/* ==========================================================================
   Notion Productivity Hub — Shared Design System
   Used by every subtool. Provides design tokens, base layout, animated nav,
   buttons, scroll-to-top, reveal animations and utility classes.
   ========================================================================== */

:root {
    /* Brand gradient */
    --grad-start: #7C3AED;
    --grad-mid:   #A855F7;
    --grad-end:   #EC4899;
    --grad-accent:#06B6D4;

    /* Surface */
    --bg:         #FAFAFB;
    --bg-soft:    #F1F0FB;
    --bg-elevated:#FFFFFF;
    --bg-dark:    #0F0F1A;
    --bg-dark-2:  #1A1830;
    --nav-bg:     rgba(255, 255, 255, 0.75);
    --nav-bg-solid: #ffffff;

    /* Text */
    --text:       #1A1530;
    --text-soft:  #5C5878;
    --text-muted: #8C88A8;
    --text-invert:#FAFAFB;

    /* Lines & shadows */
    --border:     rgba(124, 58, 237, 0.12);
    --border-strong: rgba(124, 58, 237, 0.25);
    --shadow-sm:  0 2px 8px rgba(124, 58, 237, 0.08);
    --shadow-md:  0 8px 24px rgba(124, 58, 237, 0.12);
    --shadow-lg:  0 18px 48px rgba(124, 58, 237, 0.18);
    --shadow-glow:0 0 32px rgba(168, 85, 247, 0.35);

    /* Status */
    --success:    #10B981;
    --danger:     #EF4444;
    --warning:    #F59E0B;

    /* Motion */
    --ease:       cubic-bezier(0.22, 1, 0.36, 1);
    --t-fast:     0.2s;
    --t-med:      0.4s;
    --t-slow:     0.7s;

    /* Layout */
    --radius-sm:  8px;
    --radius:     14px;
    --radius-lg:  22px;
    --radius-xl:  32px;
    --nav-h:      4rem;
    --container:  1200px;
}

/* ==========================================================================
   DARK THEME
   ========================================================================== */
html[data-theme="dark"] {
    --bg:         #0B0B14;
    --bg-soft:    #15131F;
    --bg-elevated:#1A1830;
    --nav-bg:     rgba(15, 15, 26, 0.75);
    --nav-bg-solid:#15131F;

    --text:       #F5F3FF;
    --text-soft:  #B0AECF;
    --text-muted: #8A88A8;

    --border:     rgba(168, 85, 247, 0.18);
    --border-strong: rgba(168, 85, 247, 0.35);
    --shadow-sm:  0 2px 8px rgba(0, 0, 0, 0.4);
    --shadow-md:  0 8px 24px rgba(0, 0, 0, 0.45);
    --shadow-lg:  0 18px 48px rgba(0, 0, 0, 0.55);
    --shadow-glow:0 0 40px rgba(168, 85, 247, 0.4);

    color-scheme: dark;
}
html[data-theme="dark"] .bg-blob { opacity: 0.45; }
html[data-theme="dark"] .notion-nav {
    background: var(--nav-bg);
}
html[data-theme="dark"] .notion-nav__menu {
    background: var(--nav-bg-solid) !important;
}
html[data-theme="dark"] .feature-card {
    background: var(--bg-elevated);
}
html[data-theme="dark"] .feature-card__icon {
    box-shadow: 0 8px 20px rgba(124, 58, 237, 0.5);
}
html[data-theme="dark"] .hero__card,
html[data-theme="dark"] .notion-glass {
    background: rgba(26, 24, 48, 0.8);
    border-color: rgba(168, 85, 247, 0.25);
}
html[data-theme="dark"] .notion-toast {
    background: var(--bg-elevated);
    color: var(--text);
}
html[data-theme="dark"] .tpl {
    background: var(--bg-elevated);
}
html[data-theme="dark"] .tpl--feature {
    background: linear-gradient(135deg, rgba(124, 58, 237, 0.18), rgba(236, 72, 153, 0.15));
}
html[data-theme="dark"] img:not(.tpl__preview):not(.notion-nav__brand-mark img) {
    filter: brightness(0.92) contrast(1.02);
}
html[data-theme="dark"] .section-figure img {
    filter: brightness(0.9) contrast(1.05);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html { scroll-behavior: smooth; }

body {
    font-family: 'Poppins', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    color: var(--text);
    background: var(--bg);
    min-height: 100vh;
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
}

/* Animated background blobs (added by JS to <body>) */
.bg-blob {
    position: fixed;
    border-radius: 50%;
    filter: blur(90px);
    opacity: 0.35;
    pointer-events: none;
    z-index: -1;
    animation: float 20s var(--ease) infinite;
}
.bg-blob.b1 { width: 400px; height: 400px; top: -100px; left: -100px;
    background: radial-gradient(circle, var(--grad-start), transparent 70%); }
.bg-blob.b2 { width: 500px; height: 500px; bottom: -150px; right: -150px;
    background: radial-gradient(circle, var(--grad-end), transparent 70%);
    animation-delay: -7s; }
.bg-blob.b3 { width: 350px; height: 350px; top: 40%; right: 20%;
    background: radial-gradient(circle, var(--grad-accent), transparent 70%);
    animation-delay: -14s; }

@keyframes float {
    0%, 100% { transform: translate(0, 0) scale(1); }
    33%      { transform: translate(40px, -30px) scale(1.05); }
    66%      { transform: translate(-30px, 40px) scale(0.95); }
}

/* Skip-to-content link (a11y) */
.skip-link {
    position: absolute;
    left: -9999px;
    top: 0;
    background: var(--grad-start);
    color: white;
    padding: 0.75rem 1.25rem;
    border-radius: var(--radius-sm);
    z-index: 1000;
    font-weight: 600;
}
.skip-link:focus {
    left: 1rem;
    top: 1rem;
}

/* ==========================================================================
   NAVIGATION BAR
   ========================================================================== */
.notion-nav {
    position: sticky;
    top: 0;
    z-index: 100;
    backdrop-filter: saturate(180%) blur(20px);
    -webkit-backdrop-filter: saturate(180%) blur(20px);
    background: var(--nav-bg);
    border-bottom: 1px solid var(--border);
    transition: background var(--t-fast) var(--ease), box-shadow var(--t-fast) var(--ease);
}
.notion-nav.scrolled {
    box-shadow: var(--shadow-md);
}

.notion-nav__inner {
    max-width: var(--container);
    margin: 0 auto;
    height: var(--nav-h);
    padding: 0 1.5rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
}

.notion-nav__brand {
    display: inline-flex;
    align-items: center;
    gap: 0.6rem;
    text-decoration: none;
    font-weight: 700;
    font-size: 1.25rem;
    color: var(--text);
    transition: transform var(--t-fast) var(--ease);
}
.notion-nav__brand:hover { transform: scale(1.04); }
.notion-nav__brand-mark {
    width: 36px;
    height: 36px;
    border-radius: 10px;
    background: linear-gradient(135deg, var(--grad-start), var(--grad-end));
    display: grid;
    place-items: center;
    color: white;
    font-weight: 800;
    box-shadow: var(--shadow-sm);
    transition: transform var(--t-fast) var(--ease);
}
.notion-nav__brand:hover .notion-nav__brand-mark { transform: rotate(-8deg) scale(1.1); }
.notion-nav__brand-text {
    background: linear-gradient(135deg, var(--grad-start), var(--grad-end));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.notion-nav__menu {
    display: flex;
    align-items: center;
    gap: 0.25rem;
    list-style: none;
    margin-left: auto;
}

.notion-nav__item { position: relative; }
.notion-nav__link {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    color: var(--text);
    text-decoration: none;
    font-weight: 500;
    font-size: 0.95rem;
    padding: 0.6rem 0.9rem;
    border-radius: var(--radius-sm);
    transition: all var(--t-fast) var(--ease);
    position: relative;
}
.notion-nav__link::after {
    content: '';
    position: absolute;
    bottom: 0.35rem;
    left: 50%;
    width: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--grad-start), var(--grad-end));
    transition: all var(--t-fast) var(--ease);
    transform: translateX(-50%);
    border-radius: 2px;
}
.notion-nav__link:hover,
.notion-nav__link:focus-visible {
    color: var(--grad-start);
    background: rgba(124, 58, 237, 0.06);
    outline: none;
}
.notion-nav__link:hover::after,
.notion-nav__item:focus-within .notion-nav__link::after {
    width: calc(100% - 1.8rem);
}

.notion-nav__dropdown {
    position: absolute;
    top: calc(100% + 0.4rem);
    left: 50%;
    transform: translateX(-50%) translateY(-8px);
    min-width: 220px;
    background: var(--bg-elevated);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 0.5rem;
    list-style: none;
    box-shadow: var(--shadow-lg);
    opacity: 0;
    visibility: hidden;
    transition: all var(--t-fast) var(--ease);
}
.notion-nav__item:hover .notion-nav__dropdown,
.notion-nav__item:focus-within .notion-nav__dropdown {
    opacity: 1;
    visibility: visible;
    transform: translateX(-50%) translateY(0);
}
.notion-nav__dropdown a {
    display: flex;
    align-items: center;
    gap: 0.7rem;
    padding: 0.65rem 0.9rem;
    color: var(--text);
    text-decoration: none;
    font-size: 0.92rem;
    font-weight: 500;
    border-radius: var(--radius-sm);
    transition: all var(--t-fast) var(--ease);
}
.notion-nav__dropdown a i {
    width: 22px;
    flex-shrink: 0;
    text-align: center;
    font-size: 0.95rem;
    color: var(--grad-start);
    transition: transform var(--t-fast) var(--ease);
}
.notion-nav__dropdown a:hover,
.notion-nav__dropdown a:focus-visible {
    background: linear-gradient(90deg, rgba(124, 58, 237, 0.1), rgba(236, 72, 153, 0.1));
    color: var(--grad-start);
    transform: translateX(4px);
    outline: none;
}
.notion-nav__dropdown a:hover i,
.notion-nav__dropdown a:focus-visible i {
    transform: scale(1.15);
}
.notion-nav__dropdown a[aria-current="page"] {
    background: linear-gradient(90deg, rgba(124, 58, 237, 0.15), rgba(236, 72, 153, 0.15));
    color: var(--grad-start);
    font-weight: 600;
}
.notion-nav__link .fa-caret-down {
    transition: transform var(--t-fast) var(--ease);
}
.notion-nav__item.is-open .notion-nav__link .fa-caret-down {
    transform: rotate(180deg);
}

.notion-nav__hamburger {
    display: none;
    width: 44px;
    height: 44px;
    border: none;
    background: transparent;
    cursor: pointer;
    border-radius: var(--radius-sm);
    padding: 10px;
    transition: background var(--t-fast) var(--ease);
}
.notion-nav__hamburger:hover { background: rgba(124, 58, 237, 0.08); }
.notion-nav__hamburger span {
    display: block;
    width: 100%;
    height: 2px;
    background: var(--text);
    margin: 5px 0;
    border-radius: 2px;
    transition: all var(--t-fast) var(--ease);
    transform-origin: center;
}
.notion-nav__hamburger.is-open span:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
}
.notion-nav__hamburger.is-open span:nth-child(2) {
    opacity: 0;
}
.notion-nav__hamburger.is-open span:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
}

/* Mobile menu backdrop overlay */
.notion-nav__backdrop {
    display: none;
    position: fixed;
    top: var(--nav-h);
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(15, 15, 26, 0.5);
    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);
    z-index: 94;
    opacity: 0;
    transition: opacity var(--t-med) var(--ease);
}
.notion-nav__backdrop.is-visible {
    opacity: 1;
}

@media (max-width: 900px) {
    .notion-nav {
        background: rgba(255, 255, 255, 0.95);
    }
    .notion-nav__inner {
        padding: 0 1rem;
    }
    .notion-nav__hamburger {
        display: block;
        position: relative;
        z-index: 110;
        margin-left: auto;
        order: 2;
    }
    .notion-nav__settings {
        order: 3;
    }
    .notion-nav__backdrop {
        display: block;
        pointer-events: none;
    }
    .notion-nav__backdrop.is-visible {
        pointer-events: auto;
    }

    /* ========== Mobile menu panel ========== */
    .notion-nav__menu {
        position: fixed;
        top: var(--nav-h);
        right: 0;
        bottom: 0;
        left: auto;
        z-index: 95;
        width: 86%;
        max-width: 340px;
        height: calc(100vh - var(--nav-h));
        height: calc(100dvh - var(--nav-h));
        display: flex;
        flex-direction: column;
        align-items: stretch;
        justify-content: flex-start;
        gap: 0.35rem;
        padding: 1.5rem 1.25rem 2rem;
        margin: 0;
        background: #ffffff;
        border-left: 1px solid var(--border);
        box-shadow: -20px 0 60px rgba(15, 15, 26, 0.15);
        transform: translateX(105%);
        transition: transform 0.4s var(--ease);
        overflow-y: auto;
        overflow-x: hidden;
        -webkit-overflow-scrolling: touch;
    }
    .notion-nav__menu.is-open {
        transform: translateX(0);
    }

    /* Each nav item becomes a full-width block */
    .notion-nav__item {
        position: relative;
        width: 100%;
        display: block;
        margin: 0;
    }

    /* Top-level link fills the row */
    .notion-nav__link {
        display: flex;
        width: 100%;
        justify-content: space-between;
        align-items: center;
        padding: 0.95rem 1rem;
        font-size: 1rem;
        border-radius: var(--radius);
        background: transparent;
    }
    .notion-nav__link::after { display: none; }
    .notion-nav__link:hover,
    .notion-nav__link:focus-visible {
        background: rgba(124, 58, 237, 0.08);
    }
    .notion-nav__item.is-open > .notion-nav__link {
        background: linear-gradient(90deg, rgba(124, 58, 237, 0.12), rgba(236, 72, 153, 0.08));
        color: var(--grad-start);
    }

    /* Collapsed dropdown — becomes accordion */
    .notion-nav__dropdown {
        position: static;
        top: auto;
        left: auto;
        right: auto;
        transform: none;
        min-width: 0;
        width: auto;
        background: transparent;
        border: none;
        border-left: 2px solid var(--border-strong);
        border-radius: 0;
        padding: 0;
        margin: 0 0 0 1rem;
        box-shadow: none;
        display: block;
        opacity: 1;
        visibility: hidden;
        max-height: 0;
        overflow: hidden;
        transition: max-height 0.35s var(--ease),
                    visibility 0.35s var(--ease),
                    padding 0.35s var(--ease);
    }
    .notion-nav__item.is-open > .notion-nav__dropdown {
        visibility: visible;
        max-height: 600px;
        padding: 0.25rem 0 0.5rem 0.5rem;
    }
    /* Hover should NOT open on mobile — only the is-open class */
    .notion-nav__item:hover > .notion-nav__dropdown,
    .notion-nav__item:focus-within > .notion-nav__dropdown {
        visibility: hidden;
        max-height: 0;
        padding: 0;
        transform: none;
    }
    .notion-nav__item.is-open:hover > .notion-nav__dropdown,
    .notion-nav__item.is-open:focus-within > .notion-nav__dropdown {
        visibility: visible;
        max-height: 600px;
        padding: 0.25rem 0 0.5rem 0.5rem;
        transform: none;
    }
    .notion-nav__dropdown li {
        width: 100%;
    }
    .notion-nav__dropdown a {
        padding: 0.75rem 0.9rem;
        font-size: 0.95rem;
    }

    /* Prevent body scroll when menu is open (JS will add this class to <body>) */
    body.menu-open {
        overflow: hidden;
    }
}

@media (max-width: 480px) {
    .notion-nav__brand-text { display: none; }
    .notion-nav__menu {
        width: 92%;
    }
}

/* ==========================================================================
   BUTTONS
   ========================================================================== */
.notion-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    border-radius: var(--radius-sm);
    border: none;
    font-family: inherit;
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
    text-decoration: none;
    color: white;
    background: linear-gradient(135deg, var(--grad-start), var(--grad-end));
    box-shadow: var(--shadow-sm);
    transition: all var(--t-fast) var(--ease);
    position: relative;
    overflow: hidden;
}
.notion-btn::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, var(--grad-end), var(--grad-start));
    opacity: 0;
    transition: opacity var(--t-fast) var(--ease);
}
.notion-btn span, .notion-btn i { position: relative; z-index: 1; }
.notion-btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md), var(--shadow-glow);
}
.notion-btn:hover::before { opacity: 1; }
.notion-btn:active { transform: translateY(0); }
.notion-btn:focus-visible {
    outline: 2px solid var(--grad-accent);
    outline-offset: 3px;
}

.notion-btn--ghost {
    background: transparent;
    color: var(--text);
    border: 1.5px solid var(--border-strong);
    box-shadow: none;
}
.notion-btn--ghost::before { display: none; }
.notion-btn--ghost:hover {
    background: rgba(124, 58, 237, 0.06);
    border-color: var(--grad-start);
    color: var(--grad-start);
    box-shadow: var(--shadow-sm);
}

.notion-btn--danger {
    background: linear-gradient(135deg, #F87171, var(--danger));
}
.notion-btn--danger::before {
    background: linear-gradient(135deg, var(--danger), #DC2626);
}

/* ==========================================================================
   FORMS / INPUTS
   ========================================================================== */
.notion-input,
.notion-textarea,
.notion-select {
    width: 100%;
    padding: 0.75rem 1rem;
    font-family: inherit;
    font-size: 0.95rem;
    color: var(--text);
    background: var(--bg-elevated);
    border: 1.5px solid var(--border);
    border-radius: var(--radius-sm);
    transition: all var(--t-fast) var(--ease);
}
.notion-input:focus,
.notion-textarea:focus,
.notion-select:focus {
    outline: none;
    border-color: var(--grad-start);
    box-shadow: 0 0 0 4px rgba(124, 58, 237, 0.12);
}
.notion-textarea {
    resize: vertical;
    min-height: 100px;
}
.notion-label {
    display: block;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-soft);
    margin-bottom: 0.4rem;
}

/* ==========================================================================
   CARDS / GLASS PANELS
   ========================================================================== */
.notion-card {
    background: var(--bg-elevated);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 2rem;
    box-shadow: var(--shadow-md);
    position: relative;
    overflow: hidden;
    transition: all var(--t-med) var(--ease);
}
.notion-card::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--grad-start), var(--grad-end));
    opacity: 0;
    transition: opacity var(--t-med) var(--ease);
}
.notion-card:hover::before { opacity: 1; }
.notion-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: var(--border-strong);
}

.notion-glass {
    background: rgba(255, 255, 255, 0.7);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.5);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
}

/* ==========================================================================
   PAGE HEADERS (used by tools)
   ========================================================================== */
.tool-hero {
    text-align: center;
    padding: 3rem 1.5rem 2rem;
    max-width: 900px;
    margin: 0 auto;
}
.tool-hero__icon {
    width: 84px;
    height: 84px;
    margin: 0 auto 1.25rem;
    border-radius: 24px;
    display: grid;
    place-items: center;
    font-size: 2.4rem;
    color: white;
    background: linear-gradient(135deg, var(--grad-start), var(--grad-end));
    box-shadow: var(--shadow-md), var(--shadow-glow);
    animation: hero-icon-float 4s var(--ease) infinite;
}
@keyframes hero-icon-float {
    0%, 100% { transform: translateY(0) rotate(-3deg); }
    50%      { transform: translateY(-8px) rotate(3deg); }
}
.tool-hero h1 {
    font-size: clamp(2rem, 5vw, 3.25rem);
    font-weight: 700;
    line-height: 1.15;
    margin-bottom: 0.75rem;
    background: linear-gradient(135deg, var(--grad-start), var(--grad-end));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: shimmer 8s ease infinite;
    background-size: 200% 200%;
}
.tool-hero p {
    color: var(--text-soft);
    font-size: 1.1rem;
    max-width: 600px;
    margin: 0 auto;
}
@keyframes shimmer {
    0%, 100% { background-position: 0% 50%; }
    50%      { background-position: 100% 50%; }
}

/* ==========================================================================
   SCROLL-TO-TOP
   ========================================================================== */
.notion-scroll-top {
    position: fixed;
    bottom: 1.75rem;
    right: 1.75rem;
    width: 48px;
    height: 48px;
    border-radius: 50%;
    border: none;
    background: linear-gradient(135deg, var(--grad-start), var(--grad-end));
    color: white;
    font-size: 1.1rem;
    cursor: pointer;
    box-shadow: var(--shadow-md);
    z-index: 50;
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px) scale(0.9);
    transition: all var(--t-med) var(--ease);
}
.notion-scroll-top.is-visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0) scale(1);
}
.notion-scroll-top:hover {
    transform: translateY(-4px) scale(1.05);
    box-shadow: var(--shadow-lg), var(--shadow-glow);
}

/* ==========================================================================
   TOAST NOTIFICATION (replaces alert/prompt)
   ========================================================================== */
.notion-toast-stack {
    position: fixed;
    top: calc(var(--nav-h) + 1rem);
    right: 1.5rem;
    z-index: 200;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    pointer-events: none;
}
.notion-toast {
    background: var(--bg-elevated);
    color: var(--text);
    padding: 1rem 1.25rem;
    border-radius: var(--radius);
    border-left: 4px solid var(--grad-start);
    box-shadow: var(--shadow-lg);
    min-width: 260px;
    max-width: 360px;
    pointer-events: auto;
    animation: toast-in 0.4s var(--ease) forwards;
    font-size: 0.93rem;
    font-weight: 500;
}
.notion-toast.success { border-left-color: var(--success); }
.notion-toast.error   { border-left-color: var(--danger); }
.notion-toast.warning { border-left-color: var(--warning); }
.notion-toast.is-leaving {
    animation: toast-out 0.3s var(--ease) forwards;
}
@keyframes toast-in {
    from { opacity: 0; transform: translateX(20px); }
    to   { opacity: 1; transform: translateX(0); }
}
@keyframes toast-out {
    to { opacity: 0; transform: translateX(20px); }
}

/* ==========================================================================
   REVEAL ON SCROLL
   ========================================================================== */
.reveal {
    opacity: 0;
    transform: translateY(40px);
    transition: opacity var(--t-slow) var(--ease), transform var(--t-slow) var(--ease);
}
.reveal.is-visible {
    opacity: 1;
    transform: translateY(0);
}
.reveal.delay-1 { transition-delay: 0.1s; }
.reveal.delay-2 { transition-delay: 0.2s; }
.reveal.delay-3 { transition-delay: 0.3s; }

@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        transition-duration: 0.01ms !important;
    }
    .reveal { opacity: 1; transform: none; }
}

/* ==========================================================================
   UTIL
   ========================================================================== */
.notion-container {
    max-width: var(--container);
    margin: 0 auto;
    padding: 2rem 1.5rem;
}
.gradient-text {
    background: linear-gradient(135deg, var(--grad-start), var(--grad-end));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* ==========================================================================
   NAV SETTINGS / THEME TOGGLE
   ========================================================================== */
.notion-nav__settings {
    position: relative;
    margin-left: 0.25rem;
}
.notion-nav__settings-btn {
    width: 40px;
    height: 40px;
    border-radius: 12px;
    border: 1px solid var(--border);
    background: var(--bg-elevated);
    color: var(--text-soft);
    cursor: pointer;
    display: grid;
    place-items: center;
    transition: all var(--t-fast) var(--ease);
    font-size: 0.95rem;
}
.notion-nav__settings-btn:hover,
.notion-nav__settings-btn[aria-expanded="true"] {
    color: var(--grad-start);
    border-color: var(--border-strong);
    transform: translateY(-1px) rotate(20deg);
    box-shadow: var(--shadow-sm);
}
.notion-nav__settings-panel {
    position: absolute;
    top: calc(100% + 0.5rem);
    right: 0;
    width: 260px;
    background: var(--bg-elevated);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 0.85rem;
    box-shadow: var(--shadow-lg);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-8px);
    transition: all var(--t-fast) var(--ease);
    z-index: 120;
}
.notion-nav__settings-panel.is-open {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}
.settings-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.5rem 0.25rem;
    color: var(--text);
    font-size: 0.88rem;
    font-weight: 500;
}
.settings-row + .settings-row {
    border-top: 1px solid var(--border);
}
.settings-row__label {
    display: flex;
    align-items: center;
    gap: 0.55rem;
}
.settings-row__label i { color: var(--grad-start); width: 18px; text-align: center; }

/* Toggle switch */
.toggle-switch {
    position: relative;
    width: 42px;
    height: 24px;
    background: var(--bg-soft);
    border: 1px solid var(--border);
    border-radius: 999px;
    cursor: pointer;
    transition: all var(--t-fast) var(--ease);
    flex-shrink: 0;
}
.toggle-switch::after {
    content: '';
    position: absolute;
    top: 2px;
    left: 2px;
    width: 18px;
    height: 18px;
    background: white;
    border-radius: 50%;
    transition: transform var(--t-fast) var(--ease);
    box-shadow: 0 1px 4px rgba(0,0,0,0.2);
}
.toggle-switch[aria-checked="true"] {
    background: linear-gradient(135deg, var(--grad-start), var(--grad-end));
    border-color: transparent;
}
.toggle-switch[aria-checked="true"]::after {
    transform: translateX(18px);
}

.settings-btn-row {
    width: 100%;
    padding: 0.55rem 0.75rem;
    background: transparent;
    border: 1px solid var(--border);
    border-radius: 10px;
    color: var(--text);
    font-family: inherit;
    font-size: 0.85rem;
    font-weight: 500;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 0.55rem;
    transition: all var(--t-fast) var(--ease);
}
.settings-btn-row:hover {
    background: linear-gradient(90deg, rgba(124,58,237,0.08), rgba(236,72,153,0.08));
    border-color: var(--border-strong);
    color: var(--grad-start);
}
.settings-btn-row i { color: var(--grad-start); width: 18px; text-align: center; }
.settings-section {
    display: flex;
    flex-direction: column;
    gap: 0.4rem;
    margin-top: 0.4rem;
    padding-top: 0.4rem;
    border-top: 1px solid var(--border);
}

@media (max-width: 480px) {
    .notion-nav__settings-panel {
        right: -0.5rem;
        width: 240px;
    }
}