/* ============================================================
   Navigation Drawer — Slide-out primary navigation
   Uses design tokens from base.css exclusively.
   ============================================================ */

/* --- Backdrop --- */
.nav-drawer-backdrop {
    position: fixed;
    inset: 0;
    z-index: 1999;
    background: rgba(0, 0, 0, 0.35);
    backdrop-filter: blur(6px);
    -webkit-backdrop-filter: blur(6px);
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.28s ease, visibility 0.28s ease;
}
.nav-drawer-backdrop.is-visible {
    opacity: 1;
    visibility: visible;
}

/* --- Drawer Container --- */
.nav-drawer {
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    width: 380px;
    max-width: 88vw;
    z-index: 2000;
    display: flex;
    flex-direction: column;
    background-color: var(--background-color, #ffffff);
    box-shadow: var(--shadow-xl), 0 0 80px rgba(var(--accent-color-rgb, 37, 99, 235), 0.06);
    border-radius: 0 var(--radius-xl, 16px) var(--radius-xl, 16px) 0;
    transform: translateX(-105%);
    transition: transform 0.32s cubic-bezier(0.32, 0.72, 0, 1);
    will-change: transform;
    overflow: hidden;
    outline: none;
}
.nav-drawer.is-open {
    transform: translateX(0);
}

/* --- Drawer Header — gradient accent band --- */
.nav-drawer__header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-6, 1.5rem) var(--space-8, 2rem);
    flex-shrink: 0;
    min-height: 72px;
    background: linear-gradient(135deg,
        rgba(var(--accent-color-rgb, 37, 99, 235), 0.07) 0%,
        rgba(var(--accent-color-rgb, 37, 99, 235), 0.02) 100%);
    border-bottom: 1px solid rgba(var(--accent-color-rgb, 37, 99, 235), 0.1);
    position: relative;
}
/* Subtle decorative accent line at very top */
.nav-drawer__header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg,
        var(--accent-color, #2563eb),
        var(--editorial-accent, #c45d3e),
        var(--accent-color, #2563eb));
    border-radius: 0 0 2px 0;
}

.nav-drawer__user {
    display: flex;
    align-items: center;
    gap: var(--space-3, 0.75rem);
    text-decoration: none;
    color: var(--text-color, #1a1a1a);
    border-radius: var(--radius-md, 8px);
    padding: var(--space-2, 0.5rem);
    transition: background-color 0.15s ease;
}
.nav-drawer__user:hover {
    background-color: rgba(var(--accent-color-rgb, 37, 99, 235), 0.06);
}

.nav-drawer__avatar {
    width: 44px;
    height: 44px;
    border-radius: var(--radius-full, 9999px);
    object-fit: cover;
    flex-shrink: 0;
    border: 2px solid rgba(var(--accent-color-rgb, 37, 99, 235), 0.2);
}
.nav-drawer__avatar--placeholder {
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--accent-color, #2563eb), var(--accent-hover, #1d4ed8));
    color: #fff;
    font-weight: 700;
    font-size: var(--text-md, 1.125rem);
    font-family: var(--font-sans);
    border: none;
}

.nav-drawer__username {
    font-weight: 600;
    font-size: var(--text-md, 1.125rem);
    font-family: var(--font-sans);
    max-width: 200px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.nav-drawer__brand {
    display: flex;
    align-items: center;
}
.nav-drawer__logo {
    height: 36px;
    width: auto;
}

.nav-drawer__close {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    border: none;
    background: transparent;
    border-radius: var(--radius-md, 8px);
    color: var(--text-secondary, #525252);
    cursor: pointer;
    flex-shrink: 0;
    transition: background-color 0.15s ease, color 0.15s ease;
}
.nav-drawer__close:hover {
    background-color: rgba(var(--accent-color-rgb, 37, 99, 235), 0.08);
    color: var(--accent-color, #2563eb);
}
.nav-drawer__close:focus-visible {
    outline: 2px solid var(--accent-color, #2563eb);
    outline-offset: -2px;
}

/* --- Drawer Body (scrollable) --- */
.nav-drawer__body {
    flex: 1;
    overflow-y: auto;
    overflow-x: hidden;
    overscroll-behavior: contain;
    padding: var(--space-4, 1rem) 0;
    -webkit-overflow-scrolling: touch;
}

/* --- Quick Actions section --- */
.nav-drawer__section--quick {
    padding: var(--space-3, 0.75rem) var(--space-8, 2rem) var(--space-5, 1.25rem);
    border-bottom: 1px solid var(--border-color, #e5e7eb);
    margin-bottom: var(--space-2, 0.5rem);
}

/* Generate a Recipe CTA — gradient accent button */
.nav-drawer__cta {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2, 0.5rem);
    width: 100%;
    padding: var(--space-3, 0.75rem) var(--space-4, 1rem);
    margin-bottom: var(--space-3, 0.75rem);
    background: linear-gradient(135deg, var(--accent-color, #2563eb) 0%, #4f46e5 100%);
    color: #fff;
    font-weight: 600;
    font-size: var(--text-base, 1rem);
    font-family: var(--font-sans);
    text-decoration: none;
    border-radius: var(--radius-md, 8px);
    border: none;
    cursor: pointer;
    transition: box-shadow 0.25s ease, transform 0.12s ease;
    box-shadow: 0 3px 12px rgba(var(--accent-color-rgb, 37, 99, 235), 0.3);
}
.nav-drawer__cta:hover {
    box-shadow: 0 6px 24px rgba(var(--accent-color-rgb, 37, 99, 235), 0.5);
    transform: translateY(-1px);
}
.nav-drawer__cta:active {
    transform: translateY(0) scale(0.98);
    box-shadow: 0 2px 8px rgba(var(--accent-color-rgb, 37, 99, 235), 0.3);
}
.nav-drawer__cta i {
    font-size: var(--text-lg, 1.25rem);
}

/* Search link */
.nav-drawer__link--search {
    display: flex;
    align-items: center;
    gap: var(--space-2, 0.5rem);
    padding: var(--space-3, 0.75rem) var(--space-4, 1rem);
    color: var(--text-color, #1a1a1a);
    text-decoration: none;
    border-radius: var(--radius-md, 8px);
    font-weight: 500;
    font-size: var(--text-base, 1rem);
    font-family: var(--font-sans);
    border: 1px solid var(--border-color, #e5e7eb);
    transition: background-color 0.15s ease, border-color 0.15s ease;
}
.nav-drawer__link--search:hover {
    background-color: var(--surface-tertiary, #f3f4f6);
    border-color: var(--accent-color, #2563eb);
}
.nav-drawer__link--search i {
    color: var(--text-muted, #9ca3af);
    width: 22px;
    text-align: center;
    transition: color 0.15s ease;
}
.nav-drawer__link--search:hover i {
    color: var(--accent-color, #2563eb);
}

/* --- Sections --- */
.nav-drawer__section {
    padding: var(--space-3, 0.75rem) 0;
}
.nav-drawer__section + .nav-drawer__section {
    border-top: 1px solid var(--border-light, #f3f4f6);
}

/* Section toggle header */
.nav-drawer__section-toggle {
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
    padding: var(--space-2, 0.5rem) var(--space-8, 2rem);
    border: none;
    background: transparent;
    cursor: pointer;
    color: var(--text-muted, #9ca3af);
    font-family: var(--font-sans);
    font-size: 0.7rem;
    font-weight: 700;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    transition: color 0.15s ease;
}
.nav-drawer__section-toggle:hover {
    color: var(--accent-color, #2563eb);
}
.nav-drawer__section-toggle:focus-visible {
    outline: 2px solid var(--accent-color, #2563eb);
    outline-offset: -2px;
}

.nav-drawer__chevron {
    font-size: 0.55rem;
    transition: transform 0.25s ease;
}
.nav-drawer__section-toggle[aria-expanded="false"] .nav-drawer__chevron {
    transform: rotate(-90deg);
}

/* Section links list */
.nav-drawer__links {
    list-style: none;
    margin: 0;
    padding: var(--space-1, 0.25rem) 0 0 0;
    overflow: hidden;
    transition: max-height 0.28s ease, opacity 0.22s ease;
}
.nav-drawer__links[hidden] {
    display: block !important;
    max-height: 0;
    opacity: 0;
    pointer-events: none;
}

/* Nav links — more generous padding */
.nav-drawer__links a {
    display: flex;
    align-items: center;
    gap: var(--space-4, 1rem);
    padding: var(--space-3, 0.75rem) var(--space-8, 2rem);
    text-decoration: none;
    color: var(--text-color, #1a1a1a);
    font-weight: 500;
    font-size: var(--text-base, 1rem);
    font-family: var(--font-sans);
    min-height: 48px;
    border-radius: 0;
    position: relative;
    transition: background-color 0.15s ease, color 0.15s ease;
}
.nav-drawer__links a:hover {
    background-color: rgba(var(--accent-color-rgb, 37, 99, 235), 0.04);
    color: var(--accent-color, #2563eb);
}
.nav-drawer__links a:focus-visible {
    outline: 2px solid var(--accent-color, #2563eb);
    outline-offset: -2px;
}

/* Icons in links — colored icon backgrounds for flair */
.nav-drawer__links a i {
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-md, 8px);
    font-size: var(--text-sm, 0.8rem);
    flex-shrink: 0;
    transition: background-color 0.15s ease, color 0.15s ease;
    background-color: var(--surface-tertiary, #f3f4f6);
    color: var(--text-secondary, #525252);
}
.nav-drawer__links a:hover i {
    background-color: rgba(var(--accent-color-rgb, 37, 99, 235), 0.1);
    color: var(--accent-color, #2563eb);
}

/* Per-section icon accent tints */
[data-drawer-section="discover"] .nav-drawer__links a i {
    color: var(--accent-color, #2563eb);
    background-color: rgba(var(--accent-color-rgb, 37, 99, 235), 0.08);
}
[data-drawer-section="create"] .nav-drawer__links a i {
    color: var(--editorial-accent, #c45d3e);
    background-color: rgba(196, 93, 62, 0.08);
}
[data-drawer-section="kitchen"] .nav-drawer__links a i {
    color: var(--color-success, #16a34a);
    background-color: rgba(22, 163, 74, 0.08);
}
[data-drawer-section="learn"] .nav-drawer__links a i {
    color: var(--color-warning, #f59e0b);
    background-color: rgba(245, 158, 11, 0.08);
}

/* Active link indicator */
.nav-drawer__links a.active,
.nav-drawer__links a[aria-current="page"] {
    color: var(--accent-color, #2563eb);
    font-weight: 600;
    background-color: rgba(var(--accent-color-rgb, 37, 99, 235), 0.06);
}
.nav-drawer__links a.active::before,
.nav-drawer__links a[aria-current="page"]::before {
    content: '';
    position: absolute;
    left: 0;
    top: var(--space-2, 0.5rem);
    bottom: var(--space-2, 0.5rem);
    width: 3px;
    border-radius: 0 3px 3px 0;
    background: linear-gradient(180deg, var(--accent-color, #2563eb), #4f46e5);
}
.nav-drawer__links a.active i,
.nav-drawer__links a[aria-current="page"] i {
    color: var(--accent-color, #2563eb);
    background-color: rgba(var(--accent-color-rgb, 37, 99, 235), 0.12);
}

/* --- Drawer Footer --- */
.nav-drawer__footer {
    flex-shrink: 0;
    padding: var(--space-5, 1.25rem) var(--space-6, 1.5rem);
    border-top: 1px solid var(--border-color, #e5e7eb);
    background: linear-gradient(180deg,
        transparent 0%,
        rgba(var(--accent-color-rgb, 37, 99, 235), 0.02) 100%);
    display: flex;
    flex-direction: column;
    gap: var(--space-1, 0.25rem);
}

.nav-drawer__footer-link {
    display: flex;
    align-items: center;
    gap: var(--space-3, 0.75rem);
    padding: var(--space-3, 0.75rem) var(--space-4, 1rem);
    text-decoration: none;
    color: var(--text-color, #1a1a1a);
    font-weight: 500;
    font-size: var(--text-base, 1rem);
    font-family: var(--font-sans);
    min-height: 44px;
    border-radius: var(--radius-md, 8px);
    transition: background-color 0.15s ease;
}
.nav-drawer__footer-link:hover {
    background-color: rgba(var(--accent-color-rgb, 37, 99, 235), 0.05);
}
.nav-drawer__footer-link:focus-visible {
    outline: 2px solid var(--accent-color, #2563eb);
    outline-offset: -2px;
}
.nav-drawer__footer-link i {
    width: 20px;
    text-align: center;
    font-size: var(--text-sm, 0.8rem);
    color: var(--text-muted, #9ca3af);
}

/* Logout link */
.nav-drawer__footer-link--logout {
    color: var(--color-error, #dc2626);
    margin-top: var(--space-2, 0.5rem);
}
.nav-drawer__footer-link--logout:hover {
    background-color: rgba(220, 38, 38, 0.06);
}
.nav-drawer__footer-link--logout i {
    color: var(--color-error, #dc2626);
}

/* Auth buttons (guest state) */
.nav-drawer__auth-btn {
    width: 100%;
    padding: var(--space-4, 1rem) var(--space-5, 1.25rem);
    border-radius: var(--radius-lg, 12px);
    font-weight: 600;
    font-size: var(--text-base, 1rem);
    font-family: var(--font-sans);
    cursor: pointer;
    transition: background-color 0.2s ease, box-shadow 0.2s ease, transform 0.12s ease;
    text-align: center;
    border: none;
}
.nav-drawer__auth-btn--primary {
    background: linear-gradient(135deg, var(--accent-color, #2563eb) 0%, #4f46e5 100%);
    color: #fff;
    margin-bottom: var(--space-2, 0.5rem);
    box-shadow: 0 4px 16px rgba(var(--accent-color-rgb, 37, 99, 235), 0.3);
}
.nav-drawer__auth-btn--primary:hover {
    box-shadow: 0 6px 20px rgba(var(--accent-color-rgb, 37, 99, 235), 0.45);
    transform: translateY(-1px);
}
.nav-drawer__auth-btn--secondary {
    background-color: transparent;
    color: var(--accent-color, #2563eb);
    border: 1.5px solid rgba(var(--accent-color-rgb, 37, 99, 235), 0.3);
}
.nav-drawer__auth-btn--secondary:hover {
    background-color: rgba(var(--accent-color-rgb, 37, 99, 235), 0.06);
    border-color: var(--accent-color, #2563eb);
}

/* --- Hamburger Icon Morph --- */
.nav-hamburger {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    width: 44px;
    height: 44px;
    border: none;
    background: transparent;
    cursor: pointer;
    padding: 0;
    position: relative;
    z-index: 2001;
    border-radius: var(--radius-md, 8px);
    transition: background-color 0.15s ease;
}
.nav-hamburger:hover {
    background-color: var(--surface-tertiary, #f3f4f6);
}
.nav-hamburger:focus-visible {
    outline: 2px solid var(--accent-color, #2563eb);
    outline-offset: -2px;
}

.nav-hamburger__bar {
    display: block;
    width: 22px;
    height: 2px;
    background-color: var(--text-color, #1a1a1a);
    border-radius: 2px;
    transition: transform 0.3s cubic-bezier(0.32, 0.72, 0, 1),
                opacity 0.2s ease,
                width 0.3s cubic-bezier(0.32, 0.72, 0, 1);
    transform-origin: center;
}
.nav-hamburger__bar + .nav-hamburger__bar {
    margin-top: 5px;
}

/* Morphed to X */
.nav-hamburger[aria-expanded="true"] .nav-hamburger__bar:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
}
.nav-hamburger[aria-expanded="true"] .nav-hamburger__bar:nth-child(2) {
    opacity: 0;
    width: 0;
}
.nav-hamburger[aria-expanded="true"] .nav-hamburger__bar:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
}

/* --- Stagger animation for links on open --- */
.nav-drawer.is-open .nav-drawer__section {
    animation: drawerSectionFade 0.35s ease both;
}
.nav-drawer.is-open .nav-drawer__section:nth-child(1) { animation-delay: 0.06s; }
.nav-drawer.is-open .nav-drawer__section:nth-child(2) { animation-delay: 0.1s; }
.nav-drawer.is-open .nav-drawer__section:nth-child(3) { animation-delay: 0.14s; }
.nav-drawer.is-open .nav-drawer__section:nth-child(4) { animation-delay: 0.18s; }
.nav-drawer.is-open .nav-drawer__section:nth-child(5) { animation-delay: 0.22s; }
.nav-drawer.is-open .nav-drawer__section:nth-child(6) { animation-delay: 0.26s; }

@keyframes drawerSectionFade {
    from {
        opacity: 0;
        transform: translateX(-14px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

/* Footer stagger */
.nav-drawer.is-open .nav-drawer__footer {
    animation: drawerSectionFade 0.35s ease 0.2s both;
}

/* --- Body scroll lock --- */
html.nav-drawer-open {
    overflow: hidden;
}

/* --- Responsive --- */
@media (max-width: 420px) {
    .nav-drawer {
        max-width: 92vw;
    }
}

@media (min-width: 768px) {
    .nav-drawer {
        width: 400px;
    }
}

/* --- Dark Mode --- */
[data-theme="dark"] .nav-drawer {
    background-color: var(--background-color, #121212);
    box-shadow: 0 16px 48px rgba(0, 0, 0, 0.5), 0 0 60px rgba(var(--accent-color-rgb, 37, 99, 235), 0.05);
}
[data-theme="dark"] .nav-drawer__header {
    background: linear-gradient(135deg,
        rgba(var(--accent-color-rgb, 37, 99, 235), 0.12) 0%,
        rgba(var(--accent-color-rgb, 37, 99, 235), 0.04) 100%);
    border-bottom-color: rgba(var(--accent-color-rgb, 37, 99, 235), 0.15);
}
[data-theme="dark"] .nav-drawer-backdrop {
    background: rgba(0, 0, 0, 0.55);
}
[data-theme="dark"] .nav-drawer__cta {
    box-shadow: 0 4px 16px rgba(var(--accent-color-rgb, 37, 99, 235), 0.2);
}
[data-theme="dark"] .nav-drawer__logo {
    filter: invert(1) brightness(1.2);
}
[data-theme="dark"] .nav-hamburger__bar {
    background-color: var(--text-color, #eee);
}
[data-theme="dark"] .nav-drawer__links a i {
    background-color: rgba(255, 255, 255, 0.06);
}
[data-theme="dark"] [data-drawer-section="discover"] .nav-drawer__links a i {
    background-color: rgba(var(--accent-color-rgb, 37, 99, 235), 0.15);
}
[data-theme="dark"] [data-drawer-section="create"] .nav-drawer__links a i {
    background-color: rgba(196, 93, 62, 0.15);
}
[data-theme="dark"] [data-drawer-section="kitchen"] .nav-drawer__links a i {
    background-color: rgba(22, 163, 74, 0.15);
}
[data-theme="dark"] [data-drawer-section="learn"] .nav-drawer__links a i {
    background-color: rgba(245, 158, 11, 0.15);
}

@media (prefers-color-scheme: dark) {
    :root:not([data-theme]) .nav-drawer {
        background-color: var(--background-color, #121212);
        box-shadow: 0 16px 48px rgba(0, 0, 0, 0.5), 0 0 60px rgba(var(--accent-color-rgb, 37, 99, 235), 0.05);
    }
    :root:not([data-theme]) .nav-drawer__header {
        background: linear-gradient(135deg,
            rgba(var(--accent-color-rgb, 37, 99, 235), 0.12) 0%,
            rgba(var(--accent-color-rgb, 37, 99, 235), 0.04) 100%);
        border-bottom-color: rgba(var(--accent-color-rgb, 37, 99, 235), 0.15);
    }
    :root:not([data-theme]) .nav-drawer-backdrop {
        background: rgba(0, 0, 0, 0.55);
    }
    :root:not([data-theme]) .nav-drawer__cta {
        box-shadow: 0 4px 16px rgba(var(--accent-color-rgb, 37, 99, 235), 0.2);
    }
    :root:not([data-theme]) .nav-drawer__logo {
        filter: invert(1) brightness(1.2);
    }
    :root:not([data-theme]) .nav-hamburger__bar {
        background-color: var(--text-color, #eee);
    }
    :root:not([data-theme]) .nav-drawer__links a i {
        background-color: rgba(255, 255, 255, 0.06);
    }
}

/* --- Print: hide drawer entirely --- */
@media print {
    .nav-drawer,
    .nav-drawer-backdrop,
    .nav-hamburger {
        display: none !important;
    }
}