/* ============================================
   COMPONENTS.CSS - Reusable UI Components
   ============================================ */

/* ============================================
   NAVIGATION BAR
   ============================================ */

.navbar {
    background-color: var(--bg-secondary);
    border-bottom: 1px solid var(--border-primary);
    box-shadow: var(--shadow-sm);
}

.navbar-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 70px;
    padding: 0 2rem;
    max-width: 1600px;
    margin: 0 auto;
}

.navbar-brand {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    text-decoration: none;
    color: var(--text-primary);
    transition: opacity var(--transition-fast);
}

.navbar-brand:hover {
    opacity: 0.8;
}

.navbar-logo {
    height: 40px;
    width: auto;
}

.navbar-title {
    font-size: 1.25rem;
    font-weight: 700;
    font-style: italic;
    letter-spacing: 0.5px;
    color: var(--text-primary);
}

.navbar-nav {
    display: flex;
    align-items: center;
    gap: 2rem;
    list-style: none;
    margin: 0;
    padding: 0;
}

.navbar-nav-item {
    position: relative;
}

.navbar-nav-link {
    display: flex;
    align-items: center;
    padding: 0.5rem 0;
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.9375rem;
    font-weight: 500;
    transition: color var(--transition-fast);
    position: relative;
}

.navbar-nav-link:hover {
    color: var(--text-primary);
}

.navbar-nav-link.active {
    color: var(--accent-primary);
}

.navbar-nav-link.active::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 2px;
    background-color: var(--accent-primary);
}

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

.navbar-user {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    color: var(--text-secondary);
    font-size: 0.9375rem;
}

.navbar-user-email {
    color: var(--text-primary);
    font-weight: 500;
}

/* Hamburger Menu Button */
.navbar-toggle {
    display: none;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    width: 40px;
    height: 40px;
    background: transparent;
    border: none;
    cursor: pointer;
    padding: 0;
    z-index: 1100;
}

.navbar-toggle-icon {
    position: relative;
    width: 24px;
    height: 2px;
    background-color: var(--text-primary);
    transition: all var(--transition-normal);
}

.navbar-toggle-icon::before,
.navbar-toggle-icon::after {
    content: '';
    position: absolute;
    width: 24px;
    height: 2px;
    background-color: var(--text-primary);
    transition: all var(--transition-normal);
}

.navbar-toggle-icon::before {
    top: -8px;
}

.navbar-toggle-icon::after {
    bottom: -8px;
}

.navbar-toggle.active .navbar-toggle-icon {
    background-color: transparent;
}

.navbar-toggle.active .navbar-toggle-icon::before {
    top: 0;
    transform: rotate(45deg);
}

.navbar-toggle.active .navbar-toggle-icon::after {
    bottom: 0;
    transform: rotate(-45deg);
}

/* Mobile Menu Overlay */
.navbar-mobile-menu {
    display: none;
    position: fixed;
    top: 70px;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: var(--bg-primary);
    z-index: 1050;
    overflow-y: auto;
    opacity: 0;
    pointer-events: none;
    transition: opacity var(--transition-normal);
}

.navbar-mobile-menu.active {
    opacity: 1;
    pointer-events: auto;
}

.navbar-mobile-menu-content {
    padding: 2rem;
}

.navbar-mobile-nav {
    list-style: none;
    margin: 0;
    padding: 0;
}

.navbar-mobile-nav-item {
    margin-bottom: 0.5rem;
}

.navbar-mobile-nav-link {
    display: block;
    padding: 1rem;
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 1.125rem;
    font-weight: 500;
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

.navbar-mobile-nav-link:hover,
.navbar-mobile-nav-link.active {
    color: var(--text-primary);
    background-color: var(--bg-secondary);
}

.navbar-mobile-actions {
    margin-top: 2rem;
    padding-top: 2rem;
    border-top: 1px solid var(--border-primary);
}

.navbar-mobile-user {
    margin-bottom: 1.5rem;
    padding: 1rem;
    background-color: var(--bg-secondary);
    border-radius: var(--radius-md);
    color: var(--text-secondary);
    font-size: 0.9375rem;
}

.navbar-mobile-user-email {
    display: block;
    color: var(--text-primary);
    font-weight: 600;
    margin-bottom: 0.25rem;
}

/* ============================================
   BUTTONS (Extended)
   ============================================ */

.btn-group {
    display: inline-flex;
    gap: 0.5rem;
}

.btn-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    padding: 0;
    border-radius: var(--radius-md);
}

.btn-block {
    display: flex;
    width: 100%;
}

.btn-link {
    background: transparent;
    border: none;
    color: var(--accent-primary);
    padding: 0.5rem 1rem;
    font-weight: 500;
}

.btn-link:hover:not(:disabled) {
    color: var(--accent-primary-hover);
    background: transparent;
}

/* ============================================
   FORM COMPONENTS (Extended)
   ============================================ */

.form-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1rem;
}

.form-check {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.form-checkbox,
.form-radio {
    width: 18px;
    height: 18px;
    cursor: pointer;
    accent-color: var(--accent-primary);
}

.form-error {
    color: var(--color-danger);
    font-size: 0.875rem;
    margin-top: 0.375rem;
}

.form-help {
    color: var(--text-tertiary);
    font-size: 0.875rem;
    margin-top: 0.375rem;
}

/* ============================================
   DROPDOWN MENU
   ============================================ */

.dropdown {
    position: relative;
    display: inline-block;
}

.dropdown-toggle {
    cursor: pointer;
}

.dropdown-menu {
    position: absolute;
    top: 100%;
    right: 0;
    margin-top: 0.5rem;
    min-width: 200px;
    background-color: var(--bg-elevated);
    border: 1px solid var(--border-primary);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    padding: 0.5rem 0;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all var(--transition-fast);
    z-index: var(--z-dropdown);
}

.dropdown.active .dropdown-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.dropdown-item {
    display: block;
    padding: 0.625rem 1.25rem;
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.9375rem;
    transition: all var(--transition-fast);
}

.dropdown-item:hover {
    background-color: var(--bg-hover);
    color: var(--text-primary);
}

.dropdown-divider {
    height: 1px;
    margin: 0.5rem 0;
    background-color: var(--border-primary);
}

/* ============================================
   TABS
   ============================================ */

.tabs {
    display: flex;
    border-bottom: 1px solid var(--border-primary);
    margin-bottom: 1.5rem;
}

.tab {
    padding: 1rem 1.5rem;
    color: var(--text-secondary);
    background: transparent;
    border: none;
    border-bottom: 2px solid transparent;
    cursor: pointer;
    font-size: 0.9375rem;
    font-weight: 500;
    transition: all var(--transition-fast);
}

.tab:hover {
    color: var(--text-primary);
    background-color: var(--bg-hover);
}

.tab.active {
    color: var(--accent-primary);
    border-bottom-color: var(--accent-primary);
}

.tab-content {
    display: none;
}

.tab-content.active {
    display: block;
}

/* ============================================
   MODAL
   ============================================ */

.modal-backdrop {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(0, 0, 0, 0.75);
    z-index: var(--z-modal-backdrop);
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-normal);
}

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

.modal {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%) scale(0.9);
    max-width: 600px;
    width: 90%;
    max-height: 90vh;
    background-color: var(--bg-secondary);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-xl);
    z-index: var(--z-modal);
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-normal);
    overflow: hidden;
}

.modal.active {
    opacity: 1;
    visibility: visible;
    transform: translate(-50%, -50%) scale(1);
}

/* Large modal for documentation */
#backtestHelpModal,
#strategyHelpModal {
    max-width: 900px;
}

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

.modal-title {
    font-size: 1.25rem;
    font-weight: 600;
    margin: 0;
}

.modal-close {
    background: transparent;
    border: none;
    color: var(--text-secondary);
    font-size: 1.5rem;
    cursor: pointer;
    padding: 0;
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
}

.modal-close:hover {
    background-color: var(--bg-hover);
    color: var(--text-primary);
}

.modal-body {
    padding: 1.5rem;
    overflow-y: auto;
    max-height: calc(90vh - 140px);
}

.modal-footer {
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: 1rem;
    padding: 1.5rem;
    border-top: 1px solid var(--border-primary);
}

/* ============================================
   LOADING SPINNER
   ============================================ */

.spinner {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 2px solid var(--border-primary);
    border-top-color: var(--accent-primary);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
    vertical-align: middle;
}

/* Spinner inside buttons */
.btn .spinner {
    margin-right: 0.5rem;
    border-color: currentColor;
    border-top-color: transparent;
    opacity: 0.7;
}

/* Button loading state */
.btn.btn-loading {
    cursor: not-allowed;
    opacity: 0.8;
}

.spinner-lg {
    width: 40px;
    height: 40px;
    border-width: 3px;
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}

/* ============================================
   RESPONSIVE - MOBILE (< 1024px)
   ============================================ */

@media (max-width: 1024px) {
    
    .navbar-container {
        padding: 0 1.5rem;
    }
    
    .navbar-nav {
        display: none;
    }
    
    .navbar-actions {
        display: none;
    }
    
    .navbar-toggle {
        display: flex;
    }
    
    .navbar-mobile-menu {
        display: block;
    }
}

@media (max-width: 480px) {
    
    .navbar-container {
        padding: 0 1rem;
        height: 60px;
    }
    
    .navbar-logo {
        height: 32px;
    }
    
    .navbar-title {
        font-size: 1rem;
    }
    
    .navbar-mobile-menu {
        top: 60px;
    }
    
    .navbar-mobile-menu-content {
        padding: 1.5rem;
    }
    
    .modal {
        width: 95%;
        max-height: 95vh;
    }
}