/* ==========================================================================
   Top Navigation Styles
   ========================================================================== 
   
   Architecture:
   - Fixed top position with glassmorphism
   - Semantic HTML: <nav><ul><li><a> with ARIA
   - Collapses below 1024px with hamburger toggle
   - 8px spacing rhythm using CSS variables
   - Smooth hover animations (transform/opacity for performance)
   - Light/dark theme transitions
   
   ========================================================================== */

/* ==========================================================================
   BASE NAVIGATION - Fixed Top with Glassmorphism
   ========================================================================== */

.floating-nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: var(--z-fixed);
    padding: var(--space-3) var(--space-4);
    pointer-events: none;
}

.floating-nav__container {
    display: flex;
    flex-direction: row;
    align-items: center;
    gap: var(--space-2);
    width: fit-content; /* Shrink to content, no wasted space */
    max-width: var(--container-xl);
    margin: 0 auto;
    padding: var(--space-2) var(--space-3);
    pointer-events: auto;
    /* overflow visible for dropdowns */
    
    /* Glassmorphism */
    background: var(--glass-bg);
    -webkit-backdrop-filter: var(--glass-blur);
    backdrop-filter: var(--glass-blur);
    border: var(--glass-border);
    border-radius: var(--radius-2xl);
    box-shadow: var(--glass-shadow);
    
    /* Smooth theme transitions */
    transition: 
        background var(--duration-slow) var(--ease-in-out),
        border-color var(--duration-slow) var(--ease-in-out),
        box-shadow var(--duration-slow) var(--ease-in-out);
}

/* ==========================================================================
   BRAND / LOGO - "muntasir." with Poppins + Red Dot
   ========================================================================== */

.floating-nav__brand {
    display: flex;
    align-items: center;
    padding: var(--space-2) var(--space-3);
    font-family: var(--font-family-sans); /* Poppins */
    font-size: var(--font-size-xl);
    font-weight: var(--font-weight-bold);
    color: var(--color-text);
    text-decoration: none;
    white-space: nowrap;
    letter-spacing: var(--letter-spacing-tight);
    flex-shrink: 0;
    /* No hover effect - brand stays static */
    cursor: default;
    pointer-events: none; /* Disable hover/click */
}

.floating-nav__brand:focus-visible {
    outline: var(--focus-ring-width) solid var(--color-focus-ring);
    outline-offset: var(--focus-ring-offset);
    border-radius: var(--radius-md);
}

/* Red dot after the name */
.floating-nav__brand::after {
    content: '.';
    color: var(--color-tertiary); /* Red from brand colors */
    font-weight: var(--font-weight-bold);
    margin-left: -2px;
}

/* ==========================================================================
   DIVIDER - Vertical separator
   ========================================================================== */

.floating-nav__divider {
    width: 1px;
    height: var(--space-6); /* 24px - 8px rhythm */
    background-color: var(--color-border);
    margin: 0 var(--space-2);
    flex-shrink: 0;
    opacity: 0.5;
    transition: background-color var(--duration-slow) var(--ease-in-out);
}

/* ==========================================================================
   NAVIGATION LIST - Semantic <ul><li><a>
   ========================================================================== */

.floating-nav__list {
    display: flex;
    flex-direction: row;
    align-items: center;
    gap: var(--space-1); /* 4px */
    margin: 0;
    padding: 0;
    list-style: none;
}

.floating-nav__item {
    position: relative;
}

.floating-nav__link {
    display: flex;
    align-items: center;
    gap: var(--space-2); /* 8px */
    padding: var(--space-2) var(--space-3); /* 8px 12px */
    border-radius: var(--radius-lg);
    color: var(--color-text-secondary);
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    text-decoration: none;
    white-space: nowrap;
    position: relative;
    
    /* Performance-optimized hover animations */
    transition: 
        color var(--duration-normal) var(--ease-in-out),
        background-color var(--duration-normal) var(--ease-in-out),
        transform var(--duration-fast) var(--ease-out),
        opacity var(--duration-normal) var(--ease-in-out);
}

/* Hover state with transform for smooth animation */
.floating-nav__link:hover {
    color: var(--color-primary);
    background-color: var(--color-primary-subtle);
    transform: translateY(-1px);
}

/* Active/pressed state */
.floating-nav__link:active {
    transform: translateY(0) scale(0.98);
}

/* Focus visible for accessibility */
.floating-nav__link:focus-visible {
    outline: var(--focus-ring-width) solid var(--color-focus-ring);
    outline-offset: var(--focus-ring-offset);
}

/* Current page indicator */
.floating-nav__link--active,
.floating-nav__link[aria-current="page"] {
    color: var(--color-primary);
    background-color: var(--color-primary-emphasis);
    font-weight: var(--font-weight-semibold);
}

/* Icon sizing - 8px grid aligned */
.floating-nav__link svg,
.floating-nav__link i {
    width: var(--icon-size-sm); /* 18px */
    height: var(--icon-size-sm);
    flex-shrink: 0;
    stroke-width: var(--icon-stroke-default); /* Consistent stroke */
    transition: transform var(--duration-fast) var(--ease-out);
}

/* Icon animation on hover */
.floating-nav__link:hover svg,
.floating-nav__link:hover i {
    transform: scale(1.1);
}

/* Label */
.floating-nav__label {
    display: inline;
}

/* ==========================================================================
   DROPDOWN MENUS - Offerings & Contents
   ========================================================================== */

.floating-nav__item--dropdown {
    position: relative;
}

/* Dropdown trigger button */
.floating-nav__link--dropdown {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-2) var(--space-3);
    border: none;
    background: transparent;
    border-radius: var(--radius-lg);
    color: var(--color-text-secondary);
    font-family: inherit;
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    cursor: pointer;
    white-space: nowrap;
    
    transition: 
        color var(--duration-normal) var(--ease-in-out),
        background-color var(--duration-normal) var(--ease-in-out);
}

.floating-nav__link--dropdown:hover {
    color: var(--color-primary);
    background-color: var(--color-primary-subtle);
}

.floating-nav__link--dropdown:focus-visible {
    outline: var(--focus-ring-width) solid var(--color-focus-ring);
    outline-offset: var(--focus-ring-offset);
}

/* Chevron icon */
.floating-nav__chevron {
    width: var(--icon-size-xs) !important; /* 14px */
    height: var(--icon-size-xs) !important;
    margin-left: calc(var(--space-1) * -1);
    transition: transform var(--duration-normal) var(--ease-out);
}

.floating-nav__item--open .floating-nav__chevron {
    transform: rotate(180deg);
}

/* Dropdown menu */
.floating-nav__dropdown {
    position: absolute;
    top: calc(100% + var(--space-2));
    left: 50%;
    transform: translateX(-50%);
    min-width: 160px;
    padding: var(--space-2);
    margin: 0;
    list-style: none;
    
    /* Glassmorphism - matching nav container */
    background: var(--glass-bg);
    -webkit-backdrop-filter: var(--glass-blur);
    backdrop-filter: var(--glass-blur);
    border: var(--glass-border);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-lg);
    
    /* Hidden by default */
    opacity: 0;
    visibility: hidden;
    transform: translateX(-50%) translateY(-8px);
    transition: 
        opacity var(--duration-normal) var(--ease-out),
        transform var(--duration-normal) var(--ease-out),
        visibility var(--duration-normal);
    
    z-index: var(--z-dropdown);
}

/* Dropdown open state */
.floating-nav__item--open .floating-nav__dropdown {
    opacity: 1;
    visibility: visible;
    transform: translateX(-50%) translateY(0);
}

/* Dropdown items */
.floating-nav__dropdown-item {
    margin: 0;
}

.floating-nav__dropdown-link {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-2) var(--space-3);
    border-radius: var(--radius-md);
    color: var(--color-text-secondary);
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    text-decoration: none;
    white-space: nowrap;
    
    transition: 
        color var(--duration-normal) var(--ease-in-out),
        background-color var(--duration-normal) var(--ease-in-out);
}

.floating-nav__dropdown-link:hover {
    color: var(--color-primary);
    background-color: var(--color-primary-subtle);
}

.floating-nav__dropdown-link:focus-visible {
    outline: var(--focus-ring-width) solid var(--color-focus-ring);
    outline-offset: var(--focus-ring-offset);
}

.floating-nav__dropdown-link--active {
    color: var(--color-primary);
    background-color: var(--color-primary-emphasis);
    font-weight: var(--font-weight-semibold);
}

/* Dropdown link icons */
.floating-nav__dropdown-link svg,
.floating-nav__dropdown-link i {
    width: var(--icon-size-sm);
    height: var(--icon-size-sm);
    flex-shrink: 0;
    stroke-width: var(--icon-stroke-default);
}

/* ==========================================================================
   ACTION BUTTONS (Theme Toggle, Search)
   ========================================================================== */

.floating-nav__actions {
    display: flex;
    align-items: center;
    gap: var(--space-1);
    flex-shrink: 0;
}

.floating-nav__btn {
    width: var(--space-9); /* 36px - fits better */
    height: var(--space-9);
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-full);
    border: none;
    background: transparent;
    color: var(--color-text-secondary);
    cursor: pointer;
    flex-shrink: 0;
    position: relative;
    
    /* Performance-optimized transitions */
    transition: 
        color var(--duration-normal) var(--ease-in-out),
        background-color var(--duration-normal) var(--ease-in-out),
        transform var(--duration-fast) var(--ease-out);
}

.floating-nav__btn:hover {
    color: var(--color-primary);
    background-color: var(--color-primary-subtle);
    transform: scale(1.05);
}

.floating-nav__btn:active {
    transform: scale(0.95);
}

.floating-nav__btn:focus-visible {
    outline: var(--focus-ring-width) solid var(--color-focus-ring);
    outline-offset: var(--focus-ring-offset);
}

/* Icon sizing - consistent stroke */
.floating-nav__btn svg,
.floating-nav__btn i {
    width: var(--icon-size-md); /* 20px */
    height: var(--icon-size-md);
    stroke-width: var(--icon-stroke-default);
}

/* Theme Toggle Icons */
.floating-nav__btn--theme .icon--sun {
    display: block;
}

.floating-nav__btn--theme .icon--moon {
    display: none;
}

[data-theme="dark"] .floating-nav__btn--theme .icon--sun {
    display: none;
}

[data-theme="dark"] .floating-nav__btn--theme .icon--moon {
    display: block;
}

/* ==========================================================================
   MOBILE TOGGLE - Hamburger/Close Button
   ========================================================================== */

.floating-nav__toggle {
    display: none;
    width: var(--space-10); /* 40px */
    height: var(--space-10);
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-full);
    border: none;
    background-color: var(--color-primary);
    color: var(--color-text-inverse);
    cursor: pointer;
    flex-shrink: 0;
    
    /* Transitions */
    transition: 
        background-color var(--duration-normal) var(--ease-in-out),
        transform var(--duration-fast) var(--ease-out);
}

.floating-nav__toggle:hover {
    background-color: var(--color-primary-hover);
    transform: scale(1.05);
}

.floating-nav__toggle:active {
    transform: scale(0.95);
}

.floating-nav__toggle:focus-visible {
    outline: var(--focus-ring-width) solid var(--color-focus-ring);
    outline-offset: var(--focus-ring-offset);
}

.floating-nav__toggle svg,
.floating-nav__toggle i {
    width: var(--icon-size-md);
    height: var(--icon-size-md);
    stroke-width: var(--icon-stroke-medium);
}

/* Toggle icon states */
.floating-nav__toggle-open {
    display: block;
}

.floating-nav__toggle-close {
    display: none;
}

.floating-nav--expanded .floating-nav__toggle-open {
    display: none;
}

.floating-nav--expanded .floating-nav__toggle-close {
    display: block;
}

/* Legacy icon support */
.floating-nav__toggle svg:last-child {
    display: none;
}

.floating-nav--expanded .floating-nav__toggle svg:first-child {
    display: none;
}

.floating-nav--expanded .floating-nav__toggle svg:last-child {
    display: block;
}

/* ==========================================================================
   RESPONSIVE - Below 1024px (Collapse Navigation)
   ========================================================================== */

@media (max-width: 768px) {
    .floating-nav__container {
        padding: var(--space-2) var(--space-3);
    }
    
    /* Show toggle button */
    .floating-nav__toggle {
        display: flex;
    }
    
    /* Hide nav list and dividers by default */
    .floating-nav__list {
        display: none;
    }
    
    .floating-nav__divider {
        display: none;
    }
    
    /* Keep actions visible */
    .floating-nav__actions {
        margin-left: auto;
    }
    
    /* Expanded state */
    .floating-nav--expanded .floating-nav__container {
        flex-wrap: wrap;
        border-radius: var(--radius-2xl);
        padding: var(--space-3);
    }
    
    .floating-nav--expanded .floating-nav__list {
        display: flex;
        flex-direction: column;
        width: 100%;
        order: 10; /* Push to bottom */
        gap: var(--space-1);
        padding-top: var(--space-3);
        border-top: 1px solid var(--color-border-subtle);
        margin-top: var(--space-2);
    }
    
    .floating-nav--expanded .floating-nav__item {
        width: 100%;
    }
    
    .floating-nav--expanded .floating-nav__link {
        width: 100%;
        padding: var(--space-3) var(--space-4);
        border-radius: var(--radius-lg);
        justify-content: flex-start;
    }
    
    .floating-nav--expanded .floating-nav__label {
        display: inline;
    }
    
    /* Mobile dropdown styles */
    .floating-nav--expanded .floating-nav__item--dropdown {
        width: 100%;
    }
    
    .floating-nav--expanded .floating-nav__link--dropdown {
        width: 100%;
        padding: var(--space-3) var(--space-4);
        border-radius: var(--radius-lg);
        justify-content: flex-start;
    }
    
    /* Reset desktop dropdown positioning for mobile */
    /* Reset desktop dropdown positioning for mobile - FLATTENED */
    .floating-nav--expanded .floating-nav__dropdown {
        position: static !important;
        transform: none !important;
        min-width: auto;
        width: 100%;
        min-height: auto;
        padding: 0;
        background: transparent;
        border: none;
        box-shadow: none;
        
        /* Force Expand */
        display: flex;
        flex-direction: column;
        max-height: none;
        overflow: visible;
        opacity: 1;
        visibility: visible;
        margin-top: 0;
        gap: var(--space-1);
    }

    /* Force item column layout */
    .floating-nav--expanded .floating-nav__item--dropdown {
        flex-direction: column;
        width: 100%;
    }

    /* HIDE the Trigger Button (Offerings / Contents) */
    .floating-nav--expanded .floating-nav__link--dropdown {
        display: none !important;
    }
    
    .floating-nav--expanded .floating-nav__dropdown-item {
        margin: 0;
        width: 100%;
    }

    /* Style dropdown links to look exactly like top-level links */
    .floating-nav--expanded .floating-nav__dropdown-link {
        width: 100%;
        padding: var(--space-3) var(--space-4);
        padding-left: var(--space-4); /* Same indentation as top level */
        margin: 0;
        color: var(--color-text-secondary);
        background-color: transparent;
        border-radius: var(--radius-lg);
        font-size: var(--font-size-sm);
        font-weight: var(--font-weight-medium);
        justify-content: flex-start;
        display: flex;
        align-items: center;
        gap: var(--space-2);
    }
    
    .floating-nav--expanded .floating-nav__dropdown-link:hover {
        background-color: var(--color-primary-subtle);
        color: var(--color-primary);
    }

    .floating-nav--expanded .floating-nav__dropdown-link--active {
        background-color: var(--color-primary-emphasis);
        color: var(--color-primary);
        font-weight: var(--font-weight-semibold);
    }
}

/* ==========================================================================
   RESPONSIVE - Mobile (< 768px)
   ========================================================================== */

@media (max-width: 767px) {
    .floating-nav {
        padding: var(--space-2);
    }
    
    .floating-nav__container {
        padding: var(--space-2);
    }
    
    .floating-nav__brand {
        font-size: var(--font-size-lg);
        padding: var(--space-1) var(--space-2);
    }
    
    .floating-nav__btn {
        width: 36px;
        height: 36px;
    }
    
    .floating-nav__toggle {
        width: 36px;
        height: 36px;
    }
    
    .floating-nav--expanded .floating-nav__list {
        max-height: 60vh;
        overflow-y: auto;
    }
}

/* ==========================================================================
   SKIP NAVIGATION LINK - Accessibility
   ========================================================================== */

.floating-nav__skip {
    position: absolute;
    top: var(--space-2);
    left: var(--space-4);
    padding: var(--space-2) var(--space-4);
    background-color: var(--color-primary);
    color: var(--color-text-inverse);
    border-radius: var(--radius-md);
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    text-decoration: none;
    z-index: var(--z-tooltip);
    
    /* Hiding mechanism */
    opacity: 0;
    pointer-events: none;
    transform: translateY(-150%);
    
    transition: 
        transform var(--duration-fast) var(--ease-out),
        opacity var(--duration-fast) var(--ease-in-out);
}

.floating-nav__skip:focus {
    opacity: 1;
    pointer-events: auto;
    transform: translateY(0);
}

/* ==========================================================================
   COMMAND PALETTE / SEARCH
   ========================================================================== */

.command-palette {
    position: fixed;
    inset: 0;
    z-index: var(--z-modal);
    display: flex;
    align-items: flex-start;
    justify-content: center;
    padding-top: 15vh;
}

.command-palette__backdrop {
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0.5);
    -webkit-backdrop-filter: blur(4px);
    backdrop-filter: blur(4px);
}

.command-palette__dialog {
    position: relative;
    width: 100%;
    max-width: 600px;
    margin: 0 var(--space-4);
    background: var(--color-surface);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-xl);
    overflow: hidden;
    border: 1px solid var(--color-border);
}

.command-palette__header {
    display: flex;
    align-items: center;
    padding: var(--space-4);
    border-bottom: 1px solid var(--color-border);
    gap: var(--space-3);
}

.command-palette__search-icon {
    color: var(--color-text-muted);
    flex-shrink: 0;
}

.command-palette__input {
    flex: 1;
    background: transparent;
    border: none;
    font-size: var(--text-lg);
    color: var(--color-text);
    outline: none;
}

.command-palette__input::placeholder {
    color: var(--color-text-muted);
}

.command-palette__kbd {
    padding: var(--space-1) var(--space-2);
    background: var(--color-bg);
    border-radius: var(--radius-sm);
    font-size: var(--text-xs);
    font-family: var(--font-code);
    color: var(--color-text-muted);
}

.command-palette__results {
    max-height: 400px;
    overflow-y: auto;
}

.command-palette__empty,
.command-palette__loading {
    padding: var(--space-8);
    text-align: center;
    color: var(--color-text-muted);
}

.command-palette__result {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    padding: var(--space-3) var(--space-4);
    transition: background-color var(--duration-fast) var(--ease-in-out);
}

.command-palette__result:hover {
    background-color: var(--color-primary-subtle);
}

.command-palette__result svg {
    color: var(--color-text-muted);
    flex-shrink: 0;
}

.command-palette__result-content {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.command-palette__result-title {
    font-weight: var(--font-medium);
    color: var(--color-text);
}

.command-palette__result-type {
    font-size: var(--text-xs);
    color: var(--color-text-muted);
}

.command-palette__footer {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-6);
    padding: var(--space-3) var(--space-4);
    border-top: 1px solid var(--color-border);
    font-size: var(--text-xs);
    color: var(--color-text-muted);
}

.command-palette__footer kbd {
    padding: 2px 6px;
    background: var(--color-bg);
    border-radius: var(--radius-sm);
    font-family: var(--font-code);
}