/* v2 Layout - Header, Navigation, Footer, Mobile Menu */

/* ============================================
   Header
   ============================================ */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: var(--header-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border);
    box-shadow: var(--shadow-sm);
    z-index: var(--z-fixed);
    height: var(--header-height);
}

.header .container {
    height: 100%;
}

.header-content {
    height: 100%;
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* ============================================
   Navigation Group
   ============================================ */
.nav-group {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 2rem;
    height: 100%;
    width: 100%;
}

/* ============================================
   Logo
   ============================================ */
.logo {
    display: flex;
    align-items: center;
    flex-shrink: 0;
}

.logo a {
    display: flex;
    align-items: center;
    text-decoration: none;
    font-weight: var(--font-weight-bold);
    font-size: 1.5rem;
    color: var(--brand-light);
    transition: opacity var(--transition-smooth);
}

.logo a:hover {
    opacity: 0.8;
}

.logo img {
    height: 1.875rem; /* 30px */
    width: auto;
    transition: opacity var(--transition-smooth);
    object-fit: contain;
    /* Invert dark logo to light for dark theme */
    filter: brightness(0) invert(1);
}

/* Hide broken images */
.logo img:not([src]),
.logo img[src=""] {
    display: none;
}

/* ============================================
   Desktop Navigation
   ============================================ */
.nav {
    display: flex;
    align-items: center;
    gap: 1.5rem;
    height: 100%;
}

.nav a {
    position: relative;
    color: var(--text-muted);
    text-decoration: none;
    font-family: var(--font-body);
    font-weight: var(--font-weight-medium);
    font-size: 0.9375rem;
    padding: 0.75rem 0.875rem;
    border-radius: var(--radius);
    transition: all var(--transition-smooth);
    display: flex;
    align-items: center;
    height: fit-content;
    white-space: nowrap;
}

.nav a:hover,
.nav a:focus-visible {
    color: var(--text);
    background: var(--brand-dim);
    transform: translateY(-1px);
}

.nav a.active {
    color: var(--brand-light);
}

.nav a::after {
    content: '';
    position: absolute;
    bottom: 0.5rem;
    left: 0.875rem;
    right: 0.875rem;
    height: 2px;
    background: linear-gradient(90deg, var(--brand), var(--brand-bright));
    transform: scaleX(0);
    transition: transform var(--transition-smooth);
    border-radius: 1px;
}

.nav a:hover::after,
.nav a.active::after {
    transform: scaleX(1);
}

/* Compensate padding on last link for symmetry */
.nav {
    margin-right: -0.875rem;
}

/* ============================================
   Nav Actions (theme toggle + hamburger group)
   ============================================ */
.nav-actions {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    flex-shrink: 0;
}

/* ============================================
   Theme Toggle Button
   ============================================ */
.theme-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    background: none;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    color: var(--text-muted);
    cursor: pointer;
    transition: all var(--transition-smooth);
    flex-shrink: 0;
}
.theme-toggle:hover,
.theme-toggle:focus-visible {
    color: var(--text);
    border-color: var(--border-hover);
    background: var(--brand-dim);
}

/* ============================================
   Mobile Menu Button
   ============================================ */
.mobile-menu-btn {
    display: none;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    width: 44px;
    height: 44px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
    border-radius: var(--radius);
    transition: background-color var(--transition-smooth);
}

.mobile-menu-btn:hover,
.mobile-menu-btn:focus-visible {
    background: rgba(255, 255, 255, 0.08);
}

.hamburger-line {
    display: block;
    height: 2px;
    width: 20px;
    background: var(--text);
    border-radius: 1px;
    margin: 2px 0;
    transition: all var(--transition-smooth);
}

/* ============================================
   Mobile Navigation
   ============================================ */
.mobile-nav {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--mobile-nav-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-top: 1px solid var(--border);
    box-shadow: var(--shadow-lg);
    z-index: 40;
    opacity: 0;
    transform: translateY(-10px);
    transition: all var(--transition-smooth);
    padding: 1rem 0;
    flex-direction: column;
    gap: 0.25rem;
}

.mobile-nav.active {
    display: flex;
    opacity: 1;
    transform: translateY(0);
}

.mobile-nav a {
    color: var(--text-muted);
    text-decoration: none;
    font-family: var(--font-body);
    font-weight: var(--font-weight-medium);
    font-size: 1.125rem;
    transition: all var(--transition-smooth);
    padding: 0.875rem 1rem;
    margin: 0 0.5rem;
    border-radius: var(--radius);
}

.mobile-nav a:hover,
.mobile-nav a:focus-visible {
    color: var(--text);
    background: var(--brand-dim);
    transform: translateX(0.25rem);
}

.mobile-nav a.active {
    color: var(--brand-light);
}

/* ============================================
   Footer
   ============================================ */
.footer {
    background: linear-gradient(180deg, var(--bg-raised) 0%, var(--bg) 100%);
    border-top: 1px solid var(--border);
    padding: 4rem 0 2rem;
    position: relative;
}

.footer::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--border-hover), transparent);
}

.footer-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
    margin-bottom: 3rem;
    align-items: center;
}

.footer-logo {
    display: flex;
    align-items: flex-start;
    justify-content: center;
}

.footer-logo img {
    height: 2.5rem;
    width: auto;
    object-fit: contain;
    /* Invert dark logo to light for dark theme */
    filter: brightness(0) invert(1);
}

.footer-section {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.footer-contact-block {
    text-align: left;
}

.footer-section h3 {
    font-family: var(--font-display);
    font-weight: var(--font-weight-medium);
    margin-bottom: 1rem;
    color: var(--text);
    font-size: 1rem;
}

.footer-section a {
    color: var(--text-muted);
    text-decoration: none;
    font-size: 0.875rem;
    transition: color var(--transition-smooth);
}

.footer-section a:hover {
    color: var(--brand-light);
}

.footer-bottom {
    border-top: 1px solid var(--border);
    padding-top: 2rem;
    text-align: center;
}

.footer-bottom p {
    font-size: 0.875rem;
    color: var(--text-faint);
}

/* ============================================
   Responsive - Desktop Large
   ============================================ */
@media (min-width: 1200px) {
    .nav-group {
        gap: 3rem;
    }

    .nav {
        gap: 2rem;
    }

    .nav a {
        font-size: 1.0625rem;
        padding: 0.75rem 1.125rem;
    }
}

/* ============================================
   Responsive - Desktop
   ============================================ */
@media (min-width: 1024px) {
    .nav-group {
        gap: 2.5rem;
    }

    .nav {
        display: flex;
        gap: 1.75rem;
    }

    .header {
        height: var(--header-height-large);
    }

    .nav a {
        font-size: 1rem;
        padding: 0.75rem 1rem;
    }
}

/* ============================================
   Responsive - Tablet
   ============================================ */
@media (min-width: 768px) {
    .header {
        height: 4.25rem;
    }
}

/* ============================================
   Responsive - Mobile (< 1024px)
   ============================================ */
@media (max-width: 1023px) {
    .header-content {
        justify-content: center;
        position: relative;
    }

    .nav-group {
        flex-direction: column;
        gap: 0;
    }

    .nav {
        display: none;
    }

    .mobile-menu {
        display: flex;
    }

    .header {
        height: var(--header-height-mobile);
    }

    .logo img {
        height: 2rem;
    }
}

/* ============================================
   Responsive Footer - Tablet
   ============================================ */
@media (max-width: 767px) {
    .footer-grid {
        grid-template-columns: 1fr;
        text-align: center;
        gap: 2rem;
    }

    .footer-logo {
        justify-content: center;
    }

    .footer-contact-block {
        text-align: center;
    }
}

/* ============================================
   Responsive Footer - Small
   ============================================ */
@media (max-width: 480px) {
    .footer {
        padding: 3rem 0 1.5rem;
    }

    .footer-grid {
        grid-template-columns: 1fr;
        text-align: center;
        gap: 1.5rem;
        margin-bottom: 2rem;
    }

    .footer-section {
        margin-bottom: 1rem;
    }
}

/* ============================================
   v2 Nav (prototype nav for all pages)
   ============================================ */
.v2-nav {
    position: fixed; top: 0; left: 0; right: 0; z-index: 100;
    backdrop-filter: blur(20px) saturate(1.4);
    -webkit-backdrop-filter: blur(20px) saturate(1.4);
    background: var(--header-bg);
    border-bottom: 1px solid var(--border);
}
.nav-inner {
    max-width: 1180px; margin: 0 auto;
    padding: 0.75rem 2rem;
    display: flex; align-items: center; justify-content: space-between;
}
.nav-logo svg { height: 30px; width: auto; display: block; }
.nav-links { display: flex; gap: 1.5rem; list-style: none; flex-wrap: wrap; align-items: center; }
.nav-links a {
    color: var(--text-muted); text-decoration: none;
    font-size: 0.84rem; font-weight: 500; transition: color 0.2s;
}
.nav-links a:hover { color: var(--text); }
.nav-cta,
.nav-active {
    padding: 0.42rem 0.95rem; border-radius: 7px;
    font-size: 0.8rem; font-weight: 600;
    background: var(--brand-dim); color: var(--brand-light) !important;
    border: 1px solid rgba(5, 85, 148, 0.25);
    transition: all 0.25s;
}
.nav-cta:hover,
.nav-active:hover { background: rgba(5,85,148,0.22); border-color: rgba(5,85,148,0.45); }

@media (max-width: 768px) {
    .nav-links { display: none; }
    .mobile-menu-btn { display: flex; }
}

/* ============================================
   v2 Footer
   ============================================ */
.v2-footer {
    padding: 4rem 2rem 3rem;
    border-top: 1px solid var(--footer-border);
    color: var(--text-muted);
    font-size: 0.85rem;
    background: var(--footer-bg);
    position: relative;
}
.v2-footer::before {
    content: '';
    position: absolute;
    top: 0; left: 10%; right: 10%; height: 1px;
    background: linear-gradient(90deg, transparent, rgba(5,85,148,0.35), transparent);
}
.v2-footer a { color: var(--text-muted); text-decoration: none; }
.v2-footer a:hover,
.v2-footer a:focus-visible { color: var(--brand-light); }

/* Footer intro text */
.footer-intro {
    text-align: center;
    margin-bottom: 2rem;
}
.footer-intro .footer-logo { margin-bottom: 0.8rem; display: flex; justify-content: center; }
.footer-intro .footer-logo svg { height: 22px; width: auto; }
.footer-intro p { color: var(--text-muted); font-size: 0.88rem; margin: 0; }

/* Footer grid: 3 boxed columns */
.footer-grid {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr;
    gap: 1.2rem;
    margin-bottom: 2rem;
}
.footer-box {
    padding: 1.5rem;
    border-radius: 10px;
    background: var(--white-overlay);
    border: 1px solid var(--border);
}
.footer-heading {
    font-family: var(--font-body);
    font-size: 0.68rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--text-faint);
    margin-bottom: 0.75rem;
}
.footer-box a {
    display: block;
    font-size: 0.85rem;
    line-height: 1.7;
    transition: color 0.2s;
}

/* Footer bottom: copyright */
.footer-bottom {
    text-align: center;
}
.footer-bottom p {
    color: var(--text-faint);
    font-size: 0.78rem;
    margin: 0;
}

@media (max-width: 768px) {
    .footer-grid {
        grid-template-columns: 1fr;
        gap: 1rem;
    }
    .footer-box {
        text-align: center;
    }
}