/* ============================================================
   BUTTONS & SECTION TITLES
   ============================================================ */

/* Primary button — gradient with shadow */
.btn {
    display: inline-block;
    padding: 0.85rem 2rem;
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
    color: white;
    border-radius: var(--radius-lg);
    font-family: var(--font-body);
    font-weight: var(--font-weight-semibold);
    font-size: 0.85rem;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    transition: all var(--transition-normal);
    border: none;
    cursor: pointer;
    box-shadow: var(--shadow-primary);
    position: relative;
    overflow: hidden;
}

/* Hover — lifts and deepens shadow */
.btn:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-xl);
}

/* Click — slight press effect */
.btn:active { transform: translateY(-1px) scale(0.98); }

/* Secondary button — uses accent color */
.btn-secondary {
    background: linear-gradient(135deg, var(--color-accent) 0%, var(--color-accent-light) 100%);
    color: white;
    box-shadow: 0 6px 20px rgba(59, 154, 225, 0.30);
}
.btn-secondary:hover {
    box-shadow: 0 12px 32px rgba(59, 154, 225, 0.40);
    transform: translateY(-3px);
}

/* Section title — centered with decorative underline */
.section-title {
    text-align: center;
    font-size: clamp(1.8rem, 4vw, 3.5rem);
    color: var(--color-primary);
    margin-bottom: var(--space-8);
    position: relative;
    display: table;
    margin-left: auto;
    margin-right: auto;
    font-weight: var(--font-weight-light);
    letter-spacing: -0.02em;
}

/* Dark mode section title */
[data-theme="dark"] .section-title { color: var(--color-secondary); }

/* Decorative line below the title */
.section-title::after {
    content: '';
    display: block;
    width: 60px;
    height: 3px;
    background: linear-gradient(90deg, var(--color-secondary), var(--color-accent));
    margin: var(--space-4) auto 0;
    border-radius: var(--radius-full);
}