/* Component Styles */

/* ========================================
   Navigation
   ======================================== */

.main-nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(15, 20, 25, 0.8);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--color-border);
    transform: translateY(-100%);
    transition: transform var(--transition-base);
}

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

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

.nav-logo {
    font-size: var(--text-lg);
    font-weight: var(--weight-bold);
    color: var(--color-text-primary);
}

.logo-bracket {
    color: var(--color-accent-blue);
}

.nav-links {
    display: flex;
    gap: var(--space-xl);
}

.nav-links a {
    color: var(--color-text-secondary);
    font-size: var(--text-sm);
    font-weight: var(--weight-medium);
    transition: color var(--transition-fast);
    position: relative;
}

.nav-links a:hover,
.nav-links a.active {
    color: var(--color-accent-blue);
}

.nav-links a.active::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--color-accent-blue);
}

@media (max-width: 640px) {
    .nav-links {
        gap: var(--space-md);
    }
}

/* ========================================
   Hero Section
   ======================================== */

.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-4xl) var(--space-lg);
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(
        ellipse at top,
        rgba(59, 130, 246, 0.1),
        transparent 50%
    );
    pointer-events: none;
}

.hero-content {
    max-width: 800px;
    text-align: center;
    position: relative;
    z-index: 1;
}

.hero-name {
    font-size: var(--text-4xl);
    font-weight: var(--weight-bold);
    margin-bottom: var(--space-md);
    background: linear-gradient(
        135deg,
        var(--color-accent-blue),
        var(--color-accent-cyan)
    );
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-tagline {
    font-size: var(--text-xl);
    color: var(--color-text-secondary);
    margin-bottom: var(--space-xl);
    font-weight: var(--weight-medium);
}

.hero-description {
    font-size: var(--text-lg);
    color: var(--color-text-secondary);
    margin-bottom: var(--space-2xl);
    line-height: 1.7;
}

.hero-cta {
    display: flex;
    gap: var(--space-md);
    justify-content: center;
    margin-bottom: var(--space-xl);
}

.hero-contact {
    display: flex;
    gap: var(--space-md);
    justify-content: center;
    align-items: center;
    font-size: var(--text-sm);
    color: var(--color-text-tertiary);
}

.hero-contact a {
    color: var(--color-text-secondary);
    transition: color var(--transition-fast);
}

.hero-contact a:hover {
    color: var(--color-accent-blue);
}

.hero-contact .separator {
    color: var(--color-border);
}

@media (max-width: 768px) {
    .hero {
        min-height: auto;
        padding: var(--space-3xl) var(--space-md);
    }

    .hero-name {
        font-size: var(--text-3xl);
    }

    .hero-tagline {
        font-size: var(--text-lg);
    }

    .hero-description {
        font-size: var(--text-base);
    }

    .hero-cta {
        flex-direction: column;
        align-items: stretch;
    }

    .hero-contact {
        flex-direction: column;
        gap: var(--space-xs);
    }

    .hero-contact .separator {
        display: none;
    }
}

/* ========================================
   Buttons
   ======================================== */

.btn-primary,
.btn-secondary {
    display: inline-block;
    padding: var(--space-md) var(--space-xl);
    border-radius: var(--radius-md);
    font-size: var(--text-base);
    font-weight: var(--weight-semibold);
    transition: all var(--transition-base);
    text-align: center;
}

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

.btn-primary:hover {
    background: #4f96ff;
    box-shadow: 0 0 30px rgba(59, 130, 246, 0.3);
    transform: translateY(-2px);
}

.btn-secondary {
    background: transparent;
    color: var(--color-accent-blue);
    border: 2px solid var(--color-accent-blue);
}

.btn-secondary:hover {
    background: rgba(59, 130, 246, 0.1);
    box-shadow: var(--shadow-glow-blue);
}

/* ========================================
   Timeline
   ======================================== */

.timeline-item {
    position: relative;
    padding-left: var(--space-2xl);
    margin-bottom: var(--space-3xl);
}

.timeline-item:last-child {
    margin-bottom: 0;
}

.timeline-marker {
    position: absolute;
    left: -6px;
    top: 8px;
    width: 14px;
    height: 14px;
    background: var(--color-accent-blue);
    border-radius: 50%;
    border: 3px solid var(--color-bg-primary);
    box-shadow: 0 0 0 4px var(--color-bg-secondary);
}

.timeline-content {
    background: var(--color-bg-secondary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--space-xl);
    transition: border-color var(--transition-base);
}

.timeline-content:hover {
    border-color: var(--color-border-hover);
}

.timeline-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: var(--space-lg);
    margin-bottom: var(--space-md);
    cursor: pointer;
}

.timeline-header[role="button"]:hover .timeline-company {
    color: var(--color-accent-blue);
}

.timeline-title-group {
    flex: 1;
}

.timeline-company {
    font-size: var(--text-xl);
    font-weight: var(--weight-bold);
    color: var(--color-text-primary);
    margin-bottom: var(--space-xs);
    transition: color var(--transition-fast);
}

.timeline-role {
    font-size: var(--text-base);
    color: var(--color-accent-cyan);
    font-weight: var(--weight-medium);
}

.timeline-meta {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    font-size: var(--text-sm);
    color: var(--color-text-tertiary);
    flex-shrink: 0;
}

.timeline-date {
    white-space: nowrap;
}

.timeline-location {
    white-space: nowrap;
}

.expand-toggle {
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-sm);
    background: var(--color-bg-tertiary);
    color: var(--color-accent-blue);
    font-size: var(--text-lg);
    transition: all var(--transition-fast);
}

.expand-toggle:hover {
    background: var(--color-border-hover);
}

.expand-toggle .toggle-icon {
    transition: transform var(--transition-base);
}

.timeline-item[data-expanded="true"] .toggle-icon {
    transform: rotate(45deg);
}

.timeline-summary {
    color: var(--color-text-secondary);
    line-height: 1.7;
}

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

.timeline-description p {
    margin-bottom: var(--space-md);
}

.timeline-description p:last-child {
    margin-bottom: 0;
}

.timeline-details {
    max-height: 0;
    overflow: hidden;
    transition: max-height var(--transition-slow);
}

.timeline-item[data-expanded="true"] .timeline-details {
    max-height: 2000px;
    margin-top: var(--space-lg);
}

.project-list {
    display: flex;
    flex-direction: column;
    gap: var(--space-lg);
}

.project-item {
    padding-left: var(--space-md);
    border-left: 3px solid var(--color-accent-blue);
}

.project-title {
    font-size: var(--text-lg);
    font-weight: var(--weight-semibold);
    color: var(--color-text-primary);
    margin-bottom: var(--space-xs);
}

.project-description {
    color: var(--color-text-secondary);
    line-height: 1.7;
}

@media (max-width: 768px) {
    .timeline-item {
        padding-left: 0;
    }

    .timeline-marker {
        display: none;
    }

    .timeline-header {
        flex-direction: column;
        gap: var(--space-md);
    }

    .timeline-meta {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--space-xs);
        width: 100%;
    }

    .expand-toggle {
        position: absolute;
        top: var(--space-xl);
        right: var(--space-xl);
    }
}

/* ========================================
   Skills Section
   ======================================== */

.skill-category {
    background: var(--color-bg-secondary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--space-xl);
}

.category-title {
    font-size: var(--text-lg);
    font-weight: var(--weight-semibold);
    color: var(--color-text-primary);
    margin-bottom: var(--space-lg);
}

.skill-tags {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-sm);
}

.skill-tag {
    padding: var(--space-sm) var(--space-md);
    background: var(--color-bg-tertiary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    font-size: var(--text-sm);
    color: var(--color-text-secondary);
    transition: all var(--transition-fast);
}

.skill-tag:hover {
    border-color: var(--color-accent-blue);
    color: var(--color-accent-blue);
    box-shadow: var(--shadow-glow-blue);
}

/* ========================================
   Stats Cards
   ======================================== */

.stat-card {
    background: var(--color-bg-secondary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--space-xl);
    text-align: center;
    transition: all var(--transition-base);
}

.stat-card:hover {
    border-color: var(--color-accent-blue);
    box-shadow: var(--shadow-glow-blue);
    transform: translateY(-4px);
}

.stat-value {
    font-size: var(--text-3xl);
    font-weight: var(--weight-bold);
    color: var(--color-accent-blue);
    margin-bottom: var(--space-xs);
}

.stat-label {
    font-size: var(--text-sm);
    color: var(--color-text-tertiary);
    font-weight: var(--weight-medium);
}

/* ========================================
   Footer
   ======================================== */

.main-footer {
    background: var(--color-bg-secondary);
    border-top: 1px solid var(--color-border);
    padding: var(--space-3xl) 0;
    margin-top: var(--space-4xl);
}

.footer-content {
    text-align: center;
}

.footer-text {
    font-size: var(--text-sm);
    color: var(--color-text-tertiary);
    margin-bottom: var(--space-md);
}

.footer-contact {
    display: flex;
    gap: var(--space-md);
    justify-content: center;
    align-items: center;
    font-size: var(--text-sm);
    color: var(--color-text-tertiary);
    margin-bottom: var(--space-md);
}

.footer-contact a {
    color: var(--color-text-secondary);
    transition: color var(--transition-fast);
}

.footer-contact a:hover {
    color: var(--color-accent-blue);
}

.footer-contact .separator {
    color: var(--color-border);
}

.footer-copyright {
    font-size: var(--text-xs);
    color: var(--color-text-tertiary);
}

@media (max-width: 640px) {
    .footer-contact {
        flex-direction: column;
        gap: var(--space-xs);
    }

    .footer-contact .separator {
        display: none;
    }
}