/* Header Styles - Mobile First */

.site-header {
    position: sticky;
    top: 0;
    left: 0;
    right: 0;
    background-color: var(--bg-primary);
    border-bottom: 1px solid var(--border-color);
    box-shadow: 0 2px 8px var(--shadow);
    z-index: var(--z-header);
    transition: transform var(--transition-normal), background-color var(--transition-normal);
}

.header-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: var(--header-height);
    padding: 0 var(--spacing-md);
}

/* Logo/Site Title */
.site-logo {
    font-size: var(--font-size-lg);
    font-weight: 700;
    color: var(--text-primary);
    text-decoration: none;
    transition: color var(--transition-fast);
    margin-right: auto;
}

.site-logo:hover {
    color: var(--accent-primary);
}

/* Nav Controls (login, theme, burger) */
.nav-controls {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

/* Login Button */
.login-btn {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    background: var(--gradient-primary);
    color: white;
    padding: 0.625rem 1.25rem;
    border-radius: var(--radius-full);
    font-weight: 600;
    font-size: 0.9rem;
    transition: all var(--transition-fast);
    text-decoration: none;
    box-shadow: 0 2px 8px rgba(15, 118, 110, 0.2);
}

.login-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(15, 118, 110, 0.3);
    filter: brightness(1.1);
    color: white;
    text-decoration: none;
}

.login-btn i {
    font-size: 0.875rem;
}

/* User Menu (Logged In) */
.user-menu {
    position: relative;
    margin-left: var(--spacing-md);
}

.user-avatar-wrapper {
    width: 2.5rem;
    height: 2.5rem;
    border-radius: 50%;
    cursor: pointer;
    overflow: hidden;
    border: 2px solid var(--border-color);
    transition: all var(--transition-fast);
}

.user-avatar-wrapper:hover {
    border-color: var(--accent-primary);
    transform: scale(1.05);
}

.user-avatar-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.user-avatar-initial {
    width: 100%;
    height: 100%;
    background: var(--accent-primary);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    font-size: 1rem;
}

.user-dropdown-menu {
    position: absolute;
    top: calc(100% + 0.5rem);
    right: 0;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    box-shadow: 0 4px 12px var(--shadow);
    min-width: 10rem;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-0.5rem);
    transition: all var(--transition-fast);
    z-index: 1000;
}

.user-menu:hover .user-dropdown-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.user-dropdown-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-md);
    color: var(--text-primary);
    text-decoration: none;
    font-family: var(--main-font);
    font-size: 0.9rem;
    transition: background var(--transition-fast);
    cursor: pointer;
    border: none;
    background: none;
    width: 100%;
    text-align: left;
}

.user-dropdown-item:hover {
    background: var(--bg-tertiary);
}

.user-dropdown-item:first-child {
    border-radius: var(--radius-md) var(--radius-md) 0 0;
}

.user-dropdown-item.logout-item {
    color: #e53e3e;
    border-top: 1px solid var(--border-color);
    border-radius: 0 0 var(--radius-md) var(--radius-md);
}

.user-dropdown-item.logout-item:hover {
    background: #fee;
}

/* Theme Toggle Button */
.theme-toggle {
    background: transparent;
    border: none;
    cursor: pointer;
    padding: 0;
    display: flex;
    align-items: center;
    justify-content: center;
}

.theme-toggle-track {
    position: relative;
    width: 4.5rem;
    height: 2.25rem;
    background: var(--bg-tertiary);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    padding: 0 0.3rem;
    transition: all 0.3s ease;
    overflow: hidden;
}

.theme-toggle:hover .theme-toggle-track {
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 3px var(--accent-primary-alpha);
}

.theme-toggle-thumb {
    position: absolute;
    width: 1.65rem;
    height: 1.65rem;
    background: white;
    border-radius: 50%;
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.25);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    left: 0.3rem;
    z-index: 2;
}

[data-theme="dark"] .theme-toggle-thumb {
    left: calc(100% - 1.65rem - 0.3rem);
    background: var(--accent-primary);
    box-shadow: 0 2px 6px rgba(15, 118, 110, 0.4);
}

.theme-icon-sun,
.theme-icon-moon {
    position: absolute;
    font-size: 0.95rem;
    transition: all 0.3s ease;
    z-index: 1;
}

.theme-icon-sun {
    left: 0.65rem;
    color: var(--warning);
    opacity: 1;
}

.theme-icon-moon {
    right: 0.65rem;
    color: var(--accent-secondary);
    opacity: 0.3;
}

[data-theme="dark"] .theme-icon-sun {
    opacity: 0.3;
}

[data-theme="dark"] .theme-icon-moon {
    opacity: 1;
}

[data-theme="dark"] .theme-toggle-track {
    background: rgba(15, 118, 110, 0.2);
}

/* Burger Menu Button (Mobile) */
.burger-menu {
    display: none;
    flex-direction: column;
    justify-content: space-around;
    width: 2rem;
    height: 2rem;
    background: transparent;
    border: none;
    cursor: pointer;
    padding: 0;
    z-index: calc(var(--z-header) + 1);
}

.burger-menu span {
    width: 2rem;
    height: 0.25rem;
    background-color: var(--text-primary);
    border-radius: 0.125rem;
    transition: all var(--transition-normal);
    transform-origin: center;
}

.burger-menu.active span:nth-child(1) {
    transform: rotate(45deg) translate(0.5rem, 0.5rem);
}

.burger-menu.active span:nth-child(2) {
    opacity: 0;
}

.burger-menu.active span:nth-child(3) {
    transform: rotate(-45deg) translate(0.5rem, -0.5rem);
}

/* Main Navigation */
.main-nav {
    display: flex;
    align-items: center;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 0.25rem;
    margin: 0;
    padding: 0;
}

.nav-menu a {
    color: var(--text-primary);
    font-weight: 500;
    padding: 0.5rem 0.75rem;
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
    display: block;
}

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

.nav-menu a.active {
    color: var(--text-primary);
    font-weight: 600;
    border-bottom: 2px solid var(--accent-primary);
}

/* Mobile Menu (<1000px) - Burger Menu */
.burger-menu {
    display: flex;
    z-index: calc(var(--z-header) + 10);
    /* Ensure above menu */
}

.main-nav {
    position: fixed;
    top: 0;
    right: 0;
    height: 100vh;
    width: 100%;
    /* Full width for better mobile experience */
    max-width: 100%;
    background-color: rgba(255, 255, 255, 0.95);
    /* High opacity for readability */
    backdrop-filter: blur(10px);
    transform: translateX(100%);
    transition: transform 0.4s cubic-bezier(0.16, 1, 0.3, 1);
    padding-top: calc(var(--header-height) + var(--spacing-lg));
    display: flex;
    flex-direction: column;
    align-items: center;
    /* Center content */
    justify-content: flex-start;
    justify-content: flex-start;
    z-index: var(--z-header);
    pointer-events: none;
}

[data-theme="dark"] .main-nav {
    background-color: rgba(15, 23, 42, 0.95);
}

.main-nav.active {
    transform: translateX(0);
    box-shadow: none;
    pointer-events: auto;
}

.nav-menu {
    flex-direction: column;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    padding-top: 0;
    width: 100%;
    max-width: 400px;
    text-align: center;
}

.nav-menu a {
    padding: var(--spacing-md);
    border-bottom: none;
    font-size: 1.2rem;
    font-weight: 600;
    border-radius: var(--radius-lg);
    background: transparent;
    transition: all 0.2s ease;
    opacity: 0;
    transform: translateY(20px);
}

.main-nav.active .nav-menu a {
    opacity: 1;
    transform: translateY(0);
    transition-delay: 0.1s;
}

/* Staggered animation for menu items */
.main-nav.active .nav-menu li:nth-child(1) a {
    transition-delay: 0.1s;
}

.main-nav.active .nav-menu li:nth-child(2) a {
    transition-delay: 0.15s;
}

.main-nav.active .nav-menu li:nth-child(3) a {
    transition-delay: 0.2s;
}

.main-nav.active .nav-menu li:nth-child(4) a {
    transition-delay: 0.25s;
}

.main-nav.active .nav-menu li:nth-child(5) a {
    transition-delay: 0.3s;
}

.main-nav.active .nav-menu li:nth-child(6) a {
    transition-delay: 0.35s;
}

.nav-menu a:hover {
    background-color: var(--bg-tertiary);
    transform: scale(1.05);
}

.nav-menu a.active {
    background-color: var(--accent-primary-alpha);
    color: var(--accent-primary);
    border-bottom: none;
}

/* Mobile user controls at top of menu */
.main-nav .mobile-user-controls {
    display: flex;
    flex-direction: column;
    align-items: center;
    width: 100%;
    max-width: 400px;
    padding: 0 var(--spacing-md) var(--spacing-lg);
    margin-bottom: var(--spacing-md);
    border-bottom: 1px solid var(--border-color);
    opacity: 0;
    transform: translateY(20px);
    transition: all 0.4s ease 0.4s;
}

.main-nav.active .mobile-user-controls {
    opacity: 1;
    transform: translateY(0);
}

/* Show login button in mobile menu */
.main-nav .mobile-login-btn {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    background: var(--gradient-primary);
    color: white;
    padding: 1rem 2rem;
    border-radius: var(--radius-full);
    font-weight: 600;
    text-decoration: none;
    justify-content: center;
    transition: all var(--transition-fast);
    width: 100%;
    font-size: 1.1rem;
    box-shadow: var(--shadow-lg);
}

.main-nav .mobile-login-btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-xl);
    filter: brightness(1.1);
}

.main-nav .mobile-user-info {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-sm);
    padding-bottom: var(--spacing-md);
    margin-bottom: var(--spacing-sm);
    text-align: center;
}

.main-nav .mobile-user-avatar {
    width: 5rem;
    height: 5rem;
    border-radius: 50%;
    overflow: hidden;
    border: 3px solid var(--accent-primary);
    box-shadow: var(--shadow-md);
}

.main-nav .mobile-user-avatar img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.main-nav .mobile-user-initial {
    width: 5rem;
    height: 5rem;
    border-radius: 50%;
    background: var(--gradient-primary);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 2rem;
    box-shadow: var(--shadow-md);
}

.main-nav .mobile-user-name {
    font-weight: 700;
    font-size: 1.2rem;
    color: var(--text-primary);
}

.main-nav .mobile-user-actions {
    display: flex;
    gap: var(--spacing-md);
    width: 100%;
    justify-content: center;
}

.main-nav .mobile-user-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: 0.75rem 1.5rem;
    border: 1px solid var(--border-color);
    background: var(--bg-secondary);
    color: var(--text-primary);
    text-decoration: none;
    border-radius: var(--radius-full);
    cursor: pointer;
    font-family: var(--main-font);
    font-size: 0.95rem;
    transition: all var(--transition-fast);
    flex: 1;
}

.main-nav .mobile-user-btn:hover {
    background: var(--bg-tertiary);
    transform: translateY(-2px);
}

.main-nav .mobile-logout-btn {
    color: #e53e3e;
    border-color: rgba(229, 62, 62, 0.2);
    margin-top: 0;
    padding-top: 0.75rem;
}

.main-nav .mobile-logout-btn:hover {
    background: #fee;
    border-color: #e53e3e;
}

/* Desktop Menu (≥1000px) - Full Menu */
@media (min-width: 1000px) {
    .burger-menu {
        display: none;
    }

    .mobile-user-controls {
        display: none !important;
    }

    .header-container {
        max-width: 70%;
        margin: 0 auto;
        padding: 0 var(--spacing-md);
    }

    /* Reset Mobile Styles for Desktop */
    .main-nav {
        position: static;
        height: auto;
        width: auto;
        background-color: transparent;
        backdrop-filter: none;
        transform: none;
        padding: 0;
        flex-direction: row;
        box-shadow: none;
        display: flex !important;
        /* Force display */
        opacity: 1;
        /* Ensure visibility */
        visibility: visible;
        pointer-events: auto;
    }

    .nav-menu {
        flex-direction: row;
        gap: var(--spacing-sm);
        padding: 0;
        width: auto;
        max-width: none;
        text-align: left;
    }

    .nav-menu a {
        padding: 0.5rem 0.75rem;
        border-radius: var(--radius-md);
        font-size: var(--font-size-sm);
        font-weight: 500;
        opacity: 1;
        transform: none;
        background: transparent;
    }

    .nav-menu a:hover {
        background-color: var(--bg-tertiary);
        transform: none;
    }

    .nav-menu a.active {
        background-color: transparent;
        color: var(--text-primary);
        border-bottom: 2px solid var(--accent-primary);
        border-radius: 0;
    }
}

/* Smooth scroll hide/show on scroll */
.site-header.hidden {
    transform: translateY(-100%);
}

/* Prevent scroll when menu is open */
body.menu-open {
    overflow: hidden;
}