/**
 * Fitness Campus - UI Components
 * Buttons, Cards, Forms, Navigation, and more
 */

/* ================================================
   BUTTONS
   ================================================ */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    padding: var(--space-4) var(--space-8);
    font-family: var(--font-body);
    font-size: var(--text-base);
    font-weight: var(--font-semibold);
    text-decoration: none;
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-base);
    white-space: nowrap;
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

/* Primary Button - Gold */
.btn-primary {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
    color: var(--color-black);
    box-shadow: 0 4px 20px rgba(201, 162, 39, 0.3);
}

.btn-primary:hover {
    background: linear-gradient(135deg, var(--color-primary-light) 0%, var(--color-primary) 100%);
    transform: translateY(-2px);
    box-shadow: 0 8px 30px rgba(201, 162, 39, 0.4);
    color: var(--color-black);
}

.btn-primary:active {
    transform: translateY(0);
}

/* Secondary Button - Outline */
.btn-secondary {
    background: transparent;
    color: var(--color-white);
    border: 2px solid var(--color-dark-400);
}

.btn-secondary:hover {
    border-color: var(--color-primary);
    color: var(--color-primary);
    background: rgba(201, 162, 39, 0.1);
}

/* Accent Button - Green */
.btn-accent {
    background: linear-gradient(135deg, var(--color-accent) 0%, var(--color-accent-dark) 100%);
    color: var(--color-white);
    box-shadow: 0 4px 20px rgba(16, 185, 129, 0.3);
}

.btn-accent:hover {
    background: linear-gradient(135deg, var(--color-accent-light) 0%, var(--color-accent) 100%);
    transform: translateY(-2px);
    box-shadow: 0 8px 30px rgba(16, 185, 129, 0.4);
    color: var(--color-white);
}

/* Ghost Button */
.btn-ghost {
    background: transparent;
    color: var(--color-white);
    padding: var(--space-2) var(--space-4);
}

.btn-ghost:hover {
    background: rgba(255, 255, 255, 0.1);
    color: var(--color-primary);
}

/* Button Sizes */
.btn-sm {
    padding: var(--space-2) var(--space-4);
    font-size: var(--text-sm);
}

.btn-lg {
    padding: var(--space-5) var(--space-10);
    font-size: var(--text-lg);
}

.btn-block {
    width: 100%;
}

/* Icon Button */
.btn-icon {
    width: 48px;
    height: 48px;
    padding: 0;
    border-radius: var(--radius-full);
}

/* ================================================
   NAVIGATION
   ================================================ */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: var(--z-fixed);
    padding: var(--space-4) 0;
    transition: all var(--transition-base);
}

.navbar.scrolled {
    background: rgba(10, 10, 10, 0.95);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    padding: var(--space-3) 0;
}

.navbar-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.navbar-brand {
    display: flex;
    align-items: center;
    gap: var(--space-3);
}

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

.navbar-brand-text {
    font-family: var(--font-heading);
    font-size: var(--text-xl);
    font-weight: var(--font-bold);
    color: var(--color-white);
}

.navbar-nav {
    display: flex;
    align-items: center;
    gap: var(--space-8);
}

.nav-link {
    font-size: var(--text-sm);
    font-weight: var(--font-medium);
    color: var(--color-gray-100);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    padding: var(--space-2) 0;
    position: relative;
    transition: color var(--transition-fast);
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--color-primary);
    transition: width var(--transition-base);
}

.nav-link:hover,
.nav-link.active {
    color: var(--color-white);
}

.nav-link:hover::after,
.nav-link.active::after {
    width: 100%;
}

.navbar-actions {
    display: flex;
    align-items: center;
    gap: var(--space-4);
}

/* Mobile Menu Toggle */
.menu-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
    padding: var(--space-2);
}

.menu-toggle span {
    width: 24px;
    height: 2px;
    background: var(--color-white);
    transition: all var(--transition-base);
}

/* ================================================
   CARDS
   ================================================ */
.card {
    background: var(--color-dark-800);
    border-radius: var(--radius-xl);
    border: 1px solid var(--color-dark-600);
    overflow: hidden;
    transition: all var(--transition-base);
}

.card:hover {
    border-color: var(--color-dark-400);
    transform: translateY(-4px);
}

.card-body {
    padding: var(--space-6);
}

.card-header {
    padding: var(--space-6);
    border-bottom: 1px solid var(--color-dark-600);
}

.card-footer {
    padding: var(--space-6);
    border-top: 1px solid var(--color-dark-600);
}

/* ================================================
   PRICING CARDS
   ================================================ */
.pricing-card {
    position: relative;
    background: var(--color-dark-800);
    border-radius: var(--radius-2xl);
    border: 1px solid var(--color-dark-600);
    padding: var(--space-8);
    display: flex;
    flex-direction: column;
    transition: all var(--transition-base);
}

.pricing-card:hover {
    border-color: var(--color-primary);
    transform: translateY(-8px);
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
}

.pricing-card.featured {
    border-color: var(--color-primary);
    background: linear-gradient(180deg, rgba(201, 162, 39, 0.1) 0%, var(--color-dark-800) 50%);
}

.pricing-badge {
    position: absolute;
    top: -12px;
    left: 50%;
    transform: translateX(-50%);
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
    color: var(--color-black);
    font-size: var(--text-xs);
    font-weight: var(--font-bold);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    padding: var(--space-2) var(--space-4);
    border-radius: var(--radius-full);
}

.pricing-header {
    text-align: center;
    margin-bottom: var(--space-6);
    padding-bottom: var(--space-6);
    border-bottom: 1px solid var(--color-dark-600);
}

.pricing-name {
    font-size: var(--text-2xl);
    margin-bottom: var(--space-2);
}

.pricing-description {
    font-size: var(--text-sm);
    color: var(--color-gray-200);
}

.pricing-price {
    text-align: center;
    margin-bottom: var(--space-6);
}

.pricing-amount {
    font-family: var(--font-heading);
    font-size: var(--text-5xl);
    font-weight: var(--font-black);
    color: var(--color-white);
}

.pricing-original {
    font-size: var(--text-lg);
    color: var(--color-gray-300);
    text-decoration: line-through;
    margin-right: var(--space-2);
}

.pricing-period {
    font-size: var(--text-sm);
    color: var(--color-gray-200);
}

.pricing-features {
    flex: 1;
    margin-bottom: var(--space-6);
}

.pricing-features li {
    display: flex;
    align-items: flex-start;
    gap: var(--space-3);
    padding: var(--space-3) 0;
    color: var(--color-gray-100);
    font-size: var(--text-sm);
}

.pricing-features .check-icon {
    color: var(--color-accent);
    flex-shrink: 0;
    margin-top: 2px;
}

/* ================================================
   FORMS
   ================================================ */
.form-group {
    margin-bottom: var(--space-6);
}

.form-label {
    display: block;
    font-size: var(--text-sm);
    font-weight: var(--font-medium);
    color: var(--color-white);
    margin-bottom: var(--space-2);
}

.form-input,
.form-textarea,
.form-select {
    width: 100%;
    padding: var(--space-4);
    font-family: var(--font-body);
    font-size: var(--text-base);
    color: var(--color-white);
    background: var(--color-dark-700);
    border: 1px solid var(--color-dark-500);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

.form-input:focus,
.form-textarea:focus,
.form-select:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(201, 162, 39, 0.2);
}

.form-input::placeholder,
.form-textarea::placeholder {
    color: var(--color-gray-300);
}

.form-textarea {
    min-height: 120px;
    resize: vertical;
}

.form-error {
    font-size: var(--text-sm);
    color: var(--color-error);
    margin-top: var(--space-2);
}

.form-hint {
    font-size: var(--text-sm);
    color: var(--color-gray-300);
    margin-top: var(--space-2);
}

/* Checkbox & Radio */
.form-check {
    display: flex;
    align-items: center;
    gap: var(--space-3);
}

.form-check-input {
    width: 20px;
    height: 20px;
    accent-color: var(--color-primary);
}

.form-check-label {
    font-size: var(--text-sm);
    color: var(--color-gray-100);
}

/* ================================================
   ALERTS & NOTIFICATIONS
   ================================================ */
.alert {
    padding: var(--space-4) var(--space-6);
    border-radius: var(--radius-md);
    margin-bottom: var(--space-6);
    display: flex;
    align-items: flex-start;
    gap: var(--space-3);
}

.alert-success {
    background: rgba(16, 185, 129, 0.1);
    border: 1px solid rgba(16, 185, 129, 0.3);
    color: var(--color-accent-light);
}

.alert-error {
    background: rgba(239, 68, 68, 0.1);
    border: 1px solid rgba(239, 68, 68, 0.3);
    color: #fca5a5;
}

.alert-warning {
    background: rgba(245, 158, 11, 0.1);
    border: 1px solid rgba(245, 158, 11, 0.3);
    color: #fcd34d;
}

.alert-info {
    background: rgba(59, 130, 246, 0.1);
    border: 1px solid rgba(59, 130, 246, 0.3);
    color: #93c5fd;
}

/* ================================================
   BADGES
   ================================================ */
.badge {
    display: inline-flex;
    align-items: center;
    padding: var(--space-1) var(--space-3);
    font-size: var(--text-xs);
    font-weight: var(--font-semibold);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    border-radius: var(--radius-full);
}

.badge-primary {
    background: rgba(201, 162, 39, 0.2);
    color: var(--color-primary);
}

.badge-accent {
    background: rgba(16, 185, 129, 0.2);
    color: var(--color-accent);
}

.badge-success {
    background: rgba(16, 185, 129, 0.2);
    color: var(--color-success);
}

.badge-warning {
    background: rgba(245, 158, 11, 0.2);
    color: var(--color-warning);
}

.badge-error {
    background: rgba(239, 68, 68, 0.2);
    color: var(--color-error);
}

/* ================================================
   TABLES
   ================================================ */
.table-wrapper {
    overflow-x: auto;
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-dark-600);
}

.table {
    width: 100%;
    border-collapse: collapse;
}

.table th,
.table td {
    padding: var(--space-4) var(--space-5);
    text-align: left;
}

.table th {
    background: var(--color-dark-700);
    font-size: var(--text-sm);
    font-weight: var(--font-semibold);
    color: var(--color-gray-100);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    border-bottom: 1px solid var(--color-dark-600);
}

.table td {
    background: var(--color-dark-800);
    color: var(--color-gray-100);
    border-bottom: 1px solid var(--color-dark-700);
}

.table tr:last-child td {
    border-bottom: none;
}

.table tr:hover td {
    background: var(--color-dark-700);
}

/* ================================================
   MODALS
   ================================================ */
.modal-backdrop {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.8);
    backdrop-filter: blur(4px);
    z-index: var(--z-modal-backdrop);
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-base);
}

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

.modal {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%) scale(0.9);
    width: 90%;
    max-width: 500px;
    max-height: 90vh;
    background: var(--color-dark-800);
    border: 1px solid var(--color-dark-600);
    border-radius: var(--radius-2xl);
    z-index: var(--z-modal);
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-base);
    overflow-y: auto;
}

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

.modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-6);
    border-bottom: 1px solid var(--color-dark-600);
}

.modal-title {
    font-size: var(--text-xl);
    font-weight: var(--font-semibold);
}

.modal-close {
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: transparent;
    border: none;
    color: var(--color-gray-200);
    cursor: pointer;
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

.modal-close:hover {
    background: var(--color-dark-600);
    color: var(--color-white);
}

.modal-body {
    padding: var(--space-6);
}

.modal-footer {
    display: flex;
    justify-content: flex-end;
    gap: var(--space-4);
    padding: var(--space-6);
    border-top: 1px solid var(--color-dark-600);
}

/* ================================================
   DIVIDERS
   ================================================ */
.divider {
    height: 1px;
    background: var(--color-dark-600);
    margin: var(--space-8) 0;
}

.divider-text {
    display: flex;
    align-items: center;
    gap: var(--space-4);
    color: var(--color-gray-300);
    font-size: var(--text-sm);
}

.divider-text::before,
.divider-text::after {
    content: '';
    flex: 1;
    height: 1px;
    background: var(--color-dark-600);
}

/* ================================================
   LOADING SPINNER
   ================================================ */
.spinner {
    width: 24px;
    height: 24px;
    border: 2px solid var(--color-dark-500);
    border-top-color: var(--color-primary);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

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

.spinner-lg {
    width: 48px;
    height: 48px;
    border-width: 3px;
}

/* ================================================
   AVATAR
   ================================================ */
.avatar {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-full);
    background: var(--color-dark-600);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: var(--font-semibold);
    color: var(--color-primary);
    font-size: var(--text-sm);
    overflow: hidden;
}

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

.avatar-lg {
    width: 64px;
    height: 64px;
    font-size: var(--text-xl);
}

.avatar-xl {
    width: 96px;
    height: 96px;
    font-size: var(--text-2xl);
}