/* =============================================
   SWITCHCURRENCY THEME — LAYOUT
   Header, Footer, Hero, Sections, Container
   Soft-Tech Light Theme
   ============================================= */

/* ═══════════════════════════════════════════
   CONTAINER
   ═══════════════════════════════════════════ */

.container-custom {
    width: 100%;
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--space-6);
}

@media (max-width: 576px) {
    .container-custom { padding: 0 var(--space-4); }
}

@media (max-width: 768px) {
    .header-inner { padding: 0 var(--space-4); }
    .site-logo-text { font-size: var(--font-size-base); }
}

/* ═══════════════════════════════════════════
   HEADER / NAVBAR
   ═══════════════════════════════════════════ */

.site-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--header-height);
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-default);
    z-index: var(--z-fixed);
    transition: background var(--transition-normal);
}

.site-header.scrolled {
    background: rgba(255, 255, 255, 0.98);
    box-shadow: var(--shadow-sm);
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 100%;
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--space-6);
}

/* Logo */
.site-logo {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    text-decoration: none;
}

.site-logo-icon {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-sm);
    background: var(--color-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-on-primary);
}

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

.site-logo-text span {
    color: var(--color-primary);
}

/* Navigation */
.header-nav {
    display: flex;
    align-items: center;
    gap: var(--space-8);
}

.header-nav-links {
    display: flex;
    align-items: center;
    gap: var(--space-6);
}

.nav-link {
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    color: var(--text-secondary);
    text-decoration: none;
    transition: color var(--transition-fast);
    position: relative;
}

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

.nav-link:hover { color: var(--color-primary); }
.nav-link:hover::after,
.nav-link.active::after { width: 100%; }
.nav-link.active { color: var(--color-primary); }

.header-nav-actions {
    display: flex;
    align-items: center;
    gap: var(--space-3);
}

/* Mobile menu toggle */
.mobile-menu-toggle {
    display: none;
    width: 40px;
    height: 40px;
    background: none;
    border: none;
    color: var(--text-primary);
    cursor: pointer;
    padding: 8px;
}

.mobile-menu-toggle span {
    display: block;
    width: 22px;
    height: 2px;
    background: var(--text-primary);
    margin: 5px auto;
    transition: all var(--transition-normal);
    border-radius: 2px;
}

.mobile-menu-toggle.active span:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
.mobile-menu-toggle.active span:nth-child(2) { opacity: 0; }
.mobile-menu-toggle.active span:nth-child(3) { transform: rotate(-45deg) translate(5px, -5px); }

/* Mobile nav */
.mobile-nav {
    position: fixed;
    top: var(--header-height);
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--bg-surface);
    z-index: calc(var(--z-fixed) - 1);
    padding: var(--space-8) var(--space-6);
    display: flex;
    flex-direction: column;
    gap: var(--space-4);
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
    visibility: hidden;
    opacity: 0;
    transform: translateY(-8px);
    transition: opacity 0.25s ease, visibility 0.25s ease, transform 0.25s ease;
    pointer-events: none;
}

.mobile-nav.open {
    visibility: visible;
    opacity: 1;
    transform: translateY(0);
    pointer-events: auto;
}

/* Mobile nav backdrop overlay */
.mobile-nav-backdrop {
    position: fixed;
    top: var(--header-height);
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.3);
    z-index: calc(var(--z-fixed) - 2);
    visibility: hidden;
    opacity: 0;
    transition: opacity 0.25s ease, visibility 0.25s ease;
    pointer-events: none;
}

.mobile-nav-backdrop.open {
    visibility: visible;
    opacity: 1;
    pointer-events: auto;
}

.mobile-nav .nav-link {
    font-size: var(--font-size-lg);
    padding: var(--space-3) 0;
    border-bottom: 1px solid var(--border-default);
}

.mobile-nav .nav-link::after { display: none; }

/* Prevent body scroll when mobile nav is open */
body.mobile-nav-open {
    overflow: hidden;
    position: fixed;
    width: 100%;
}

@media (max-width: 991px) {
    .header-nav-links,
    .header-nav-actions { display: none; }
    .mobile-menu-toggle { display: block; }
}

/* ═══════════════════════════════════════════
   HERO — styles in landing.css
   ═══════════════════════════════════════════ */

/* ═══════════════════════════════════════════
   SECTIONS
   ═══════════════════════════════════════════ */

.section {
    padding: var(--space-16) 0;
    position: relative;
}

.section-sm { padding: var(--space-10) 0; }

@media (max-width: 768px) {
    .section { padding: var(--space-10) 0; }
    .section-sm { padding: var(--space-6) 0; }
    .section-header { margin-bottom: var(--space-8); }
    .section-title { font-size: var(--font-size-xl); }
    .section-description { font-size: var(--font-size-base); }
}

.section-header {
    text-align: center;
    max-width: 640px;
    margin: 0 auto var(--space-12);
}

.section-badge { margin-bottom: var(--space-4); }

.section-title {
    font-size: var(--font-size-3xl);
    font-weight: var(--font-weight-bold);
    color: var(--text-primary);
    margin-bottom: var(--space-4);
}

.section-description {
    font-size: var(--font-size-lg);
    color: var(--text-secondary);
    max-width: 100%;
    margin: 0 auto;
}

/* ═══════════════════════════════════════════
   FOOTER
   ═══════════════════════════════════════════ */

.site-footer {
    background: var(--bg-surface);
    border-top: 1px solid var(--border-default);
    padding: var(--space-12) 0 var(--space-8);
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: var(--space-10);
    margin-bottom: var(--space-12);
}

@media (max-width: 991px) { .footer-grid { grid-template-columns: 1fr 1fr; gap: var(--space-8); } }
@media (max-width: 768px) {
    .footer-grid { grid-template-columns: 1fr; gap: var(--space-6); }
    .footer-brand { max-width: 100%; }
}
@media (max-width: 576px) {
    .footer-bottom { flex-direction: column; gap: var(--space-4); text-align: center; }
    .site-footer { padding: var(--space-8) 0 var(--space-6); }
    .footer-heading { margin-bottom: var(--space-3); }
}

.footer-brand { max-width: 300px; }
.footer-brand .site-logo { margin-bottom: var(--space-4); }

.footer-brand-text {
    font-size: var(--font-size-sm);
    color: var(--text-muted);
    line-height: var(--line-height-relaxed);
}

.footer-heading {
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-bold);
    color: var(--text-primary);
    margin-bottom: var(--space-5);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.footer-links {
    display: flex;
    flex-direction: column;
    gap: var(--space-3);
}

.footer-link {
    font-size: var(--font-size-sm);
    color: var(--text-muted);
    transition: color var(--transition-fast);
}

.footer-link:hover { color: var(--color-primary); }

.footer-bottom {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding-top: var(--space-8);
    border-top: 1px solid var(--border-default);
}

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

.footer-social {
    display: flex;
    gap: var(--space-3);
}

.footer-social-link {
    width: 36px;
    height: 36px;
    border-radius: var(--radius-full);
    background: var(--bg-elevated);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-muted);
    transition: all var(--transition-fast);
}

.footer-social-link:hover {
    background: var(--color-primary);
    color: var(--text-on-primary);
}

@media (max-width: 576px) {
    .footer-bottom { flex-direction: column; gap: var(--space-4); text-align: center; }
}