/**
 * Utility Classes - Modern Light Design
 * Clean, minimal components for 2024/2025
 */

/* ==========================================================================
   CONTAINERS
   ========================================================================== */

.container-custom {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1rem;
}

@media (min-width: 640px) {
    .container-custom {
        padding: 0 1.5rem;
    }
}

/* ==========================================================================
   CARDS - Modern Light Style
   ========================================================================== */

.card {
    background: var(--bg-primary);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-xl);
    padding: 1.5rem;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.card:hover {
    border-color: var(--border-medium);
    box-shadow: var(--shadow-lg);
    transform: translateY(-2px);
}

/* Card with subtle gradient border effect */
.card-featured {
    background: var(--bg-primary);
    border-radius: var(--radius-xl);
    padding: 1.5rem;
    position: relative;
    transition: all 0.3s ease;
}

.card-featured::before {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: var(--radius-xl);
    padding: 1px;
    background: linear-gradient(135deg, var(--primary-light), var(--accent-light));
    -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
    mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
    -webkit-mask-composite: xor;
    mask-composite: exclude;
}

.card-featured:hover {
    box-shadow: var(--shadow-xl);
    transform: translateY(-4px);
}

/* Soft colored cards */
.card-teal {
    background: linear-gradient(135deg, var(--primary-bg) 0%, rgba(240, 253, 250, 0.5) 100%);
    border: 1px solid rgba(13, 148, 136, 0.15);
}

.card-indigo {
    background: linear-gradient(135deg, var(--accent-bg) 0%, rgba(238, 242, 255, 0.5) 100%);
    border: 1px solid rgba(99, 102, 241, 0.15);
}

/* Glass card (light version) */
.card-glass {
    background: rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.9);
    border-radius: var(--radius-xl);
    padding: 1.5rem;
    box-shadow: var(--shadow-md);
    transition: all 0.3s ease;
}

.card-glass:hover {
    background: rgba(255, 255, 255, 0.95);
    box-shadow: var(--shadow-lg);
    transform: translateY(-2px);
}

/* ==========================================================================
   BUTTONS
   ========================================================================== */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    font-family: var(--font-primary);
    font-size: 0.9375rem;
    font-weight: 600;
    line-height: 1;
    border-radius: var(--radius-lg);
    border: none;
    cursor: pointer;
    transition: all 0.2s ease;
    white-space: nowrap;
}

.btn:focus-visible {
    outline: 2px solid var(--primary);
    outline-offset: 2px;
}

/* Primary Button */
.btn-primary {
    background: var(--primary);
    color: white;
    box-shadow: 0 1px 3px rgba(13, 148, 136, 0.3);
}

.btn-primary:hover {
    background: var(--primary-dark);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(13, 148, 136, 0.35);
}

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

/* Secondary Button */
.btn-secondary {
    background: var(--bg-primary);
    color: var(--text-primary);
    border: 1px solid var(--border-light);
}

.btn-secondary:hover {
    background: var(--bg-tertiary);
    border-color: var(--border-medium);
}

/* Ghost Button */
.btn-ghost {
    background: transparent;
    color: var(--text-secondary);
    padding: 0.625rem 1rem;
}

.btn-ghost:hover {
    background: var(--bg-tertiary);
    color: var(--text-primary);
}

/* Accent Button */
.btn-accent {
    background: var(--accent);
    color: white;
    box-shadow: 0 1px 3px rgba(99, 102, 241, 0.3);
}

.btn-accent:hover {
    background: var(--accent-light);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(99, 102, 241, 0.35);
}

/* Button Sizes */
.btn-sm {
    padding: 0.5rem 1rem;
    font-size: 0.875rem;
    border-radius: var(--radius-md);
}

.btn-lg {
    padding: 1rem 2rem;
    font-size: 1rem;
    border-radius: var(--radius-xl);
}

/* ==========================================================================
   BADGES & TAGS
   ========================================================================== */

.badge {
    display: inline-flex;
    align-items: center;
    gap: 0.375rem;
    padding: 0.375rem 0.75rem;
    font-size: 0.75rem;
    font-weight: 600;
    line-height: 1;
    border-radius: var(--radius-md);
    white-space: nowrap;
}

.badge-primary {
    background: var(--primary-bg);
    color: var(--primary);
}

.badge-accent {
    background: var(--accent-bg);
    color: var(--accent);
}

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

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

.badge-danger {
    background: rgba(239, 68, 68, 0.1);
    color: var(--danger);
}

.badge-neutral {
    background: var(--bg-tertiary);
    color: var(--text-secondary);
}

/* Tag style */
.tag {
    display: inline-flex;
    align-items: center;
    padding: 0.25rem 0.625rem;
    font-size: 0.75rem;
    font-weight: 500;
    color: var(--text-secondary);
    background: var(--bg-tertiary);
    border-radius: var(--radius-sm);
    transition: all 0.2s ease;
}

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

/* ==========================================================================
   TEXT UTILITIES
   ========================================================================== */

.text-gradient {
    background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.text-gradient-reverse {
    background: linear-gradient(135deg, var(--accent) 0%, var(--primary) 100%);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.text-primary-color { color: var(--primary) !important; }
.text-accent-color { color: var(--accent) !important; }
.text-muted { color: var(--text-muted) !important; }

.text-xs { font-size: 0.75rem; }
.text-sm { font-size: 0.875rem; }
.text-base { font-size: 1rem; }
.text-lg { font-size: 1.125rem; }
.text-xl { font-size: 1.25rem; }
.text-2xl { font-size: 1.5rem; }
.text-3xl { font-size: 1.875rem; }
.text-4xl { font-size: 2.25rem; }

.font-normal { font-weight: 400; }
.font-medium { font-weight: 500; }
.font-semibold { font-weight: 600; }
.font-bold { font-weight: 700; }

.tracking-tight { letter-spacing: -0.025em; }
.tracking-wide { letter-spacing: 0.025em; }
.tracking-wider { letter-spacing: 0.05em; }
.tracking-widest { letter-spacing: 0.1em; }

.uppercase { text-transform: uppercase; }
.capitalize { text-transform: capitalize; }

.line-clamp-1 {
    display: -webkit-box;
    -webkit-line-clamp: 1;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.line-clamp-2 {
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.line-clamp-3 {
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.line-clamp-4 {
    display: -webkit-box;
    -webkit-line-clamp: 4;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

/* ==========================================================================
   DIVIDERS
   ========================================================================== */

.divider {
    height: 1px;
    background: var(--border-light);
    margin: 1.5rem 0;
}

.divider-gradient {
    height: 1px;
    background: linear-gradient(90deg, transparent 0%, var(--border-light) 50%, transparent 100%);
    margin: 1.5rem 0;
}

.divider-dashed {
    height: 0;
    border: none;
    border-top: 1px dashed var(--border-light);
    margin: 1.5rem 0;
}

/* ==========================================================================
   LOADING STATES
   ========================================================================== */

.skeleton {
    background: linear-gradient(
        90deg,
        var(--bg-tertiary) 25%,
        var(--bg-hover) 50%,
        var(--bg-tertiary) 75%
    );
    background-size: 200% 100%;
    animation: skeleton-loading 1.5s ease-in-out infinite;
    border-radius: var(--radius-md);
}

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

.spinner {
    width: 24px;
    height: 24px;
    border: 2px solid var(--border-light);
    border-top-color: var(--primary);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

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

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

/* ==========================================================================
   INPUTS
   ========================================================================== */

.input {
    width: 100%;
    padding: 0.75rem 1rem;
    font-family: var(--font-primary);
    font-size: 0.9375rem;
    color: var(--text-primary);
    background: var(--bg-primary);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-lg);
    transition: all 0.2s ease;
}

.input::placeholder {
    color: var(--text-muted);
}

.input:hover {
    border-color: var(--border-medium);
}

.input:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(13, 148, 136, 0.1);
}

.input-lg {
    padding: 1rem 1.25rem;
    font-size: 1rem;
    border-radius: var(--radius-xl);
}

/* ==========================================================================
   SECTION HEADERS
   ========================================================================== */

.section-header {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.section-header::after {
    content: '';
    flex: 1;
    height: 1px;
    background: linear-gradient(90deg, var(--border-light) 0%, transparent 100%);
}

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

.section-subtitle {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

/* ==========================================================================
   HOVER EFFECTS
   ========================================================================== */

.hover-lift {
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.hover-lift:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.hover-scale {
    transition: transform 0.3s ease;
}

.hover-scale:hover {
    transform: scale(1.02);
}

.hover-brightness {
    transition: filter 0.3s ease;
}

.hover-brightness:hover {
    filter: brightness(1.05);
}

/* ==========================================================================
   SCROLLBAR UTILITIES
   ========================================================================== */

.scrollbar-thin::-webkit-scrollbar {
    width: 6px;
    height: 6px;
}

.scrollbar-thin::-webkit-scrollbar-track {
    background: transparent;
}

.scrollbar-thin::-webkit-scrollbar-thumb {
    background: var(--border-light);
    border-radius: 3px;
}

.scrollbar-thin::-webkit-scrollbar-thumb:hover {
    background: var(--border-medium);
}

.scrollbar-hidden {
    -ms-overflow-style: none;
    scrollbar-width: none;
}

.scrollbar-hidden::-webkit-scrollbar {
    display: none;
}

/* ==========================================================================
   IMAGE UTILITIES
   ========================================================================== */

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

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

.img-rounded {
    border-radius: var(--radius-lg);
}

.img-rounded-xl {
    border-radius: var(--radius-xl);
}

/* ==========================================================================
   ASPECT RATIOS
   ========================================================================== */

.aspect-video {
    aspect-ratio: 16 / 9;
}

.aspect-square {
    aspect-ratio: 1 / 1;
}

.aspect-photo {
    aspect-ratio: 4 / 3;
}

/* ==========================================================================
   Z-INDEX
   ========================================================================== */

.z-0 { z-index: 0; }
.z-10 { z-index: 10; }
.z-20 { z-index: 20; }
.z-30 { z-index: 30; }
.z-40 { z-index: 40; }
.z-50 { z-index: 50; }

/* ==========================================================================
   TRANSITION UTILITIES
   ========================================================================== */

.transition-all {
    transition: all 0.3s ease;
}

.transition-colors {
    transition: color 0.2s ease, background-color 0.2s ease, border-color 0.2s ease;
}

.transition-transform {
    transition: transform 0.3s ease;
}

.transition-opacity {
    transition: opacity 0.3s ease;
}

.duration-150 { transition-duration: 150ms; }
.duration-200 { transition-duration: 200ms; }
.duration-300 { transition-duration: 300ms; }
.duration-500 { transition-duration: 500ms; }

/* ==========================================================================
   FLEX UTILITIES (supplement to Tailwind)
   ========================================================================== */

.flex-center {
    display: flex;
    align-items: center;
    justify-content: center;
}

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

.flex-start {
    display: flex;
    align-items: flex-start;
}

.flex-end {
    display: flex;
    align-items: flex-end;
}