/* ========================================
   COMPONENTS
   Reusable UI components
   ======================================== */

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

.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(253, 251, 247, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--color-border);
    z-index: 1000;
    transform: translateY(-100%);
    transition: transform var(--transition-base);
}

.nav.visible {
    transform: translateY(0);
}

.nav-container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: var(--space-sm) var(--space-md);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-logo {
    font-family: var(--font-display);
    font-size: 20px;
    font-weight: 700;
    color: var(--color-text);
    text-decoration: none;
}

.nav-links {
    display: flex;
    gap: var(--space-lg);
    list-style: none;
}

.nav-link {
    color: var(--color-text-muted);
    text-decoration: none;
    font-weight: 500;
    font-size: 15px;
    transition: color var(--transition-fast);
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--color-primary);
    transition: width var(--transition-base);
}

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

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

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

.btn {
    display: inline-block;
    padding: 14px 32px;
    border-radius: var(--radius-md);
    font-weight: 600;
    font-size: 16px;
    text-decoration: none;
    text-align: center;
    cursor: pointer;
    transition: all var(--transition-base);
    border: none;
    font-family: var(--font-body);
}

.btn-primary {
    background: var(--color-primary);
    color: white;
    box-shadow: var(--shadow-sm);
}

.btn-primary:hover {
    background: var(--color-primary-dark);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
    color: white;
}

.btn-secondary {
    background: var(--color-accent);
    color: white;
    box-shadow: var(--shadow-sm);
}

.btn-secondary:hover {
    background: var(--color-accent-light);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
    color: white;
}

.btn-outline {
    background: transparent;
    color: var(--color-primary);
    border: 2px solid var(--color-primary);
}

.btn-outline:hover {
    background: var(--color-primary);
    color: white;
    transform: translateY(-2px);
}

.btn-large {
    padding: 18px 40px;
    font-size: 18px;
}

.btn-group {
    display: flex;
    gap: var(--space-sm);
    flex-wrap: wrap;
}

/* ========================================
   CARDS
   ======================================== */

.card {
    background: var(--color-card-bg);
    border: 2px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--space-lg);
    transition: all var(--transition-base);
}

.card:hover {
    border-color: var(--color-primary-light);
    box-shadow: var(--shadow-lg);
    transform: translateY(-4px);
}

.card-header {
    margin-bottom: var(--space-md);
}

.card-title {
    font-size: 24px;
    margin-bottom: var(--space-xs);
}

.card-subtitle {
    color: var(--color-text-muted);
    font-size: 15px;
}

.card-content {
    margin-bottom: var(--space-md);
}

.card-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding-top: var(--space-md);
    border-top: 1px solid var(--color-border-light);
}

/* ========================================
   PROJECT CARDS
   ======================================== */

.project-card {
    background: var(--color-card-bg);
    border-radius: var(--radius-xl);
    overflow: hidden;
    border: 2px solid var(--color-border);
    transition: all var(--transition-base);
    position: relative;
}

.project-card:hover {
    border-color: var(--color-primary);
    box-shadow: var(--shadow-xl);
    transform: translateY(-8px);
}

.project-image {
    width: 100%;
    height: 280px;
    background: linear-gradient(135deg, var(--color-accent-light) 0%, var(--color-accent) 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    position: relative;
}

.project-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-slow);
}

.project-card:hover .project-image img {
    transform: scale(1.05);
}

.project-image-placeholder {
    font-size: 64px;
    opacity: 0.3;
}

.project-tag {
    position: absolute;
    top: var(--space-sm);
    right: var(--space-sm);
    background: var(--color-primary);
    color: white;
    padding: 6px 14px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.project-content {
    padding: var(--space-lg);
}

.project-title {
    font-size: 28px;
    margin-bottom: var(--space-xs);
    color: var(--color-text);
}

.project-subtitle {
    color: var(--color-text-muted);
    font-size: 15px;
    margin-bottom: var(--space-md);
    font-weight: 500;
}

.project-description {
    color: var(--color-text-muted);
    line-height: 1.7;
    margin-bottom: var(--space-md);
}

.project-stats {
    display: flex;
    gap: var(--space-lg);
    margin-bottom: var(--space-md);
}

.stat {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.stat-value {
    font-family: var(--font-display);
    font-size: 24px;
    font-weight: 700;
    color: var(--color-primary);
}

.stat-label {
    font-size: 13px;
    color: var(--color-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.project-tags {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-xs);
}

.tag {
    background: var(--color-bg-alt);
    color: var(--color-text-muted);
    padding: 4px 12px;
    border-radius: 4px;
    font-size: 13px;
    font-weight: 500;
}

/* ========================================
   TIMELINE
   ======================================== */

.timeline {
    position: relative;
    padding: var(--space-lg) 0;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 40px;
    top: 0;
    bottom: 0;
    width: 3px;
    background: linear-gradient(to bottom, var(--color-primary), var(--color-accent));
}

.timeline-item {
    position: relative;
    padding-left: 100px;
    margin-bottom: var(--space-xl);
    opacity: 0;
}

.timeline-item.reveal.active {
    animation: slideInRight 0.8s ease forwards;
}

.timeline-marker {
    position: absolute;
    left: 24px;
    top: 8px;
    width: 34px;
    height: 34px;
    background: var(--color-primary);
    border: 4px solid var(--color-bg);
    border-radius: 50%;
    box-shadow: var(--shadow-md);
    z-index: 2;
}

.timeline-date {
    position: absolute;
    left: 100px;
    top: 0;
    font-family: var(--font-display);
    font-size: 18px;
    font-weight: 700;
    color: var(--color-primary);
    width: 180px;
}

.timeline-content {
    background: var(--color-card-bg);
    border: 2px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--space-lg);
    margin-top: 40px;
    transition: all var(--transition-base);
}

.timeline-content:hover {
    border-color: var(--color-primary-light);
    box-shadow: var(--shadow-md);
}

.timeline-title {
    font-size: 24px;
    margin-bottom: var(--space-xs);
}

.timeline-company {
    color: var(--color-accent);
    font-weight: 600;
    margin-bottom: var(--space-sm);
}

.timeline-description {
    color: var(--color-text-muted);
    line-height: 1.7;
}

.timeline-highlights {
    margin-top: var(--space-md);
    padding-left: var(--space-md);
}

.timeline-highlights li {
    color: var(--color-text-muted);
    margin-bottom: var(--space-xs);
    line-height: 1.6;
}

/* ========================================
   BADGES & LABELS
   ======================================== */

.badge {
    display: inline-block;
    padding: 4px 12px;
    border-radius: 4px;
    font-size: 12px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

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

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

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

.badge-outline {
    background: transparent;
    border: 2px solid var(--color-primary);
    color: var(--color-primary);
}

/* ========================================
   GRID LAYOUTS
   ======================================== */

.grid {
    display: grid;
    gap: var(--space-lg);
}

.grid-2 {
    grid-template-columns: repeat(2, 1fr);
}

.grid-3 {
    grid-template-columns: repeat(3, 1fr);
}

.grid-auto {
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
}

/* ========================================
   RESPONSIVE
   ======================================== */

@media (max-width: 1024px) {
    .grid-3 {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .nav-links {
        gap: var(--space-md);
    }

    .nav-link {
        font-size: 14px;
    }

    .btn-group {
        flex-direction: column;
    }

    .btn {
        width: 100%;
    }

    .grid-2,
    .grid-3 {
        grid-template-columns: 1fr;
    }

    .project-stats {
        flex-direction: column;
        gap: var(--space-sm);
    }

    .timeline::before {
        left: 20px;
    }

    .timeline-item {
        padding-left: 60px;
    }

    .timeline-marker {
        left: 4px;
        width: 30px;
        height: 30px;
    }

    .timeline-date {
        position: relative;
        left: 0;
        width: 100%;
        margin-bottom: var(--space-xs);
    }

    .timeline-content {
        margin-top: var(--space-sm);
    }
}

@media (max-width: 480px) {
    .nav-container {
        flex-direction: column;
        gap: var(--space-sm);
    }

    .nav-links {
        gap: var(--space-sm);
    }

    .project-image {
        height: 200px;
    }

    .project-content {
        padding: var(--space-md);
    }
}