-sm);
    border: 1px solid #e0f2fe;
}

.calc-item .title {
    font-size: 0.7rem;
    color: var(--text-muted);
}

.calc-item .value {
    font-size: 1rem;
    font-weight: 700;
    color: #0284c7;
    margin-top: 0.1rem;
}

/* Toast Notifications */
#toast-container {
    position: fixed;
    bottom: 1.5rem;
    right: 1.5rem;
    z-index: 2000;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.toast {
    background: #0f172a;
    color: #ffffff;
    padding: 0.75rem 1.25rem;
    border-radius: var(--radius-sm);
    font-size: 0.875rem;
    display: flex;
    align-items: center;
    gap: 0.6rem;
    box-shadow: var(--shadow-lg);
    animation: slideIn 0.3s ease forwards;
}

.toast.success { background: #065f46; }
.toast.error { background: #991b1b; }
.toast.info { background: #075985; }

@keyframes slideIn {
    from { transform: translateX(100%); opacity: 0; }
    to { transform: translateX(0); opacity: 1; }
}

/* Responsive */
@media (max-width: 768px) {
    .navbar-container {
        flex-direction: column;
        align-items: stretch;
    }
    .nav-menu {
        overflow-x: auto;
        padding-bottom: 0.25rem;
    }
    .form-grid-2, .form-grid-3 {
        grid-template-columns: 1fr;
    }
    .calc-grid {
        grid-template-columns: 1fr;
    }
}