/* ============================================================
   Global styles and CSS variables
   All variables are defined here so other files can reuse them.
   ============================================================ */

:root {
    --primary: #4f46e5;
    --primary-dark: #4338ca;
    --primary-light: #818cf8;
    --danger: #dc2626;
    --success: #16a34a;
    --warning: #f59e0b;
    --info: #0ea5e9;
    --text: #1f2937;
    --text-muted: #6b7280;
    --bg: #f3f4f6;
    --card-bg: #ffffff;
    --border: #d1d5db;
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -2px rgba(0, 0, 0, 0.1);
    --radius: 0.5rem;
    --font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    --header-height: 64px;
    --max-width: 1200px;
}

* {
    box-sizing: border-box;
}

html,
body {
    margin: 0;
    padding: 0;
    min-height: 100%;
    font-family: var(--font);
    color: var(--text);
    background-color: var(--bg);
}

body {
    display: flex;
    flex-direction: column;
}

#page_wrap {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

.site-main {
    flex: 1;
    padding: 1.5rem 1rem;
}

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

a:hover {
    text-decoration: underline;
}

/* Header */
#site-header {
    background: var(--card-bg);
    border-bottom: 1px solid var(--border);
    height: var(--header-height);
    position: sticky;
    top: 0;
    z-index: 100;
}

.header-inner {
    max-width: var(--max-width);
    margin: 0 auto;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 1.5rem;
}

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary);
}

#main-nav {
    display: flex;
    align-items: center;
}

#main-nav a {
    margin-left: 1.5rem;
    font-weight: 500;
    color: var(--text);
}

#main-nav .nav-item.dropdown {
    margin-left: 1.5rem;
}

#main-nav a:hover,
#main-nav .dropdown-toggle:hover {
    color: var(--primary);
}

/* Avatars */
.avatar {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: var(--primary);
    color: #fff;
    font-weight: 600;
    font-size: 0.9rem;
    object-fit: cover;
    overflow: hidden;
    flex-shrink: 0;
}

.avatar img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.avatar-sm { width: 32px; height: 32px; font-size: 0.8rem; }
.avatar-md { width: 48px; height: 48px; font-size: 1rem; }
.avatar-lg { width: 80px; height: 80px; font-size: 1.75rem; }

/* Dropdown menus */
.nav-item.dropdown {
    position: relative;
}

.dropdown-toggle {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    background: transparent;
    border: none;
    color: var(--text);
    font: inherit;
    font-weight: 500;
    cursor: pointer;
    padding: 0;
}

.dropdown-caret {
    font-size: 0.75rem;
    opacity: 0.7;
}

.dropdown-menu {
    display: none;
    position: absolute;
    top: calc(100% + 0.5rem);
    right: 0;
    min-width: 200px;
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 0.5rem 0;
    z-index: 101;
}

.dropdown-menu a {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin: 0;
    padding: 0.6rem 1rem;
    color: var(--text);
    font-weight: 400;
    white-space: nowrap;
}

.dropdown-menu a:hover {
    background: #f3f4f6;
    color: var(--primary);
    text-decoration: none;
}

.nav-item.dropdown.open .dropdown-menu {
    display: block;
}

#main-nav .user-name {
    max-width: 120px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

#mobile-menu-toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
}

.hamburger,
.hamburger::before,
.hamburger::after {
    display: block;
    width: 24px;
    height: 3px;
    background: var(--text);
    border-radius: 2px;
    content: '';
    position: relative;
}

.hamburger::before {
    top: -7px;
    position: absolute;
}

.hamburger::after {
    top: 7px;
    position: absolute;
}

/* Footer */
#site-footer {
    background: var(--card-bg);
    border-top: 1px solid var(--border);
    padding: 1.5rem;
}

.footer-content {
    max-width: var(--max-width);
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem;
    color: var(--text-muted);
    font-size: 0.9rem;
}

.footer-links a {
    margin-left: 1rem;
    color: var(--text-muted);
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.625rem 1.25rem;
    border: none;
    border-radius: var(--radius);
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    text-decoration: none;
    transition: background 0.2s, transform 0.1s;
}

.btn:hover {
    text-decoration: none;
}

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

.btn-primary:hover {
    background: var(--primary-dark);
}

.btn-secondary {
    background: #e5e7eb;
    color: var(--text);
}

.btn-secondary:hover {
    background: #d1d5db;
}

.btn-danger {
    background: var(--danger);
    color: #fff;
}

.btn-danger:hover {
    background: #b91c1c;
}

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

.form-group label {
    display: block;
    margin-bottom: 0.35rem;
    font-weight: 500;
    font-size: 0.95rem;
}

.form-group input[type="text"],
.form-group input[type="email"],
.form-group input[type="password"],
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 0.65rem 0.85rem;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    font-size: 1rem;
    background: #fff;
    transition: border-color 0.2s, box-shadow 0.2s;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.15);
}

.field-error {
    display: block;
    color: var(--danger);
    font-size: 0.85rem;
    margin-top: 0.25rem;
    min-height: 1.2em;
}

.checkbox {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    cursor: pointer;
}

.checkbox input {
    width: 1rem;
    height: 1rem;
    accent-color: var(--primary);
}

/* Page content helpers */
.page-content {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 1rem 0;
}

.error-page {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 50vh;
}

.error-card {
    text-align: center;
    background: var(--card-bg);
    padding: 3rem;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    max-width: 500px;
    width: 100%;
}

.error-card h1 {
    margin-top: 0;
    color: var(--primary);
}

/* Loading / spinners */
.btn-spinner {
    display: none;
}

.btn.loading .btn-label {
    opacity: 0.7;
}

.btn.loading .btn-spinner {
    display: inline-block;
}

.hide {
    display: none !important;
}

/* Modal */
.modal-window {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.5);
    align-items: center;
    justify-content: center;
    z-index: 1000;
    padding: 1rem;
}

.modal-window.open {
    display: flex;
}

.modal-content {
    background: var(--card-bg);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    width: 100%;
    max-width: 500px;
    max-height: 90vh;
    overflow-y: auto;
    padding: 1.5rem;
}

.modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 1rem;
    padding-bottom: 0.75rem;
    border-bottom: 1px solid var(--border);
}

.modal-header h3 {
    margin: 0;
    font-size: 1.15rem;
}

.modal-body {
    margin-bottom: 1rem;
}

.modal-footer {
    display: flex;
    justify-content: flex-end;
    gap: 0.75rem;
}

/* Toast notifications */
#toast-container {
    position: fixed;
    top: 80px;
    right: 1rem;
    z-index: 1000;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.toast {
    background: var(--card-bg);
    border-left: 4px solid var(--primary);
    box-shadow: var(--shadow);
    padding: 1rem 1.25rem;
    border-radius: var(--radius);
    min-width: 280px;
    max-width: 400px;
    animation: slideIn 0.3s ease;
}

.toast.success { border-left-color: var(--success); }
.toast.error { border-left-color: var(--danger); }
.toast.warning { border-left-color: var(--warning); }

@keyframes slideIn {
    from { transform: translateX(120%); opacity: 0; }
    to { transform: translateX(0); opacity: 1; }
}

/* Responsive */
@media (max-width: 768px) {
    #main-nav:not(.mobile-open) {
        display: none;
    }

    #main-nav.mobile-open {
        display: flex;
        flex-direction: column;
        position: absolute;
        top: var(--header-height);
        left: 0;
        right: 0;
        background: var(--card-bg);
        border-bottom: 1px solid var(--border);
        box-shadow: var(--shadow);
        padding: 1rem 1.5rem;
        gap: 0.25rem;
        z-index: 99;
    }

    #main-nav.mobile-open > a,
    #main-nav.mobile-open .dropdown-toggle {
        margin-left: 0;
        padding: 0.5rem 0;
    }

    #main-nav.mobile-open .dropdown-menu {
        position: static;
        display: none;
        box-shadow: none;
        border: none;
        padding: 0 0 0 1rem;
    }

    #main-nav.mobile-open .nav-item.dropdown.open .dropdown-menu {
        display: flex;
        flex-direction: column;
        gap: 0.25rem;
    }

    #mobile-menu-toggle {
        display: block;
    }

    .footer-content {
        flex-direction: column;
        text-align: center;
    }
}