/* ============================================
   WaterBudget - App Stylesheet
   Lightweight, no-framework CSS for the dashboard
   ============================================ */

/* --- CSS Custom Properties --- */
:root {
    --color-primary: #2563EB;
    --color-primary-dark: #1D4ED8;
    --color-primary-light: #DBEAFE;
    --color-success: #16A34A;
    --color-success-light: #DCFCE7;
    --color-warning: #D97706;
    --color-warning-light: #FEF3C7;
    --color-danger: #DC2626;
    --color-danger-light: #FEE2E2;
    --color-gray-50: #F8FAFC;
    --color-gray-100: #F1F5F9;
    --color-gray-200: #E2E8F0;
    --color-gray-300: #CBD5E1;
    --color-gray-400: #94A3B8;
    --color-gray-500: #64748B;
    --color-gray-600: #475569;
    --color-gray-700: #334155;
    --color-gray-800: #1E293B;
    --color-gray-900: #0F172A;
    --sidebar-width: 260px;
    --topbar-height: 60px;
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 14px;
    --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
    --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.1);
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-mono: 'SFMono-Regular', 'Fira Code', monospace;
}

/* --- Reset --- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { font-size: 16px; -webkit-font-smoothing: antialiased; overflow-x: hidden; }
body { font-family: var(--font-sans); color: var(--color-gray-800); background: var(--color-gray-50); line-height: 1.5; overflow-x: hidden; }
a { color: var(--color-primary); text-decoration: none; }
a:hover { text-decoration: underline; }
img, svg { display: block; max-width: 100%; }

/* --- Typography --- */
h1, h2, h3, h4 { font-weight: 600; color: var(--color-gray-900); line-height: 1.3; }
h1 { font-size: 1.75rem; }
h2 { font-size: 1.5rem; }
h3 { font-size: 1.125rem; }
h4 { font-size: 1rem; }

/* --- Buttons --- */
.btn {
    display: inline-flex; align-items: center; gap: 0.375rem;
    padding: 0.5rem 1rem; border-radius: var(--radius-sm);
    font-size: 0.875rem; font-weight: 500; cursor: pointer;
    border: 1px solid transparent; transition: all 0.15s ease;
    text-decoration: none; white-space: nowrap;
}
.btn:hover { text-decoration: none; }
.btn-primary { background: var(--color-primary); color: #fff; border-color: var(--color-primary); }
.btn-primary:hover { background: var(--color-primary-dark); }
.btn-outline { background: #fff; color: var(--color-gray-700); border-color: var(--color-gray-300); }
.btn-outline:hover { background: var(--color-gray-50); border-color: var(--color-gray-400); }
.btn-ghost { background: transparent; color: var(--color-gray-600); }
.btn-ghost:hover { background: var(--color-gray-100); color: var(--color-gray-800); }
.btn-danger { background: var(--color-danger); color: #fff; }
.btn-danger:hover { background: #B91C1C; }
.btn-sm { padding: 0.375rem 0.75rem; font-size: 0.8125rem; }
.btn-lg { padding: 0.75rem 1.5rem; font-size: 1rem; }
.btn-block { width: 100%; justify-content: center; }
.btn:disabled { opacity: 0.5; cursor: not-allowed; }

/* --- Forms --- */
.form-group { margin-bottom: 1rem; }
.form-group label { display: block; font-size: 0.8125rem; font-weight: 500; color: var(--color-gray-700); margin-bottom: 0.25rem; }
.input-full, .select-full {
    width: 100%; padding: 0.5rem 0.75rem; border: 1px solid var(--color-gray-300);
    border-radius: var(--radius-sm); font-size: 0.875rem; font-family: var(--font-sans);
    background: #fff; color: var(--color-gray-800); transition: border-color 0.15s;
}
.input-full:focus, .select-full:focus { outline: none; border-color: var(--color-primary); box-shadow: 0 0 0 3px var(--color-primary-light); }
.select-sm { padding: 0.25rem 0.5rem; font-size: 0.8125rem; border: 1px solid var(--color-gray-300); border-radius: var(--radius-sm); background: #fff; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }
.form-hint { font-size: 0.75rem; color: var(--color-gray-500); margin-top: 0.375rem; }
.manual-coords { margin-top: 0.25rem; margin-bottom: 1rem; }
.manual-coords summary { font-size: 0.8125rem; color: var(--color-primary); cursor: pointer; font-weight: 500; user-select: none; }
.manual-coords summary:hover { text-decoration: underline; }
.form-error { color: var(--color-danger); font-size: 0.8125rem; margin-top: 0.5rem; padding: 0.5rem; background: var(--color-danger-light); border-radius: var(--radius-sm); }

/* --- App Layout --- */
.app-page { display: flex; min-height: 100vh; }

/* --- Sidebar --- */
.sidebar {
    width: var(--sidebar-width); background: #fff; border-right: 1px solid var(--color-gray-200);
    display: flex; flex-direction: column; position: fixed; top: 0; left: 0; bottom: 0;
    z-index: 100; transition: transform 0.2s ease;
}
.sidebar-header { display: flex; align-items: center; justify-content: space-between; padding: 1rem 1.25rem; border-bottom: 1px solid var(--color-gray-100); }
.sidebar-logo { display: flex; align-items: center; gap: 0.5rem; font-weight: 600; font-size: 1.125rem; color: var(--color-gray-900); text-decoration: none; }
.sidebar-logo:hover { text-decoration: none; }
.sidebar-toggle { background: none; border: none; cursor: pointer; color: var(--color-gray-400); padding: 0.25rem; flex-shrink: 0; }
.sidebar-toggle svg { flex-shrink: 0; }
.sidebar-toggle:hover { color: var(--color-gray-600); }

.sidebar-nav { flex: 1; padding: 0.75rem; overflow-y: auto; }
.nav-item {
    display: flex; align-items: center; gap: 0.75rem; padding: 0.625rem 0.75rem;
    border-radius: var(--radius-sm); color: var(--color-gray-600); font-size: 0.875rem;
    font-weight: 500; transition: all 0.15s; text-decoration: none; margin-bottom: 0.125rem;
}
.nav-item:hover { background: var(--color-gray-100); color: var(--color-gray-800); text-decoration: none; }
.nav-item.active { background: var(--color-primary-light); color: var(--color-primary); }

.sidebar-footer { padding: 0.75rem 1rem; border-top: 1px solid var(--color-gray-100); }
.sidebar-user { display: flex; align-items: center; gap: 0.75rem; margin-bottom: 0.5rem; }
.sidebar-user-avatar {
    width: 36px; height: 36px; border-radius: 50%; background: var(--color-primary-light);
    color: var(--color-primary); display: flex; align-items: center; justify-content: center;
    font-weight: 600; font-size: 0.875rem; flex-shrink: 0;
}
.sidebar-user-info { flex: 1; min-width: 0; }
.sidebar-user-name { display: block; font-size: 0.8125rem; font-weight: 500; color: var(--color-gray-800); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.sidebar-user-email { display: block; font-size: 0.6875rem; color: var(--color-gray-500); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }

/* --- Main Content --- */
.main-content { flex: 1; margin-left: var(--sidebar-width); min-height: 100vh; }

.topbar {
    height: var(--topbar-height); background: #fff; border-bottom: 1px solid var(--color-gray-200);
    display: flex; align-items: center; padding: 0 1.5rem; gap: 1rem;
    position: sticky; top: 0; z-index: 50;
}
.topbar-title { font-size: 1.125rem; font-weight: 600; color: var(--color-gray-900); flex: 1; }
.topbar-actions { display: flex; gap: 0.5rem; align-items: center; }
.sidebar-mobile-toggle {
    display: none;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    flex-shrink: 0;
    background: none;
    border: none;
    cursor: pointer;
    color: var(--color-gray-600);
}
.sidebar-mobile-toggle svg { flex-shrink: 0; }
.sidebar-backdrop { display: none; }

/* --- Views --- */
.view { display: none; padding: 1.5rem; }
.view.active { display: block; }
.view-header { display: flex; align-items: center; justify-content: space-between; margin-bottom: 1.5rem; }

/* --- Stats Grid --- */
.stats-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 1rem; margin-bottom: 1.5rem; }
.stat-card { background: #fff; border: 1px solid var(--color-gray-200); border-radius: var(--radius-md); padding: 1.25rem; display: flex; align-items: center; gap: 1rem; }
.stat-icon { width: 44px; height: 44px; border-radius: var(--radius-sm); display: flex; align-items: center; justify-content: center; flex-shrink: 0; }
.stat-icon-blue { background: var(--color-primary-light); color: var(--color-primary); }
.stat-icon-green { background: var(--color-success-light); color: var(--color-success); }
.stat-icon-orange { background: var(--color-warning-light); color: var(--color-warning); }
.stat-icon-purple { background: #F3E8FF; color: #7C3AED; }
.stat-info { flex: 1; }
.stat-value { display: block; font-size: 1.5rem; font-weight: 700; color: var(--color-gray-900); line-height: 1.2; }
.stat-label { display: block; font-size: 0.75rem; color: var(--color-gray-500); font-weight: 500; }

/* --- Cards --- */
.card { background: #fff; border: 1px solid var(--color-gray-200); border-radius: var(--radius-md); overflow: hidden; }
.card-header { display: flex; align-items: center; justify-content: space-between; padding: 1rem 1.25rem; border-bottom: 1px solid var(--color-gray-100); }
.card-header h3 { font-size: 0.9375rem; }
.card-body { padding: 1.25rem; }
.chart-container { position: relative; width: 100%; }
.chart-container canvas { position: absolute; top: 0; left: 0; width: 100% !important; height: 100% !important; }
.card-grid { display: grid; grid-template-columns: 2fr 1fr; gap: 1rem; margin-bottom: 1.5rem; }
.card-lg { grid-column: span 1; }

/* --- Budget Layout --- */
.budget-layout { display: grid; grid-template-columns: 320px 1fr; gap: 1.5rem; }
.budget-config .card { position: sticky; top: calc(var(--topbar-height) + 1.5rem); }

/* --- Farms List --- */
.farms-list { display: grid; gap: 1rem; }
.farm-card {
    background: #fff; border: 1px solid var(--color-gray-200); border-radius: var(--radius-md);
    padding: 1.25rem; transition: box-shadow 0.15s;
}
.farm-card:hover { box-shadow: var(--shadow-md); }
.farm-card-header { display: flex; align-items: center; justify-content: space-between; margin-bottom: 0.75rem; }
.farm-card-title { font-size: 1.0625rem; font-weight: 600; }
.farm-card-location { font-size: 0.8125rem; color: var(--color-gray-500); }
.farm-card-coords { font-size: 0.75rem; color: var(--color-gray-400); font-family: var(--font-mono); }
.farm-card-actions { display: flex; gap: 0.375rem; }
.zone-list { margin-top: 0.75rem; }
.zone-item {
    display: flex; align-items: center; justify-content: space-between;
    padding: 0.5rem 0.75rem; background: var(--color-gray-50); border-radius: var(--radius-sm);
    margin-bottom: 0.375rem; font-size: 0.8125rem;
}
.zone-item-info { display: flex; align-items: center; gap: 0.5rem; }
.zone-item-crop { background: var(--color-primary-light); color: var(--color-primary); padding: 0.125rem 0.5rem; border-radius: 99px; font-size: 0.6875rem; font-weight: 500; }

/* --- Weather Forecast --- */
.weather-forecast { display: grid; gap: 0.5rem; }
.weather-day { display: flex; align-items: center; justify-content: space-between; padding: 0.5rem 0; border-bottom: 1px solid var(--color-gray-100); }
.weather-day:last-child { border-bottom: none; }
.weather-day-date { font-size: 0.8125rem; font-weight: 500; min-width: 80px; }
.weather-day-temps { font-size: 0.8125rem; color: var(--color-gray-600); }
.weather-day-rain { font-size: 0.8125rem; color: var(--color-primary); font-weight: 500; }
.weather-day-eto { font-size: 0.8125rem; color: var(--color-warning); font-weight: 500; }

/* --- Empty State --- */
.empty-state { text-align: center; padding: 3rem 1.5rem; color: var(--color-gray-500); }
.empty-state h3 { color: var(--color-gray-700); margin: 1rem 0 0.5rem; }
.empty-state p { font-size: 0.875rem; margin-bottom: 1.5rem; }

/* --- Modal --- */
.modal-overlay {
    display: none; position: fixed; inset: 0; background: rgba(0,0,0,0.4);
    z-index: 200; align-items: center; justify-content: center; padding: 1rem;
}
.modal-overlay.active { display: flex; }
.modal {
    background: #fff; border-radius: var(--radius-lg); width: 100%; max-width: 520px;
    box-shadow: var(--shadow-lg); max-height: 90vh; overflow-y: auto;
}
.modal-header { display: flex; align-items: center; justify-content: space-between; padding: 1.25rem 1.5rem; border-bottom: 1px solid var(--color-gray-100); }
.modal-header h3 { font-size: 1.0625rem; }
.modal-close { background: none; border: none; font-size: 1.5rem; color: var(--color-gray-400); cursor: pointer; line-height: 1; }
.modal-close:hover { color: var(--color-gray-600); }
.modal-body { padding: 1.5rem; }
.modal-footer { display: flex; justify-content: flex-end; gap: 0.5rem; padding: 1rem 1.5rem; border-top: 1px solid var(--color-gray-100); }

/* --- Auth Page --- */
.auth-page { min-height: 100vh; }
.auth-container { display: grid; grid-template-columns: 1fr 1fr; min-height: 100vh; }
.auth-left { background: linear-gradient(135deg, #1E3A5F 0%, #2563EB 100%); color: #fff; padding: 3rem; display: flex; flex-direction: column; justify-content: center; }
.auth-brand a { display: flex; align-items: center; gap: 0.5rem; color: #fff; text-decoration: none; font-weight: 600; font-size: 1.25rem; margin-bottom: 2rem; }
.auth-left h1 { color: #fff; font-size: 2rem; margin-bottom: 1rem; }
.auth-left p { opacity: 0.85; font-size: 1.0625rem; margin-bottom: 2rem; }
.auth-features { display: grid; gap: 0.75rem; }
.auth-feature { display: flex; align-items: center; gap: 0.5rem; font-size: 0.9375rem; }
.auth-feature svg { flex-shrink: 0; }
.auth-right { display: flex; align-items: center; justify-content: center; padding: 2rem; }
.auth-form-container { width: 100%; max-width: 400px; }
.auth-tabs { display: flex; gap: 0; margin-bottom: 1.5rem; border-bottom: 2px solid var(--color-gray-200); }
.auth-tab {
    flex: 1; padding: 0.75rem; text-align: center; font-weight: 500; font-size: 0.9375rem;
    background: none; border: none; cursor: pointer; color: var(--color-gray-500);
    border-bottom: 2px solid transparent; margin-bottom: -2px; transition: all 0.15s;
}
.auth-tab.active { color: var(--color-primary); border-bottom-color: var(--color-primary); }
.auth-form { display: grid; gap: 0; }
.form-footer { text-align: center; font-size: 0.8125rem; color: var(--color-gray-500); margin-top: 1rem; }

/* --- Report Config --- */
.report-config { max-width: 480px; }
.report-preview-info { margin-top: 1.5rem; padding: 1rem; background: var(--color-primary-light); border-radius: var(--radius-sm); font-size: 0.8125rem; color: var(--color-primary-dark); }

/* --- Budget Table --- */
.budget-table { width: 100%; border-collapse: collapse; font-size: 0.8125rem; }
.budget-table th { text-align: left; padding: 0.5rem 0.75rem; background: var(--color-gray-50); border-bottom: 2px solid var(--color-gray-200); font-weight: 600; color: var(--color-gray-700); white-space: nowrap; }
.budget-table td { padding: 0.5rem 0.75rem; border-bottom: 1px solid var(--color-gray-100); }
.budget-table tr:hover td { background: var(--color-gray-50); }

/* --- Toast --- */
.toast-container { position: fixed; top: 1rem; right: 1rem; z-index: 300; display: flex; flex-direction: column; gap: 0.5rem; }
.toast {
    padding: 0.75rem 1.25rem; border-radius: var(--radius-sm); font-size: 0.875rem;
    color: #fff; box-shadow: var(--shadow-lg); animation: slideIn 0.3s ease;
    max-width: 360px; display: flex; align-items: center; gap: 0.5rem;
}
.toast-success { background: var(--color-success); }
.toast-error { background: var(--color-danger); }
.toast-info { background: var(--color-primary); }
@keyframes slideIn { from { transform: translateX(100%); opacity: 0; } to { transform: translateX(0); opacity: 1; } }

/* --- Text Utilities --- */
.text-muted { color: var(--color-gray-500); font-size: 0.875rem; }
.text-gradient { background: linear-gradient(135deg, #2563EB, #7C3AED); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }

/* --- Responsive --- */
@media (max-width: 1024px) {
    .budget-layout { grid-template-columns: 1fr; }
    .card-grid { grid-template-columns: 1fr; }
}

@media (max-width: 768px) {
    .sidebar { transform: translateX(-100%); }
    .sidebar.open { transform: translateX(0); }
    .main-content { margin-left: 0; }
    .sidebar-mobile-toggle { display: flex; }
    .sidebar-backdrop.open {
        display: block; position: fixed; inset: 0; background: rgba(15, 23, 42, 0.45);
        z-index: 90; animation: fadeIn 0.15s ease;
    }
    @keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }
    .stats-grid { grid-template-columns: repeat(2, 1fr); }
    .auth-container { grid-template-columns: 1fr; }
    .auth-left { display: none; }
    .form-row { grid-template-columns: 1fr; }
}

@media (max-width: 480px) {
    .stats-grid { grid-template-columns: 1fr; }
    .topbar-actions .btn span { display: none; }
}