/* ================================================
   EXPERIENCES TIMELINE STYLES
   ================================================ */

/* Section Header */
.section-header-experiences {
    text-align: center;
    margin-bottom: var(--space-32);
}

.section-header-experiences h2 {
    font-size: var(--font-size-3xl);
    color: var(--color-text);
    font-weight: var(--font-weight-bold);
    margin-bottom: var(--space-8);
    position: relative;
    display: inline-block;
}

.section-header-experiences h2::after {
    content: '';
    position: absolute;
    bottom: -8px;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 3px;
    background: linear-gradient(90deg, var(--color-primary), var(--color-primary-active));
    border-radius: var(--radius-full);
}

/* Timeline Container */
.timeline-section {
    padding: var(--space-32) 0;
}

.formations-section {
    background-color: var(--color-surface);
}

.timeline-container {
    position: relative;
    padding: var(--space-32) 0;
}

.timeline {
    position: relative;
    max-width: var(--container-lg);
    margin: 0 auto;
}

/* Centre vertical line */
.timeline::before {
    content: '';
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    width: 3px;
    height: 100%;
    background: linear-gradient(180deg, var(--color-primary), var(--color-primary-active));
}

/* Timeline items */
.timeline-item {
    margin-bottom: var(--space-32);
    position: relative;
}

.timeline-item:nth-child(odd) .timeline-content {
    margin-left: 0;
    margin-right: 52%;
    text-align: right;
    padding-right: var(--space-32);
}

.timeline-item:nth-child(even) .timeline-content {
    margin-left: 52%;
    margin-right: 0;
    text-align: left;
    padding-left: var(--space-32);
}

/* Timeline dot */
.timeline-dot {
    position: absolute;
    left: 50%;
    top: 0;
    transform: translateX(-50%);
    width: 16px;
    height: 16px;
    background: var(--color-primary);
    border: 4px solid var(--color-surface);
    border-radius: var(--radius-full);
    z-index: 10;
    box-shadow: 0 0 0 3px var(--color-primary);
}

/* Content card */
.timeline-content {
    background: var(--color-surface);
    padding: var(--space-24);
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-card-border);
    box-shadow: var(--shadow-sm);
    transition: all var(--duration-normal) var(--ease-standard);
}

.timeline-content:hover {
    border-color: var(--color-primary);
    box-shadow: var(--shadow-lg);
    transform: translateY(-3px);
}

.timeline-date {
    font-weight: var(--font-weight-semibold);
    color: var(--color-primary);
    font-size: var(--font-size-sm);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: var(--space-8);
}

.timeline-title {
    font-size: var(--font-size-xl);
    font-weight: var(--font-weight-bold);
    color: var(--color-text);
    margin-bottom: var(--space-6);
    line-height: var(--line-height-tight);
}

.timeline-subtitle {
    font-size: var(--font-size-base);
    color: var(--color-primary);
    font-weight: var(--font-weight-medium);
    margin-bottom: var(--space-12);
}

.timeline-description {
    color: var(--color-text-secondary);
    font-size: var(--font-size-base);
    line-height: var(--line-height-normal);
    margin-bottom: 0;
}

.timeline-list {
    list-style: none;
    padding: 0;
    margin: 0;
    color: var(--color-text-secondary);
    font-size: var(--font-size-base);
}

.timeline-list li {
    margin-bottom: var(--space-8);
    padding-left: var(--space-16);
    position: relative;
    line-height: var(--line-height-normal);
}

.timeline-list li:before {
    content: "•";
    position: absolute;
    left: 0;
    color: var(--color-primary);
    font-weight: bold;
}

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

/* Skills Section */
.skills-section {
    padding: var(--space-32) 0;
    background-color: var(--color-background);
}

.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--space-32);
    max-width: var(--container-lg);
    margin: 0 auto;
}

.skills-category h3 {
    color: var(--color-primary);
    margin-bottom: var(--space-16);
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-semibold);
}

.skills-category ul {
    list-style: none;
    padding: 0;
    color: var(--color-text-secondary);
}

.skills-category li {
    margin-bottom: var(--space-12);
    font-size: var(--font-size-base);
    line-height: var(--line-height-normal);
    padding-left: var(--space-16);
    position: relative;
}

.skills-category li:before {
    content: "✓";
    position: absolute;
    left: 0;
    color: var(--color-primary);
    font-weight: bold;
}

.skills-category li:last-child {
    margin-bottom: 0;
}

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

/* Tablet and smaller desktop - 768px breakpoint */
@media (max-width: 768px) {
    .timeline::before {
        left: var(--space-20);
    }

    .timeline-item:nth-child(odd) .timeline-content,
    .timeline-item:nth-child(even) .timeline-content {
        margin-left: 60px;
        margin-right: 0;
        text-align: left;
        padding-left: var(--space-16);
        padding-right: var(--space-16);
    }

    .timeline-dot {
        left: var(--space-20);
    }

    .timeline-content {
        padding: var(--space-16);
    }

    .timeline-title {
        font-size: var(--font-size-lg);
    }

    .skills-grid {
        grid-template-columns: 1fr;
    }
}

/* Mobile portrait - 480px breakpoint */
@media (max-width: 480px) {
    .timeline-container {
        padding: var(--space-24) 0;
    }

    .timeline-item {
        margin-bottom: var(--space-24);
    }

    .timeline-item:nth-child(odd) .timeline-content,
    .timeline-item:nth-child(even) .timeline-content {
        margin-left: 52px;
        padding-left: var(--space-12);
        padding-right: var(--space-12);
    }

    .timeline-dot {
        width: 12px;
        height: 12px;
        border-width: 3px;
    }

    .timeline-title {
        font-size: var(--font-size-lg);
    }

    .timeline-subtitle {
        font-size: var(--font-size-sm);
    }

    .timeline-description {
        font-size: var(--font-size-sm);
    }

    .timeline-list li {
        font-size: var(--font-size-sm);
    }

    .section-header-experiences h2 {
        font-size: var(--font-size-2xl);
    }
}

/* Dark mode support */
@media (prefers-color-scheme: dark) {
    .formations-section {
        background-color: var(--color-charcoal-800);
    }

    .skills-section {
        background-color: var(--color-charcoal-700);
    }
}

[data-color-scheme="dark"] .formations-section {
    background-color: var(--color-charcoal-800);
}

[data-color-scheme="dark"] .skills-section {
    background-color: var(--color-charcoal-700);
}