/* ============================================
   GLASSMORPHISM NAVBAR STYLES
   Modern navigation with frosted glass effect,
   scroll-based transformations, and slide-in
   mobile drawer menu.
   
   This file overrides the old navbar styles
   from style.css
   ============================================ */

/* ============================================
   CSS CUSTOM PROPERTIES (Variables)
   Centralized design tokens for easy theming
   ============================================ */
:root {
    /* Navbar dimensions - default (expanded) state */
    --navbar-height: 80px;
    --navbar-height-scrolled: 64px;
    --navbar-padding: 1.25rem;
    --navbar-padding-scrolled: 0.6rem;
    
    /* Logo sizes for smooth scaling */
    --logo-height: 48px;
    --logo-height-scrolled: 38px;
    
    /* CTA button sizes for proportional scaling */
    --cta-padding-y: 0.7rem;
    --cta-padding-x: 1.6rem;
    --cta-padding-y-scrolled: 0.5rem;
    --cta-padding-x-scrolled: 1.25rem;
    --cta-font-size: 0.95rem;
    --cta-font-size-scrolled: 0.85rem;
    
    /* Glassmorphism effect values
       Using high opacity (0.97) to ensure bright white appearance
       even on pages with slightly darker backgrounds */
    --glass-bg: rgba(255, 255, 255, 0);
    --glass-bg-scrolled: rgba(255, 255, 255, 0.97);
    --glass-blur: 12px;
    --glass-border: rgba(91, 58, 255, 0.08);
    --glass-shadow: 0 2px 16px rgba(91, 58, 255, 0.06);
    
    /* Brand colors */
    --color-primary: #5B3AFF;
    --color-primary-hover: #491CFF;
    --color-text: #121212;
    --color-text-muted: #555;
    
    /* 
       TRANSITION TIMING
       Using a single, consistent duration and easing for all navbar elements
       to ensure they animate together smoothly without jarring breakpoints
    */
    --navbar-transition-duration: 0.35s;
    --navbar-transition-easing: cubic-bezier(0.25, 0.1, 0.25, 1);
    
    /* Mobile drawer */
    --drawer-width: 320px;
    --drawer-bg: rgba(255, 255, 255, 0.98);
    --overlay-bg: rgba(0, 0, 0, 0.5);
}


/* ============================================
   RESET OLD HEADER STYLES
   Override any conflicting styles from style.css
   ============================================ */
header.navbar {
    /* Reset all old header styles */
    background-color: transparent;
    box-shadow: none;
    padding: 0;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    width: 100%;
}


/* ============================================
   BODY PADDING FOR FIXED NAVBAR
   Adds space at top of page so content doesn't
   hide behind the fixed navbar
   ============================================ */
body {
    /* Add padding to account for fixed navbar height */
    padding-top: var(--navbar-height);
}

/* Responsive padding adjustments */
@media (max-width: 768px) {
    body {
        /* Slightly less padding on mobile due to smaller navbar */
        padding-top: 72px;
    }
}

@media (max-width: 480px) {
    body {
        padding-top: 64px;
    }
}


/* ============================================
   MAIN NAVBAR STYLES
   Fixed position with smooth scroll transitions
   
   SOLUTION FOR SMOOTH TRANSITIONS:
   - Use a solid white pseudo-element background layer
   - This ensures consistent #FFFFFF background regardless
     of page content behind the navbar
   - Backdrop-filter doesn't animate well, so we snap it
   - Only padding transitions smoothly (size change)
   ============================================ */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: var(--navbar-padding) 0;
    /* Start with transparent - no background initially */
    background: transparent;
    border-bottom: 1px solid transparent;
    box-shadow: none;
    /* 
       Only transition properties that animate smoothly:
       - padding (size change)
       - border-color (subtle)
       - box-shadow (subtle)
       
       NOTE: We do NOT transition background or backdrop-filter
       as these cause visual "breaks" in most browsers
    */
    transition: 
        padding var(--navbar-transition-duration) var(--navbar-transition-easing),
        border-color var(--navbar-transition-duration) var(--navbar-transition-easing),
        box-shadow var(--navbar-transition-duration) var(--navbar-transition-easing);
    /* Safari fix for fixed positioning and smooth rendering */
    -webkit-transform: translateZ(0);
    transform: translateZ(0);
}

/* 
   SOLID WHITE BACKGROUND LAYER
   This pseudo-element provides a guaranteed #FFFFFF white background
   that fades in on scroll. The solid white ensures no page content
   bleeds through the navbar.
*/
.navbar::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    /* Pure white background - no transparency issues */
    background: #FFFFFF;
    /* Start invisible */
    opacity: 0;
    /* Smooth fade in/out for the background */
    transition: opacity var(--navbar-transition-duration) var(--navbar-transition-easing);
    /* Behind navbar content */
    z-index: -1;
    /* Prevent pointer events on pseudo-element */
    pointer-events: none;
}

/* Scrolled state - show solid white background */
.navbar[data-scrolled="true"]::before {
    opacity: 1;
}

/* Scrolled state - activate visual styling */
.navbar[data-scrolled="true"] {
    padding: var(--navbar-padding-scrolled) 0;
    border-bottom: 1px solid rgba(0, 0, 0, 0.06);
    box-shadow: 0 1px 8px rgba(0, 0, 0, 0.04);
}


/* ============================================
   NAVBAR CONTAINER
   Three-column grid layout for logo/nav/cta
   ============================================ */
.navbar__container {
    display: grid;
    grid-template-columns: auto 1fr auto;
    align-items: center;
    gap: 2rem;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}


/* ============================================
   LOGO STYLES
   Uses same transition timing as navbar for
   synchronized shrinking animation
   ============================================ */
.navbar__logo {
    display: flex;
    align-items: center;
    text-decoration: none;
    transition: opacity 0.2s ease;
}

.navbar__logo img {
    height: var(--logo-height);
    width: auto;
    /* Match navbar transition for synchronized animation */
    transition: height var(--navbar-transition-duration) var(--navbar-transition-easing);
    will-change: height;
}

/* Smaller logo when scrolled - proportional to navbar shrink */
.navbar[data-scrolled="true"] .navbar__logo img {
    height: var(--logo-height-scrolled);
}

.navbar__logo:hover {
    opacity: 0.85;
}


/* ============================================
   NAVIGATION LINKS
   Centered with subtle hover effects
   Font size transitions with navbar for cohesion
   ============================================ */
.navbar__nav {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 0.25rem;
}

.navbar__link {
    position: relative;
    display: inline-flex;
    align-items: center;
    padding: 0.5rem 1rem;
    font-family: 'DM Sans', sans-serif;
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--color-text);
    text-decoration: none;
    border-radius: 8px;
    /* Synchronized transition with navbar */
    transition: 
        padding var(--navbar-transition-duration) var(--navbar-transition-easing),
        font-size var(--navbar-transition-duration) var(--navbar-transition-easing),
        color 0.2s ease,
        background-color 0.2s ease;
}

/* Slightly smaller nav links when scrolled */
.navbar[data-scrolled="true"] .navbar__link {
    padding: 0.4rem 0.85rem;
    font-size: 0.9rem;
}

/* Hover state - subtle background */
.navbar__link:hover {
    color: var(--color-primary);
    background-color: rgba(91, 58, 255, 0.06);
}

/* Active state - current page indicator */
.navbar__link--active {
    color: var(--color-primary);
    font-weight: 600;
}

/* Animated underline for active link */
.navbar__link--active::after {
    content: '';
    position: absolute;
    bottom: 4px;
    left: 50%;
    transform: translateX(-50%);
    width: 20px;
    height: 2px;
    background-color: var(--color-primary);
    border-radius: 1px;
    transition: width var(--navbar-transition-duration) var(--navbar-transition-easing);
}

/* Slightly shorter underline when scrolled */
.navbar[data-scrolled="true"] .navbar__link--active::after {
    width: 16px;
}


/* ============================================
   CTA BUTTON
   Primary action button on the right
   Shrinks proportionally with navbar on scroll
   ============================================ */
.navbar__actions {
    display: flex;
    align-items: center;
}

.navbar__cta {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: var(--cta-padding-y) var(--cta-padding-x);
    font-family: 'DM Sans', sans-serif;
    font-size: var(--cta-font-size);
    font-weight: 600;
    color: #ffffff;
    background-color: var(--color-primary);
    border: none;
    border-radius: 999px;
    text-decoration: none;
    cursor: pointer;
    box-shadow: 0 2px 8px rgba(91, 58, 255, 0.25);
    white-space: nowrap;
    /* 
       Match navbar transition timing for synchronized shrinking
       Padding and font-size animate together with logo and navbar
    */
    transition: 
        padding var(--navbar-transition-duration) var(--navbar-transition-easing),
        font-size var(--navbar-transition-duration) var(--navbar-transition-easing),
        background-color 0.2s ease,
        transform 0.2s ease,
        box-shadow 0.2s ease;
    will-change: padding, font-size;
}

/* Smaller CTA button when scrolled - proportional to navbar shrink */
.navbar[data-scrolled="true"] .navbar__cta {
    padding: var(--cta-padding-y-scrolled) var(--cta-padding-x-scrolled);
    font-size: var(--cta-font-size-scrolled);
}

.navbar__cta:hover {
    background-color: var(--color-primary-hover);
    transform: translateY(-2px);
    box-shadow: 0 4px 16px rgba(91, 58, 255, 0.35);
    color: #ffffff;
}

.navbar__cta:active {
    transform: translateY(0);
    box-shadow: 0 2px 8px rgba(91, 58, 255, 0.25);
}

/* Full-width variant for mobile drawer - doesn't shrink */
.navbar__cta--full {
    width: 100%;
    padding: 1rem 1.5rem !important;
    font-size: 1rem !important;
}


/* ============================================
   MOBILE TOGGLE BUTTON (Hamburger)
   Hidden on desktop, visible on mobile
   ============================================ */
.navbar__toggle {
    display: none;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    width: 44px;
    height: 44px;
    padding: 0;
    background: transparent;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    transition: var(--transition-fast);
}

.navbar__toggle:hover {
    background-color: rgba(91, 58, 255, 0.06);
}

.navbar__toggle:focus-visible {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
}

/* Hamburger lines */
.navbar__toggle span {
    display: block;
    width: 22px;
    height: 2px;
    background-color: var(--color-text);
    border-radius: 2px;
    transition: var(--transition-smooth);
    margin: 3px 0;
}

/* Animated X when active */
.navbar__toggle--active span:nth-child(1) {
    transform: rotate(45deg) translate(4px, 4px);
}

.navbar__toggle--active span:nth-child(2) {
    opacity: 0;
    transform: scaleX(0);
}

.navbar__toggle--active span:nth-child(3) {
    transform: rotate(-45deg) translate(4px, -4px);
}


/* ============================================
   MOBILE DRAWER OVERLAY
   Semi-transparent backdrop when drawer is open
   ============================================ */
.navbar__overlay {
    position: fixed;
    inset: 0;
    background-color: var(--overlay-bg);
    opacity: 0;
    visibility: hidden;
    transition: var(--transition-smooth);
    z-index: 999;
    /* Prevent scroll when overlay is visible */
    pointer-events: none;
}

.navbar__overlay--visible {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
}


/* ============================================
   MOBILE SLIDE-IN DRAWER
   Slides in from the right side
   ============================================ */
.navbar__drawer {
    position: fixed;
    top: 0;
    right: 0;
    width: 80%;
    max-width: var(--drawer-width);
    height: 100vh;
    height: 100dvh; /* Dynamic viewport height for mobile browsers */
    background: var(--drawer-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    transform: translateX(100%);
    transition: transform 0.35s cubic-bezier(0.4, 0, 0.2, 1);
    z-index: 1001;
    display: flex;
    flex-direction: column;
    box-shadow: -8px 0 32px rgba(0, 0, 0, 0.1);
    overflow-y: auto;
    overscroll-behavior: contain;
}

.navbar__drawer--open {
    transform: translateX(0);
}

/* Drawer header with logo and close button */
.navbar__drawer-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.25rem 1.5rem;
    border-bottom: 1px solid rgba(0, 0, 0, 0.06);
}

.navbar__drawer-logo img {
    height: 40px;
    width: auto;
}

/* Close button */
.navbar__drawer-close {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    padding: 0;
    background: transparent;
    border: none;
    border-radius: 8px;
    color: var(--color-text);
    cursor: pointer;
    transition: var(--transition-fast);
}

.navbar__drawer-close:hover {
    background-color: rgba(91, 58, 255, 0.06);
    color: var(--color-primary);
}

.navbar__drawer-close:focus-visible {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
}

/* Drawer navigation links */
.navbar__drawer-nav {
    display: flex;
    flex-direction: column;
    padding: 1.5rem;
    gap: 0.5rem;
    flex-grow: 1;
}

.navbar__drawer-link {
    display: flex;
    align-items: center;
    padding: 1rem 1.25rem;
    font-family: 'DM Sans', sans-serif;
    font-size: 1.1rem;
    font-weight: 500;
    color: var(--color-text);
    text-decoration: none;
    border-radius: 12px;
    transition: var(--transition-fast);
}

.navbar__drawer-link:hover {
    background-color: rgba(91, 58, 255, 0.06);
    color: var(--color-primary);
}

.navbar__drawer-link--active {
    color: var(--color-primary);
    font-weight: 600;
    background-color: rgba(91, 58, 255, 0.08);
}

/* Drawer CTA button container */
.navbar__drawer-cta {
    padding: 1.5rem;
    border-top: 1px solid rgba(0, 0, 0, 0.06);
    margin-top: auto;
}


/* ============================================
   BODY SCROLL LOCK
   Prevents background scrolling when drawer is open
   ============================================ */
body.navbar-drawer-open {
    overflow: hidden;
    position: fixed;
    width: 100%;
    /* Store scroll position to restore later */
}

/* ============================================
   HIDE NAVBAR LOGO WHEN DRAWER IS OPEN
   Prevents the navbar logo from showing through
   or alongside the drawer's logo, avoiding the
   visual duplication issue on mobile.
   ============================================ */
body.navbar-drawer-open .navbar__logo {
    /* Make the navbar logo invisible when drawer is open */
    opacity: 0;
    visibility: hidden;
    /* Quick transition for smooth hide/show */
    transition: opacity 0.15s ease, visibility 0.15s ease;
}

/* Ensure navbar logo is visible when drawer is closed */
.navbar__logo {
    /* Default visible state with transition for smooth effect */
    opacity: 1;
    visibility: visible;
    transition: opacity 0.15s ease, visibility 0.15s ease;
}


/* ============================================
   RESPONSIVE BREAKPOINTS
   Uses CSS variable overrides to maintain
   smooth transitions at all screen sizes
   ============================================ */

/* Tablet - slightly compact nav */
@media (max-width: 1024px) {
    :root {
        /* Slightly smaller sizes for tablet */
        --logo-height: 44px;
        --logo-height-scrolled: 36px;
        --cta-padding-y: 0.6rem;
        --cta-padding-x: 1.4rem;
        --cta-padding-y-scrolled: 0.45rem;
        --cta-padding-x-scrolled: 1.1rem;
    }
    
    .navbar__container {
        padding: 0 1.5rem;
        gap: 1.5rem;
    }
    
    .navbar__link {
        padding: 0.45rem 0.8rem;
        font-size: 0.9rem;
    }
    
    .navbar[data-scrolled="true"] .navbar__link {
        padding: 0.35rem 0.7rem;
        font-size: 0.85rem;
    }
}

/* Mobile - show hamburger, hide desktop nav */
@media (max-width: 768px) {
    :root {
        /* Mobile-specific sizes */
        --navbar-padding: 1rem;
        --navbar-padding-scrolled: 0.65rem;
        --logo-height: 40px;
        --logo-height-scrolled: 34px;
    }
    
    .navbar__container {
        grid-template-columns: 1fr auto;
        padding: 0 1rem;
    }
    
    /* Hide desktop navigation on mobile */
    .navbar__nav {
        display: none;
    }
    
    /* Hide desktop CTA on mobile */
    .navbar__actions {
        display: none;
    }
    
    /* Show hamburger toggle on mobile */
    .navbar__toggle {
        display: flex;
    }
}

/* Small mobile */
@media (max-width: 480px) {
    :root {
        --logo-height: 36px;
        --logo-height-scrolled: 30px;
    }
    
    .navbar__container {
        padding: 0 0.75rem;
    }
    
    .navbar__drawer {
        width: 85%;
    }
    
    .navbar__drawer-link {
        font-size: 1rem;
        padding: 0.875rem 1rem;
    }
}


/* ============================================
   ACCESSIBILITY - REDUCED MOTION
   Respects user preference for less motion
   ============================================ */
@media (prefers-reduced-motion: reduce) {
    :root {
        --navbar-transition-duration: 0s;
    }
    
    .navbar,
    .navbar__logo img,
    .navbar__link,
    .navbar__cta,
    .navbar__toggle,
    .navbar__toggle span,
    .navbar__overlay,
    .navbar__drawer,
    .navbar__drawer-link,
    .navbar__drawer-close {
        transition: none !important;
    }
}


/* ============================================
   FOCUS STYLES FOR KEYBOARD NAVIGATION
   ============================================ */
.navbar__link:focus-visible,
.navbar__cta:focus-visible,
.navbar__logo:focus-visible,
.navbar__drawer-link:focus-visible {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
}


/* ============================================
   PRINT STYLES
   Hide navbar when printing
   ============================================ */
@media print {
    .navbar,
    .navbar__overlay,
    .navbar__drawer {
        display: none !important;
    }
}