/* ECOEN - Main Stylesheet */
:root {
    --primary: #1e40af;
    --primary-dark: #1e3a8a;
    --secondary: #3b82f6;
    --success: #10b981;
    --warning: #f59e0b;
    --danger: #ef4444;
    --info: #06b6d4;
    --light: #f8fafc;
    --dark: #1e293b;
    --gray-50: #f8fafc;
    --gray-100: #f1f5f9;
    --gray-200: #e2e8f0;
    --gray-300: #cbd5e1;
    --gray-400: #94a3b8;
    --gray-500: #64748b;
    --gray-600: #475569;
    --gray-700: #334155;
    --gray-800: #1e293b;
    --gray-900: #0f172a;
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
    --shadow: 0 1px 3px rgba(0,0,0,0.1), 0 1px 2px rgba(0,0,0,0.06);
    --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.1), 0 2px 4px -1px rgba(0,0,0,0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.1), 0 4px 6px -2px rgba(0,0,0,0.05);
    --radius: 8px;
    --radius-lg: 12px;
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; font-family: var(--font-sans); font-size: 16px; line-height: 1.6; color: var(--gray-800); background: var(--gray-50); }
a { color: var(--primary); text-decoration: none; }
a:hover { text-decoration: underline; }
a.btn { color: inherit; }
a.btn:hover { text-decoration: none; }
img { max-width: 100%; height: auto; }
h1,h2,h3,h4,h5,h6 { margin: 0 0 0.5rem; font-weight: 600; line-height: 1.3; color: var(--gray-900); }

/* Utilities */
.container { max-width: 1200px; margin: 0 auto; padding: 0 1rem; }
.text-center { text-align: center; }
.text-muted { color: var(--gray-500); }
.d-block { display: block; }
.d-none { display: none; }
.mb-1 { margin-bottom: 0.5rem; }
.mb-2 { margin-bottom: 1rem; }
.mb-3 { margin-bottom: 1.5rem; }

/* Buttons */
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 0.5rem; padding: 0.625rem 1.25rem; font-size: 0.875rem; font-weight: 500; border-radius: var(--radius); border: none; cursor: pointer; transition: all 0.2s; text-decoration: none; }
.btn:hover { text-decoration: none; transform: translateY(-1px); }
.btn-primary { background: var(--primary); color: #fff !important; }
.btn-primary:hover { background: var(--primary-dark); color: #fff !important; }
.btn-secondary { background: var(--gray-600); color: #fff; }
.btn-success { background: var(--success); color: #fff; }
.btn-warning { background: var(--warning); color: #fff; }
.btn-danger { background: var(--danger); color: #fff; }
.btn-outline { background: transparent; border: 2px solid var(--primary); color: var(--primary) !important; }
.btn-outline:hover { background: var(--primary); color: #fff !important; }
.btn-ghost { background: transparent; color: var(--gray-600); }
.btn-ghost:hover { background: var(--gray-100); }
.btn-sm { padding: 0.375rem 0.75rem; font-size: 0.8125rem; }
.btn-lg { padding: 0.875rem 1.75rem; font-size: 1rem; }
.btn-icon { padding: 0.5rem; min-width: 36px; }
.btn.loading .btn-text { display: none; }
.btn .btn-loading { display: none; }
.btn.loading .btn-loading { display: inline; }

/* Forms */
.form-group { margin-bottom: 1rem; }
.form-group label { display: block; margin-bottom: 0.375rem; font-size: 0.875rem; font-weight: 500; color: var(--gray-700); }
.form-control { width: 100%; padding: 0.625rem 0.875rem; font-size: 0.9375rem; border: 1px solid var(--gray-300); border-radius: var(--radius); background: #fff; 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(30,64,175,0.1); }
.form-control-sm { padding: 0.375rem 0.625rem; font-size: 0.8125rem; }
.form-control-color { padding: 0.25rem; height: 42px; }
textarea.form-control { resize: vertical; min-height: 100px; }
select.form-control { appearance: none; background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' fill='%2364748b' viewBox='0 0 16 16'%3E%3Cpath d='M8 11L3 6h10l-5 5z'/%3E%3C/svg%3E"); background-repeat: no-repeat; background-position: right 0.75rem center; padding-right: 2.5rem; }
.form-row { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1rem; }
.form-error, .form-success { padding: 0.75rem 1rem; border-radius: var(--radius); font-size: 0.875rem; display: none; margin-bottom: 1rem; }
.form-error { background: #fef2f2; color: var(--danger); border: 1px solid #fecaca; }
.form-success { background: #f0fdf4; color: var(--success); border: 1px solid #bbf7d0; }
.field-error { display: block; color: var(--danger); font-size: 0.8125rem; margin-top: 0.25rem; }
.field-hint { display: block; color: var(--gray-500); font-size: 0.8125rem; margin-top: 0.25rem; }
.has-error .form-control { border-color: var(--danger); }
.input-icon { position: relative; }
.input-icon i:first-child { position: absolute; left: 0.875rem; top: 50%; transform: translateY(-50%); color: var(--gray-400); }
.input-icon .form-control { padding-left: 2.5rem; }
.input-icon .toggle-password { position: absolute; right: 0.5rem; top: 50%; transform: translateY(-50%); background: none; border: none; padding: 0.25rem; cursor: pointer; color: var(--gray-400); }
.checkbox-label { display: flex; align-items: center; gap: 0.5rem; cursor: pointer; }
.checkbox-label input[type="checkbox"] { width: 1.125rem; height: 1.125rem; accent-color: var(--primary); }

/* Badges */
.badge { display: inline-flex; align-items: center; gap: 0.25rem; padding: 0.25rem 0.625rem; font-size: 0.75rem; font-weight: 500; border-radius: 9999px; }
.badge-primary { background: #dbeafe; color: var(--primary); }
.badge-secondary { background: var(--gray-200); color: var(--gray-700); }
.badge-success { background: #d1fae5; color: #047857; }
.badge-warning { background: #fef3c7; color: #b45309; }
.badge-danger { background: #fee2e2; color: #b91c1c; }
.badge-info { background: #cffafe; color: #0e7490; }

/* Tables */
.data-table { width: 100%; border-collapse: collapse; background: #fff; border-radius: var(--radius-lg); overflow: hidden; box-shadow: var(--shadow); }
.data-table th, .data-table td { padding: 0.875rem 1rem; text-align: left; border-bottom: 1px solid var(--gray-200); }
.data-table th { background: var(--gray-50); font-weight: 600; font-size: 0.8125rem; text-transform: uppercase; letter-spacing: 0.025em; color: var(--gray-600); }
.data-table tbody tr:hover { background: var(--gray-50); }
.data-table tbody tr:last-child td { border-bottom: none; }
.action-buttons { display: flex; gap: 0.375rem; }

/* Cards */
.card { background: #fff; border-radius: var(--radius-lg); box-shadow: var(--shadow); overflow: hidden; }
.card-header { padding: 1.25rem 1.5rem; border-bottom: 1px solid var(--gray-200); }
.card-header h2, .card-header h3 { margin: 0; display: flex; align-items: center; gap: 0.5rem; }
.card-header p { margin: 0.25rem 0 0; color: var(--gray-500); font-size: 0.875rem; }
.card-body { padding: 1.5rem; }

/* Alerts */
.alert { padding: 1rem 1.25rem; border-radius: var(--radius); margin-bottom: 1rem; display: flex; align-items: flex-start; gap: 0.75rem; }
.alert i { margin-top: 0.125rem; }
.alert-success { background: #f0fdf4; color: #166534; border-left: 4px solid var(--success); }
.alert-warning { background: #fffbeb; color: #92400e; border-left: 4px solid var(--warning); }
.alert-danger { background: #fef2f2; color: #991b1b; border-left: 4px solid var(--danger); }
.alert-info { background: #f0f9ff; color: #075985; border-left: 4px solid var(--info); }

/* Flash Messages */
.flash-messages { position: fixed; top: 1rem; right: 1rem; z-index: 1000; display: flex; flex-direction: column; gap: 0.5rem; }
.flash-message { padding: 0.875rem 1.25rem; border-radius: var(--radius); box-shadow: var(--shadow-lg); animation: slideIn 0.3s ease; }
@keyframes slideIn { from { opacity: 0; transform: translateX(100%); } to { opacity: 1; transform: translateX(0); } }

/* Tabs */
.content-tabs { display: flex; gap: 0.25rem; margin-bottom: 1.5rem; border-bottom: 2px solid var(--gray-200); }
.tab-btn { padding: 0.75rem 1.25rem; background: none; border: none; font-size: 0.9375rem; font-weight: 500; color: var(--gray-500); cursor: pointer; border-bottom: 2px solid transparent; margin-bottom: -2px; transition: all 0.2s; }
.tab-btn:hover { color: var(--gray-700); }
.tab-btn.active { color: var(--primary); border-bottom-color: var(--primary); }
.tab-content { display: none; }
.tab-content.active { display: block; }

/* Modal */
.modal-overlay { position: fixed; inset: 0; background: rgba(0,0,0,0.5); z-index: 1000; display: flex; align-items: center; justify-content: center; opacity: 0; visibility: hidden; transition: all 0.2s; }
.modal-overlay.active { opacity: 1; visibility: visible; }
.modal { background: #fff; border-radius: var(--radius-lg); box-shadow: var(--shadow-lg); width: 100%; max-width: 650px; max-height: 90vh; overflow: auto; transform: scale(0.95); transition: transform 0.2s; }
.modal-overlay.active .modal { transform: scale(1); }
.modal-header { padding: 1.25rem 1.5rem; border-bottom: 1px solid var(--gray-200); display: flex; justify-content: space-between; align-items: center; }
.modal-header h3 { margin: 0; }
.modal-close { background: none; border: none; font-size: 1.5rem; cursor: pointer; color: var(--gray-400); line-height: 1; }
.modal-body { padding: 1.5rem; }
.modal-footer { padding: 1rem 1.5rem; border-top: 1px solid var(--gray-200); display: flex; justify-content: flex-end; gap: 0.75rem; }

/* Notification */
.notification { position: fixed; bottom: 1.5rem; right: 1.5rem; z-index: 1100; padding: 1rem 1.5rem; border-radius: var(--radius); box-shadow: var(--shadow-lg); animation: slideUp 0.3s ease; }
.notification.success { background: var(--success); color: #fff; }
.notification.error { background: var(--danger); color: #fff; }
@keyframes slideUp { from { opacity: 0; transform: translateY(1rem); } to { opacity: 1; transform: translateY(0); } }