/* PEBL Online Platform - Modern UI
 * Professional layout with top navigation and project sidebar
 */

/* ===== CSS Variables ===== */
:root {
    /* Colors - Modern blue palette */
    --primary-blue: #0066cc;
    --primary-blue-dark: #004d99;
    --primary-blue-light: #3385d6;
    --accent-blue: #0099ff;

    /* Neutrals */
    --white: #ffffff;
    --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;

    /* Status colors */
    --success-green: #10b981;
    --warning-yellow: #f59e0b;
    --error-red: #ef4444;
    --info-blue: #3b82f6;

    /* Layout */
    --topnav-height: 60px;
    --sidebar-width: 280px;
    --sidebar-collapsed-width: 0px;
    --content-max-width: 1400px;

    /* Spacing */
    --spacing-xs: 4px;
    --spacing-sm: 8px;
    --spacing-md: 16px;
    --spacing-lg: 24px;
    --spacing-xl: 32px;

    /* Border radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;

    /* Shadows */
    --shadow-sm: 0 1px 2px 0 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);

    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 250ms ease;
}

/* ===== Global Reset ===== */
* {
    box-sizing: border-box;
}

body {
    margin: 0;
    padding: 0;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    font-size: 15px;
    line-height: 1.5;
    color: var(--gray-900);
    background: var(--gray-50);
}

/* ===== Top Navigation Bar ===== */
.topnav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--topnav-height);
    background: var(--white);
    border-bottom: 1px solid var(--gray-200);
    box-shadow: var(--shadow-sm);
    z-index: 1000;
}

.topnav-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 100%;
    padding: 0 var(--spacing-lg);
    max-width: none;
}

.topnav-brand {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    text-decoration: none;
    color: var(--gray-900);
    font-weight: 600;
    font-size: 18px;
}

.topnav-brand img {
    height: 36px;
}

.topnav-menu {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    list-style: none;
    margin: 0;
    padding: 0;
}

.topnav-menu li {
    margin: 0;
    padding: 0;
}

.topnav-link {
    display: block;
    padding: var(--spacing-sm) var(--spacing-md);
    color: var(--gray-700);
    text-decoration: none;
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
    font-size: 14px;
    font-weight: 500;
}

.topnav-link:hover {
    background: var(--gray-100);
    color: var(--primary-blue);
}

.topnav-link.active {
    background: var(--primary-blue);
    color: var(--white);
}

/* User menu on right */
.topnav-user {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.topnav-user-name {
    color: var(--gray-700);
    font-size: 14px;
}

.topnav-avatar {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background: var(--primary-blue);
    color: var(--white);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    font-size: 14px;
}

/* Hamburger menu for mobile */
.topnav-hamburger {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--spacing-sm);
    color: var(--gray-700);
}

.topnav-hamburger:hover {
    color: var(--primary-blue);
}

/* ===== Layout Container ===== */
.layout-container {
    display: flex;
    margin-top: var(--topnav-height);
    min-height: calc(100vh - var(--topnav-height));
}

/* ===== Project Sidebar ===== */
.project-sidebar {
    position: fixed;
    left: 0;
    top: var(--topnav-height);
    width: var(--sidebar-width);
    height: calc(100vh - var(--topnav-height));
    background: var(--white);
    border-right: 1px solid var(--gray-200);
    overflow-y: auto;
    overflow-x: hidden;
    flex-shrink: 0;
    z-index: 100;
    display: flex;
    flex-direction: column;
}

.project-sidebar-header {
    padding: var(--spacing-lg);
    border-bottom: 1px solid var(--gray-200);
}

.project-sidebar-title {
    font-size: 12px;
    font-weight: 600;
    color: var(--gray-500);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin: 0 0 var(--spacing-md) 0;
}

.project-list {
    list-style: none;
    margin: 0;
    padding: var(--spacing-md);
}

.project-item {
    margin-bottom: var(--spacing-sm);
}

.project-link {
    display: block;
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    text-decoration: none;
    color: var(--gray-900);
    transition: all var(--transition-fast);
    border: 1px solid transparent;
}

.project-link:hover {
    background: var(--gray-50);
    border-color: var(--gray-200);
}

.project-link.active {
    background: var(--primary-blue);
    color: var(--white);
}

.project-name {
    font-weight: 500;
    font-size: 14px;
    margin-bottom: var(--spacing-xs);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.project-status-badge {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    font-size: 11px;
    font-weight: 600;
    padding: 2px 6px;
    border-radius: 3px;
}

.project-status-badge.active {
    background: rgba(16, 185, 129, 0.1);
    color: var(--success-green);
}

.project-status-badge.draft {
    background: rgba(156, 163, 175, 0.1);
    color: var(--gray-600);
}

.project-status-badge.disabled {
    background: rgba(245, 158, 11, 0.1);
    color: var(--warning-yellow);
}

.project-meta {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    font-size: 12px;
    color: var(--gray-500);
    margin-top: var(--spacing-xs);
}

.project-stat {
    display: flex;
    align-items: center;
    gap: 4px;
}

/* When sidebar is on active project */
.project-link.active .project-meta {
    color: rgba(255, 255, 255, 0.8);
}

/* ===== Main Content Area ===== */
.main-content {
    flex: 1;
    padding: var(--spacing-xl);
    max-width: var(--content-max-width);
    margin: 0 auto;
    width: 100%;
    margin-left: var(--sidebar-width);
}

.main-content-inner {
    background: var(--white);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    box-shadow: var(--shadow-sm);
}

/* ===== Typography ===== */
h1, h2, h3, h4, h5, h6 {
    margin: 0 0 var(--spacing-lg) 0;
    font-weight: 600;
    line-height: 1.2;
    color: var(--gray-900);
}

h1 { font-size: 32px; }
h2 { font-size: 24px; }
h3 { font-size: 20px; }
h4 { font-size: 18px; }

p {
    margin: 0 0 var(--spacing-md) 0;
}

a {
    color: var(--primary-blue);
    text-decoration: none;
}

a:hover {
    color: var(--primary-blue-dark);
    text-decoration: underline;
}

/* ===== Buttons ===== */
.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-md);
    border: 1px solid transparent;
    border-radius: var(--radius-sm);
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-fast);
    text-decoration: none;
}

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

.btn-primary:hover {
    background: var(--primary-blue-dark);
    border-color: var(--primary-blue-dark);
    text-decoration: none;
}

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

.btn-secondary:hover {
    background: var(--gray-50);
    text-decoration: none;
}

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

.btn-success:hover {
    background: #059669;
    text-decoration: none;
}

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

.btn-danger:hover {
    background: #dc2626;
    text-decoration: none;
}

/* ===== Cards ===== */
.card {
    background: var(--white);
    border: 1px solid var(--gray-200);
    border-radius: var(--radius-md);
    padding: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
}

.card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--spacing-md);
    padding-bottom: var(--spacing-md);
    border-bottom: 1px solid var(--gray-200);
}

.card-title {
    font-size: 18px;
    font-weight: 600;
    margin: 0;
}

.card-body {
    font-size: 14px;
    color: var(--gray-700);
}

/* ===== Tables ===== */
table {
    width: 100%;
    border-collapse: collapse;
    margin: var(--spacing-lg) 0;
}

th {
    text-align: left;
    padding: var(--spacing-md);
    font-weight: 600;
    font-size: 12px;
    color: var(--gray-600);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    border-bottom: 2px solid var(--gray-200);
}

td {
    padding: var(--spacing-md);
    border-bottom: 1px solid var(--gray-200);
}

tr:hover {
    background: var(--gray-50);
}

/* ===== Forms ===== */
input, select, textarea {
    width: 100%;
    padding: var(--spacing-sm) var(--spacing-md);
    border: 1px solid var(--gray-300);
    border-radius: var(--radius-sm);
    font-size: 14px;
    font-family: inherit;
    transition: border-color var(--transition-fast);
}

input:focus, select:focus, textarea:focus {
    outline: none;
    border-color: var(--primary-blue);
    box-shadow: 0 0 0 3px rgba(0, 102, 204, 0.1);
}

label {
    display: block;
    margin-bottom: var(--spacing-xs);
    font-weight: 500;
    font-size: 14px;
    color: var(--gray-700);
}

/* ===== Status Badges ===== */
.badge {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 4px 8px;
    border-radius: var(--radius-sm);
    font-size: 12px;
    font-weight: 600;
}

.badge-active {
    background: rgba(16, 185, 129, 0.1);
    color: var(--success-green);
}

.badge-draft {
    background: rgba(156, 163, 175, 0.1);
    color: var(--gray-600);
}

.badge-disabled {
    background: rgba(245, 158, 11, 0.1);
    color: var(--warning-yellow);
}

/* ===== Responsive Design ===== */
@media (max-width: 768px) {
    .topnav-hamburger {
        display: block;
    }

    .topnav-menu {
        position: fixed;
        top: var(--topnav-height);
        left: 0;
        right: 0;
        background: var(--white);
        flex-direction: column;
        align-items: stretch;
        padding: var(--spacing-md);
        border-bottom: 1px solid var(--gray-200);
        box-shadow: var(--shadow-md);
        display: none;
    }

    .topnav-menu.open {
        display: flex;
    }

    .topnav-link {
        padding: var(--spacing-md);
    }

    .project-sidebar {
        position: fixed;
        left: 0;
        top: var(--topnav-height);
        bottom: 0;
        transform: translateX(-100%);
        transition: transform var(--transition-base);
        z-index: 900;
    }

    .project-sidebar.open {
        transform: translateX(0);
    }

    .main-content {
        padding: var(--spacing-md);
        margin-left: 0;  /* Remove sidebar offset on mobile */
    }

    .main-content-inner {
        padding: var(--spacing-md);
    }
}

@media (max-width: 1024px) {
    .project-sidebar {
        width: 250px;
    }
}

/* ===== Utilities ===== */
.text-center { text-align: center; }
.text-right { text-align: right; }
.mt-0 { margin-top: 0; }
.mb-0 { margin-bottom: 0; }
.mb-sm { margin-bottom: var(--spacing-sm); }
.mb-md { margin-bottom: var(--spacing-md); }
.mb-lg { margin-bottom: var(--spacing-lg); }
.flex { display: flex; }
.flex-between { justify-content: space-between; }
.flex-center { align-items: center; }
.gap-sm { gap: var(--spacing-sm); }
.gap-md { gap: var(--spacing-md); }

/* ===== Alpine.js AJAX Navigation ===== */

/* Page loading indicator */
.page-loading-indicator {
    position: fixed;
    top: var(--topnav-height);
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(
        to right,
        var(--primary-blue) 0%,
        var(--accent-blue) 50%,
        var(--primary-blue) 100%
    );
    background-size: 200% 100%;
    animation: loading-shimmer 1.5s ease-in-out infinite;
    z-index: 9999;
    box-shadow: 0 2px 4px rgba(0, 102, 204, 0.3);
}

@keyframes loading-shimmer {
    0% {
        background-position: -200% 0;
    }
    100% {
        background-position: 200% 0;
    }
}

/* Loading spinner (alternative/additional indicator) */
.loading-spinner {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 40px;
    height: 40px;
    border: 3px solid var(--gray-200);
    border-top-color: var(--primary-blue);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
    z-index: 10000;
}

@keyframes spin {
    to { transform: translate(-50%, -50%) rotate(360deg); }
}

/* Content transition */
.main-content-inner {
    transition: opacity 0.15s ease-out;
}

/* Alpine.js transition utilities */
[x-cloak] { display: none !important; }