/* Buttons */
.btn {
    display: inline-block;
    padding: 12px 32px;
    border-radius: var(--radius-full);
    font-weight: 600;
    font-size: 1rem;
    cursor: pointer;
    transition: var(--transition-normal);
    text-align: center;
    border: 1px solid transparent;
}

.btn-primary {
    background: #2563eb;
    /* Solid Royal Blue */
    color: #ffffff;
    box-shadow: 0 4px 6px rgba(37, 99, 235, 0.3);
    border: 1px solid #2563eb;
}

.btn-primary:hover {
    background: #1d4ed8;
    /* Darker Blue on hover */
    transform: translateY(-2px);
    box-shadow: 0 6px 12px rgba(37, 99, 235, 0.4);
    border-color: #1d4ed8;
}

.btn-outline {
    background: transparent;
    border: 1px solid var(--primary-color);
    color: var(--primary-color);
}

.btn-outline:hover {
    background: rgba(0, 243, 255, 0.1);
    transform: translateY(-2px);
}

/* Cards */
.card {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
    transition: var(--transition-normal);
    backdrop-filter: blur(10px);
    position: relative;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    height: 100%;
}

.card:hover {
    border-color: var(--primary-color);
    transform: translateY(-5px);
    box-shadow: var(--shadow-md);
}

.card::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.05), transparent);
    transition: 0.5s;
}

.card:hover::before {
    left: 100%;
}

/* Section Titles */
.section-title {
    font-size: 2.5rem;
    margin-bottom: var(--spacing-lg);
    text-align: center;
    background: var(--gradient-text);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    position: relative;
    display: table;
    /* Keeps it centered but allows width to fit content */
    margin-left: auto;
    margin-right: auto;
    z-index: 100;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 4px;
    background: var(--gradient-primary);
    border-radius: var(--radius-full);
}

/* Language Toggle */
.lang-toggle {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-left: var(--spacing-sm);
}

.lang-btn {
    background: none;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    font-weight: 600;
    font-size: 0.9rem;
    transition: var(--transition-fast);
}

.lang-btn:hover {
    color: var(--primary-color);
}

.lang-btn.active {
    color: var(--primary-color);
    text-shadow: 0 0 10px rgba(0, 243, 255, 0.5);
}

/* Timeline */
.timeline {
    position: relative;
    max-width: 800px;
    margin: 0 auto;
}

.timeline::after {
    content: '';
    position: absolute;
    width: 2px;
    background: var(--glass-border);
    top: 0;
    bottom: 0;
    left: 50%;
    margin-left: -1px;
}

.timeline-item {
    padding: 10px 40px;
    position: relative;
    background-color: inherit;
    width: 50%;
}

.timeline-item::after {
    content: '';
    position: absolute;
    width: 16px;
    height: 16px;
    right: -8px;
    background-color: var(--bg-color);
    border: 2px solid var(--primary-color);
    top: 15px;
    border-radius: 50%;
    z-index: 1;
    transition: var(--transition-fast);
}

.timeline-item:hover::after {
    background-color: var(--primary-color);
    box-shadow: 0 0 10px var(--primary-color);
}

.left {
    left: 0;
}

.right {
    left: 50%;
}

.left::before {
    content: " ";
    height: 0;
    position: absolute;
    top: 22px;
    width: 0;
    z-index: 1;
    right: 30px;
    border: medium solid var(--glass-border);
    border-width: 10px 0 10px 10px;
    border-color: transparent transparent transparent var(--glass-border);
}

.right::before {
    content: " ";
    height: 0;
    position: absolute;
    top: 22px;
    width: 0;
    z-index: 1;
    left: 30px;
    border: medium solid var(--glass-border);
    border-width: 10px 10px 10px 0;
    border-color: transparent var(--glass-border) transparent transparent;
}

.right::after {
    left: -8px;
}

.timeline-content {
    padding: 20px 30px;
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    position: relative;
    border-radius: var(--radius-sm);
    transition: var(--transition-normal);
}

.timeline-content:hover {
    border-color: var(--primary-color);
    transform: scale(1.02);
}

/* Skills Tags */
.skill-tag {
    display: inline-block;
    padding: 8px 16px;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-full);
    font-size: 0.9rem;
    margin-right: 8px;
    margin-bottom: 8px;
    transition: var(--transition-fast);
}

.skill-tag:hover {
    background: rgba(0, 243, 255, 0.1);
    border-color: var(--primary-color);
    color: var(--primary-color);
    transform: translateY(-2px);
}

/* Responsive Timeline */
@media (max-width: 768px) {
    .timeline::after {
        left: 31px;
    }

    .timeline-item {
        width: 100%;
        padding-left: 70px;
        padding-right: 25px;
    }

    .timeline-item::before {
        left: 60px;
        border: medium solid white;
        border-width: 10px 10px 10px 0;
        border-color: transparent white transparent transparent;
    }

    .left::after,
    .right::after {
        left: 23px;
    }

    .right {
        left: 0%;
    }
}