/* ================================
   HEADER
   ================================ */

.site-header {
    position: sticky;
    top: 0;
    z-index: 1000;
    border-bottom: 1px solid var(--border-color);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
}

[data-theme="dark"] .site-header {
    background: rgba(10, 10, 12, .72);
}

[data-theme="light"] .site-header {
    background: rgba(255, 255, 255, .88);
}

.header-nav {
    width: 100%;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
    height: 64px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 32px;
}

/* Logo */
.logo-section {
    flex-shrink: 0;
}

.logo-link {
    display: flex;
    align-items: center;
    gap: 12px;
    text-decoration: none;
}

.logo-icon {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 10px;
    overflow: hidden;
}

.logo-icon-img {
    width: 32px;
    height: 32px;
    border-radius: 0;
}

.logo-svg {
    width: 18px;
    height: 18px;
    color: white;
}

.logo-text {
    display: flex;
    flex-direction: column;
}

.logo-title {
    font-size: 1rem;
    font-weight: 700;
    color: var(--text-primary);
    line-height: 1.2;
    letter-spacing: -0.03em;
}

.logo-subtitle {
    display: none;
}

/* Desktop Navigation */
.desktop-nav {
    display: flex;
    align-items: center;
    gap: 4px;
    flex: 1;
    justify-content: center;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 9999px;
    padding: 4px;
    max-width: fit-content;
    margin: 0 auto;
}

.nav-link {
    display: inline-flex;
    align-items: center;
    gap: 0;
    padding: 8px 16px;
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    font-size: 0.8125rem;
    border-radius: 9999px;
    transition: color .2s ease, background .2s ease;
    position: relative;
    cursor: pointer;
}

.nav-link .nav-icon {
    display: none;
}

.nav-link:hover {
    color: var(--text-primary);
    background: var(--hover-bg);
}

.nav-link.active {
    color: #fff;
    background: var(--color-primary);
    box-shadow: 0 4px 12px rgba(59, 130, 246, .25);
}

/* User Section */
.user-section {
    display: flex;
    align-items: center;
    gap: 10px;
    flex-shrink: 0;
}

/* Theme Toggle */
.theme-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    background: transparent;
    border: 1px solid var(--border-color);
    border-radius: 10px;
    cursor: pointer;
    transition: background .2s ease, border-color .2s ease, color .2s ease;
    padding: 0;
    color: var(--text-secondary);
}

.theme-toggle:hover {
    background: var(--hover-bg);
    border-color: var(--text-muted);
    color: var(--text-primary);
}

.theme-icon {
    width: 18px;
    height: 18px;
}

/* User Menu */
#userMenu {
    display: flex;
    align-items: center;
    gap: 10px;
}

.user-name-link {
    text-decoration: none;
}

.user-name {
    color: var(--text-primary);
    font-weight: 600;
    font-size: 0.8125rem;
    padding: 6px 14px 6px 8px;
    background: var(--bg-tertiary);
    border-radius: 10px;
    border: 1px solid var(--border-color);
    display: inline-flex;
    align-items: center;
    gap: 8px;
    transition: border-color .2s ease;
}

.header-profile-avatar {
    width: 24px;
    height: 24px;
    flex: 0 0 24px;
    border-radius: 50%;
    overflow: hidden;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-secondary);
}

.header-profile-avatar img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 50%;
    display: block;
}

.header-profile-avatar img[hidden] {
    display: none;
}

.header-profile-avatar svg {
    width: 16px;
    height: 16px;
    color: var(--text-muted);
}

.header-profile-avatar svg[hidden] {
    display: none;
}

.user-name:hover {
    border-color: var(--text-muted);
}

.btn-logout {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 8px 14px;
    background: transparent;
    color: var(--text-muted);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    font-weight: 500;
    font-size: 0.8125rem;
    cursor: pointer;
    transition: color .2s ease, border-color .2s ease, background .2s ease;
    font-family: inherit;
}

.btn-logout:hover {
    color: var(--color-danger);
    border-color: var(--color-danger);
    background: rgba(239, 68, 68, .08);
}

.logout-icon {
    width: 15px;
    height: 15px;
}

/* Auth Buttons */
#authButtons {
    display: flex;
    align-items: center;
    gap: 6px;
}

.btn-login {
    padding: 8px 16px;
    color: var(--text-secondary);
    background: transparent;
    border: 1px solid transparent;
    border-radius: 10px;
    text-decoration: none;
    font-weight: 500;
    font-size: 0.8125rem;
    transition: color .2s ease, background .2s ease, border-color .2s ease;
}

.btn-login:hover {
    color: var(--text-primary);
    background: var(--hover-bg);
    border-color: var(--border-color);
}

.btn-register {
    padding: 8px 16px;
    background: var(--color-primary);
    color: white;
    border: none;
    border-radius: 10px;
    text-decoration: none;
    font-weight: 600;
    font-size: 0.8125rem;
    transition: background .2s ease, transform .2s ease, box-shadow .2s ease;
    box-shadow: 0 4px 12px rgba(59, 130, 246, .25);
}

.btn-register:hover {
    background: var(--color-primary-hover);
    transform: translateY(-1px);
    box-shadow: 0 6px 16px rgba(59, 130, 246, .35);
}

/* Mobile Menu Button */
.mobile-menu-btn {
    display: none;
    background: transparent;
    border: 1px solid var(--border-color);
    border-radius: 10px;
    padding: 8px;
    cursor: pointer;
    transition: background .2s ease, border-color .2s ease;
    color: var(--text-primary);
}

.mobile-menu-btn:hover {
    background: var(--hover-bg);
    border-color: var(--text-muted);
}

.menu-icon {
    width: 20px;
    height: 20px;
}

/* Mobile Navigation */
.mobile-nav {
    display: none;
    flex-direction: column;
    border-top: 1px solid var(--border-color);
    max-height: 0;
    overflow: hidden;
    transition: max-height .35s ease, padding .35s ease;
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
}

[data-theme="dark"] .mobile-nav {
    background: rgba(10, 10, 12, .95);
}

[data-theme="light"] .mobile-nav {
    background: rgba(255, 255, 255, .95);
}

.mobile-nav.active {
    max-height: 500px;
    padding: 16px 0;
}

.mobile-nav-link {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 12px 24px;
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    font-size: 0.875rem;
    transition: color .15s ease, background .15s ease;
}

.mobile-nav-link:hover {
    color: var(--text-primary);
    background: var(--hover-bg);
}

.mobile-auth-section {
    padding: 16px 24px;
    border-top: 1px solid var(--border-color);
    margin-top: 8px;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.mobile-theme-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    width: 100%;
    padding: 10px;
    background: transparent;
    border: 1px solid var(--border-color);
    border-radius: 10px;
    color: var(--text-secondary);
    font-weight: 500;
    font-size: 0.8125rem;
    cursor: pointer;
    transition: background .2s ease, border-color .2s ease, color .2s ease;
    font-family: inherit;
}

.mobile-theme-toggle:hover {
    background: var(--hover-bg);
    border-color: var(--text-muted);
    color: var(--text-primary);
}

.mobile-user-name {
    display: block;
    color: var(--text-primary);
    font-weight: 600;
    font-size: 0.875rem;
    margin-bottom: 6px;
}

.mobile-btn-logout {
    width: 100%;
    padding: 10px;
    background: transparent;
    color: var(--color-danger);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    font-weight: 500;
    font-size: 0.8125rem;
    cursor: pointer;
    transition: background .2s ease, border-color .2s ease;
    font-family: inherit;
}

.mobile-btn-logout:hover {
    background: rgba(239, 68, 68, .08);
    border-color: var(--color-danger);
}

.mobile-btn-login,
.mobile-btn-register {
    display: block;
    width: 100%;
    padding: 10px;
    text-align: center;
    border-radius: 10px;
    text-decoration: none;
    font-weight: 500;
    font-size: 0.8125rem;
    transition: background .2s ease, border-color .2s ease, transform .2s ease;
}

.mobile-btn-login {
    color: var(--text-secondary);
    background: transparent;
    border: 1px solid var(--border-color);
}

.mobile-btn-login:hover {
    background: var(--hover-bg);
    border-color: var(--text-muted);
    color: var(--text-primary);
}

.mobile-btn-register {
    background: var(--color-primary);
    color: white;
    border: none;
}

.mobile-btn-register:hover {
    background: var(--color-primary-hover);
    transform: translateY(-1px);
}

/* Main Content Spacing */
.main-content {
    min-height: calc(100vh - 64px - 300px);
}

/* ================================
   FOOTER
   ================================ */

.site-footer {
    background: var(--bg-secondary);
    border-top: 1px solid var(--border-color);
    color: var(--text-secondary);
}

.footer-container {
    max-width: 1120px;
    margin: 0 auto;
    padding: 48px 24px 24px;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 48px;
    margin-bottom: 32px;
    padding-bottom: 32px;
    border-bottom: 1px solid var(--border-color);
}

.footer-brand {
    display: flex;
    flex-direction: column;
}

/* Footer Logo */
.footer-logo {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 12px;
}

.footer-logo-icon {
    width: 24px;
    height: 24px;
    color: var(--color-primary);
}

.footer-logo-text {
    font-size: 0.9375rem;
    font-weight: 600;
    color: var(--text-primary);
}

.footer-description {
    color: var(--text-muted);
    line-height: 1.6;
    font-size: 0.8125rem;
    max-width: 280px;
}

/* Footer Headings */
.footer-heading {
    color: var(--text-primary);
    font-size: 0.8125rem;
    font-weight: 600;
    margin-bottom: 16px;
    text-transform: uppercase;
    letter-spacing: .04em;
}

/* Footer Links */
.footer-links {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.footer-link {
    color: var(--text-muted);
    text-decoration: none;
    font-size: 0.8125rem;
    transition: color .15s ease;
}

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

/* Footer Bottom */
.footer-bottom {
    padding-top: 0;
}

.footer-bottom-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 12px;
}

.copyright {
    color: var(--text-muted);
    font-size: 0.75rem;
    margin: 0;
}

.footer-legal {
    display: flex;
    align-items: center;
    gap: 16px;
}

.legal-link {
    color: var(--text-muted);
    text-decoration: none;
    font-size: 0.75rem;
    transition: color .15s ease;
}

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

.separator {
    color: var(--border-color);
    font-size: 0.75rem;
}

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

@media (max-width: 1024px) {
    .desktop-nav {
        display: none;
    }

    .mobile-menu-btn {
        display: block;
    }

    .mobile-nav {
        display: flex;
    }
}

@media (max-width: 768px) {
    .nav-container {
        padding: 0 16px;
    }

    .user-section .btn-login,
    .user-section .btn-register,
    .user-section #userMenu {
        display: none;
    }

    .footer-grid {
        grid-template-columns: 1fr 1fr;
        gap: 32px;
    }

    .footer-bottom-content {
        flex-direction: column;
        text-align: center;
    }
}

@media (max-width: 480px) {
    .logo-text {
        display: none;
    }

    .footer-grid {
        grid-template-columns: 1fr;
        gap: 24px;
    }

    .footer-container {
        padding: 32px 16px 16px;
    }
}

/* Nav click animation (kept for JS compat) */
.nav-link.clicking {
    opacity: .7;
    transition: opacity .1s ease;
}

.scroll-indicator {
    display: none;
}