/* niDar Tools - Common UI Styles */

:root {
    --primary: #2e7d32;
    --text: #f1f5f9;
    --muted: #94a3b8;
    --bg: #0b0f19;
    --card: #172235;
}

* {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    font-family: Arial, sans-serif;
    background: var(--bg);
    color: var(--text);
}

a {
    color: var(--primary);
}

.nidar-scroll-top {
    position: fixed;
    right: 18px;
    bottom: 22px;
    width: 46px;
    height: 46px;
    border: 0;
    border-radius: 50%;
    background: #2e7d32;
    color: white;
    font-size: 22px;
    font-weight: bold;
    cursor: pointer;
    display: none;
    z-index: 9999;
    box-shadow: 0 4px 14px rgba(0,0,0,.35);
}

.nidar-scroll-top.is-visible {
    display: block;
}

@media (max-width: 768px) {
    .nidar-scroll-top {
        right: 14px;
        bottom: 18px;
    }
}

/* =========================================================
   niDar Tools - Global Header
   ========================================================= */

.nidar-header {
    position: sticky;
    top: 0;
    z-index: 9999;
    width: 100%;
    background: var(--card, #172235);
    border-bottom: 1px solid rgba(255,255,255,0.10);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
}

.nidar-navbar {
    width: 100%;
    max-width: 1400px;
    min-height: 68px;
    margin: 0 auto;
    padding: 10px 20px;
    display: flex;
    align-items: center;
    gap: 18px;
}

.nidar-logo {
    display: inline-flex;
    align-items: center;
    gap: 9px;
    flex-shrink: 0;
    text-decoration: none;
    color: var(--text, #f1f5f9);
    font-size: 1.15rem;
    font-weight: 700;
}

.nidar-logo:hover {
    color: var(--primary, #2e7d32);
}

.header-logo-icon {
    width: 42px;
    height: 42px;
    object-fit: contain;
    border-radius: 8px;
}

.nidar-nav {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    flex: 1;
    flex-wrap: wrap;
}

.nidar-nav a {
    padding: 8px 10px;
    border-radius: 7px;
    text-decoration: none;
    color: var(--text, #f1f5f9);
    font-size: 0.9rem;
    white-space: nowrap;
    transition: background 0.2s ease, color 0.2s ease;
}

.nidar-nav a:hover {
    color: var(--primary, #2e7d32);
    background: rgba(46,125,50,0.10);
}

.nidar-header-actions {
    display: flex;
    align-items: center;
    gap: 8px;
    flex-shrink: 0;
}

.nidar-search-btn,
.nidar-theme-btn,
.nidar-menu-toggle {
    width: 42px;
    height: 42px;
    border: 1px solid rgba(255,255,255,0.14);
    border-radius: 9px;
    background: transparent;
    color: var(--text, #f1f5f9);
    cursor: pointer;
    font-size: 1.1rem;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s ease;
}

.nidar-search-btn:hover,
.nidar-theme-btn:hover,
.nidar-menu-toggle:hover {
    background: rgba(46,125,50,0.12);
    border-color: var(--primary, #2e7d32);
    transform: translateY(-1px);
}

.nidar-menu-toggle {
    display: none;
}

/* Search Panel */

.nidar-search-panel {
    width: min(900px, calc(100% - 30px));
    margin: 0 auto 12px;
    padding: 14px;
    border: 1px solid rgba(255,255,255,0.12);
    border-radius: 12px;
    background: var(--card, #172235);
}

.nidar-search-panel[hidden] {
    display: none;
}

.nidar-search-panel label {
    display: block;
    margin-bottom: 7px;
    font-size: 0.85rem;
    color: var(--muted, #94a3b8);
}

.nidar-search-panel input {
    width: 100%;
    padding: 11px 13px;
    border: 1px solid rgba(255,255,255,0.15);
    border-radius: 8px;
    outline: none;
    background: var(--bg, #0b0f19);
    color: var(--text, #f1f5f9);
    font-size: 1rem;
}

.nidar-search-panel input:focus {
    border-color: var(--primary, #2e7d32);
}

/* =========================================================
   Mobile Header
   ========================================================= */

@media (max-width: 900px) {

    .nidar-navbar {
        min-height: 62px;
        padding: 9px 14px;
        flex-wrap: wrap;
    }

    .nidar-menu-toggle {
        display: inline-flex;
        margin-left: auto;
    }

    .nidar-header-actions {
        order: 3;
    }

    .nidar-nav {
        order: 4;
        display: none;
        width: 100%;
        flex-direction: column;
        align-items: stretch;
        gap: 3px;
        padding-top: 8px;
        border-top: 1px solid rgba(255,255,255,0.10);
    }

    .nidar-nav.is-open {
        display: flex;
    }

    .nidar-nav a {
        width: 100%;
        padding: 11px 12px;
    }
}

@media (max-width: 480px) {

    .nidar-logo span {
        display: none;
    }

    .header-logo-icon {
        width: 40px;
        height: 40px;
    }

    .nidar-search-btn,
    .nidar-theme-btn,
    .nidar-menu-toggle {
        width: 39px;
        height: 39px;
    }

    .nidar-navbar {
        gap: 8px;
    }
}


/* =========================================================
   niDar Tools - Global Theme System
   Light / Dark / High Contrast
   ========================================================= */

/* ---------- Light Theme ---------- */

html[data-theme="light"] {
    --bg: #f8fafc;
    --text: #172033;
    --muted: #64748b;
    --card: #ffffff;
    --primary: #2e7d32;
    --border: #e2e8f0;
}


/* ---------- Dark Theme ---------- */

html[data-theme="dark"] {
    --bg: #0b0f19;
    --text: #f1f5f9;
    --muted: #94a3b8;
    --card: #172235;
    --primary: #4caf50;
    --border: #334155;
}


/* ---------- High Contrast / Senior Theme ---------- */

html[data-theme="senior"] {
    --bg: #000000;
    --text: #ffffff;
    --muted: #ffffff;
    --card: #111111;
    --primary: #ffff00;
    --border: #ffffff;
}


/* ---------- Global Theme Transition ---------- */

html,
body,
.nidar-header,
.nidar-search-panel,
.nidar-search-btn,
.nidar-theme-btn,
.nidar-menu-toggle,
.nidar-nav a,
.card,
footer {
    transition:
        background-color 0.25s ease,
        color 0.25s ease,
        border-color 0.25s ease,
        box-shadow 0.25s ease;
}


/* ---------- High Contrast Improvements ---------- */

html[data-theme="senior"] body {
    font-size: 17px;
    line-height: 1.6;
}

html[data-theme="senior"] .nidar-header {
    border-bottom: 2px solid #ffffff;
}

html[data-theme="senior"] .nidar-nav a,
html[data-theme="senior"] .nidar-logo,
html[data-theme="senior"] .nidar-search-btn,
html[data-theme="senior"] .nidar-theme-btn,
html[data-theme="senior"] .nidar-menu-toggle {
    color: #ffffff;
}

html[data-theme="senior"] .nidar-nav a:hover,
html[data-theme="senior"] .nidar-logo:hover {
    color: #ffff00;
}

html[data-theme="senior"] .nidar-search-btn,
html[data-theme="senior"] .nidar-theme-btn,
html[data-theme="senior"] .nidar-menu-toggle {
    border-color: #ffffff;
}

html[data-theme="senior"] .nidar-search-btn:hover,
html[data-theme="senior"] .nidar-theme-btn:hover,
html[data-theme="senior"] .nidar-menu-toggle:hover {
    background: #ffff00;
    color: #000000;
}

html[data-theme="senior"] .nidar-search-panel {
    border: 2px solid #ffffff;
}

html[data-theme="senior"] .nidar-search-panel input {
    border: 2px solid #ffffff;
    background: #000000;
    color: #ffffff;
}

html[data-theme="senior"] .nidar-search-panel input::placeholder {
    color: #ffffff;
}

html[data-theme="senior"] .nidar-scroll-top {
    background: #ffff00;
    color: #000000;
    border: 2px solid #ffffff;
}


/* ---------- Accessibility ---------- */

html[data-theme="senior"] a {
    color: #ffff00;
}

html[data-theme="senior"] button,
html[data-theme="senior"] input {
    font-size: 1rem;
}


/* ---------- Senior Theme Footer Text ---------- */

html[data-theme="senior"] footer p,
html[data-theme="senior"] footer strong {
    color: #ffffff;
    font-weight: 700;
}

html[data-theme="senior"] footer a {
    color: #ffffff;
    font-weight: 700;
    text-decoration: underline;
}

html[data-theme="senior"] footer a:hover {
    color: #ffff00;
}

/* =========================================================
   niDar Tools - Professional Navigation Dropdown
   ========================================================= */

.nidar-nav-dropdown {
    position: relative;
    display: inline-flex;
    align-items: center;
}

.nidar-dropdown-btn {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    padding: 8px 10px;
    border: 0;
    border-radius: 7px;
    background: transparent;
    color: var(--text, #f1f5f9);
    font: inherit;
    font-size: 0.9rem;
    cursor: pointer;
    white-space: nowrap;
    transition: background 0.2s ease, color 0.2s ease;
}

.nidar-dropdown-btn:hover,
.nidar-nav-dropdown:hover > .nidar-dropdown-btn {
    color: var(--primary, #2e7d32);
    background: rgba(46,125,50,0.10);
}

.nidar-dropdown-menu {
    position: absolute;
    top: calc(100% + 8px);
    left: 50%;
    transform: translateX(-50%);
    width: 720px;
    max-width: calc(100vw - 30px);
    padding: 18px;
    display: none;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 18px;
    background: var(--card, #172235);
    border: 1px solid var(--border, rgba(255,255,255,0.12));
    border-radius: 14px;
    box-shadow: 0 18px 45px rgba(0,0,0,0.25);
    z-index: 10000;
}

.nidar-nav-dropdown:hover .nidar-dropdown-menu,
.nidar-nav-dropdown:focus-within .nidar-dropdown-menu {
    display: grid;
}

.nidar-dropdown-section {
    display: flex;
    flex-direction: column;
    gap: 3px;
}

.nidar-dropdown-section strong {
    margin-bottom: 6px;
    color: var(--primary, #2e7d32);
    font-size: 0.85rem;
}

.nidar-dropdown-menu a {
    display: block;
    padding: 7px 8px;
    border-radius: 6px;
    color: var(--text, #f1f5f9);
    text-decoration: none;
    font-size: 0.85rem;
    transition: background 0.2s ease, color 0.2s ease;
}

.nidar-dropdown-menu a:hover {
    color: var(--primary, #2e7d32);
    background: rgba(46,125,50,0.10);
}

/* ---------- More Menu ---------- */

.nidar-more-dropdown .nidar-dropdown-menu {
    width: 230px;
    grid-template-columns: 1fr;
    gap: 4px;
}

/* ---------- Senior Theme ---------- */

html[data-theme="senior"] .nidar-dropdown-btn,
html[data-theme="senior"] .nidar-dropdown-menu a {
    color: #ffffff;
}

html[data-theme="senior"] .nidar-dropdown-btn:hover,
html[data-theme="senior"] .nidar-nav-dropdown:hover > .nidar-dropdown-btn {
    color: #ffff00;
    background: #000000;
}

html[data-theme="senior"] .nidar-dropdown-menu {
    background: #000000;
    border: 2px solid #ffffff;
    box-shadow: none;
}

html[data-theme="senior"] .nidar-dropdown-section strong {
    color: #ffff00;
}

html[data-theme="senior"] .nidar-dropdown-menu a:hover {
    color: #ffff00;
    background: #000000;
}

/* ---------- Mobile Dropdown ---------- */

@media (max-width: 900px) {

    .nidar-nav-dropdown {
        width: 100%;
        display: block;
    }

    .nidar-dropdown-btn {
        width: 100%;
        justify-content: space-between;
        padding: 11px 12px;
    }

    .nidar-dropdown-menu,
    .nidar-more-dropdown .nidar-dropdown-menu {
        position: static;
        transform: none;
        width: 100%;
        max-width: none;
        display: none;
        grid-template-columns: 1fr;
        gap: 8px;
        margin-top: 4px;
        padding: 10px;
        border-radius: 10px;
        box-shadow: none;
    }

    .nidar-nav-dropdown:hover .nidar-dropdown-menu {
        display: none;
    }

    .nidar-nav-dropdown:focus-within .nidar-dropdown-menu {
        display: grid;
    }

    .nidar-dropdown-section {
        padding-bottom: 6px;
    }

    .nidar-dropdown-section strong {
        display: block;
        padding: 5px 8px;
    }

    .nidar-dropdown-menu a {
        padding: 9px 10px;
    }
}

/* =========================================================
   niDar Tools - Professional Common Footer
   ========================================================= */

.nidar-footer {
    width: 100%;
    margin-top: 60px;
    padding: 50px 20px 25px;
    background: var(--card, #172235);
    border-top: 1px solid var(--border, rgba(255,255,255,0.10));
}

.nidar-footer-container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
}

.nidar-footer-grid {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 35px;
}

.nidar-footer-column {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 9px;
}

.nidar-footer-column h3 {
    margin: 0 0 8px;
    color: var(--text, #f1f5f9);
    font-size: 1rem;
    font-weight: 700;
}

.nidar-footer-column a {
    color: var(--muted, #94a3b8);
    text-decoration: none;
    font-size: 0.9rem;
    transition: color 0.2s ease, transform 0.2s ease;
}

.nidar-footer-column a:hover {
    color: var(--primary, #2e7d32);
    transform: translateX(3px);
}

/* ---------- Social Icons ---------- */

.nidar-social-icons {
    display: flex;
    flex-wrap: wrap;
    gap: 4px;
    margin-top: 4px;
}

.nidar-social-icon {
    width: 40px;
    height: 40px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border: 1px solid var(--border, rgba(255,255,255,0.14));
    border-radius: 10px;
    color: var(--text, #f1f5f9);
    background: transparent;
    font-size: 1rem;
    font-weight: 700;
    transition:
        background 0.2s ease,
        color 0.2s ease,
        border-color 0.2s ease,
        transform 0.2s ease;
}

.nidar-social-icon:hover {
    color: var(--primary, #2e7d32);
    border-color: var(--primary, #2e7d32);
    background: rgba(46,125,50,0.10);
    transform: translateY(-2px);
}

/* ---------- Footer Divider ---------- */

.nidar-footer-divider {
    width: 100%;
    height: 1px;
    margin: 35px 0 25px;
    background: var(--border, rgba(255,255,255,0.10));
}

/* ---------- Footer Brand ---------- */

.nidar-footer-brand {
    text-align: center;
}

.nidar-developed-label {
    margin: 0;
    color: var(--muted, #94a3b8);
    font-size: 0.85rem;
}

.nidar-developed-name {
    margin: 5px 0;
    color: var(--primary, #2e7d32);
    font-size: 1rem;
    font-weight: 700;
}

.nidar-copyright {
    margin: 8px 0 0;
    color: var(--muted, #94a3b8);
    font-size: 0.8rem;
}

/* ---------- Senior Theme Footer ---------- */

html[data-theme="senior"] .nidar-footer {
    background: #000000;
    border-top: 2px solid #ffffff;
}

html[data-theme="senior"] .nidar-footer-column h3,
html[data-theme="senior"] .nidar-footer-column a,
html[data-theme="senior"] .nidar-developed-label,
html[data-theme="senior"] .nidar-developed-name,
html[data-theme="senior"] .nidar-copyright {
    color: #ffffff;
    font-weight: 700;
}

html[data-theme="senior"] .nidar-footer-column a {
    text-decoration: underline;
}

html[data-theme="senior"] .nidar-footer-column a:hover {
    color: #ffff00;
}

html[data-theme="senior"] .nidar-footer-divider {
    background: #ffffff;
}

html[data-theme="senior"] .nidar-social-icon {
    color: #ffffff;
    border: 2px solid #ffffff;
}

html[data-theme="senior"] .nidar-social-icon:hover {
    color: #ffff00;
    background: #000000;
    border-color: #ffff00;
}

/* ---------- Mobile Footer ---------- */

@media (max-width: 800px) {

    .nidar-footer {
        margin-top: 45px;
        padding: 40px 18px 22px;
    }

    .nidar-footer-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
        gap: 30px 22px;
    }
}

@media (max-width: 480px) {

    .nidar-footer-grid {
        grid-template-columns: 1fr;
        gap: 25px;
    }

    .nidar-footer-column {
        align-items: center;
        text-align: center;
    }

    .nidar-social-icons {
        justify-content: center;
    }
}

/* =========================================================
   niDar Tools — Professional Tool Page Design System
   ========================================================= */

.nidar-tool-page {
    max-width: 1200px;
    margin: 0 auto;
    padding: 36px 20px 60px;
}

.nidar-tool-hero {
    text-align: center;
    padding: 44px 28px;
    margin-bottom: 28px;
    border: 1px solid var(--border-color, #e2e8f0);
    border-radius: 24px;
    background: linear-gradient(135deg, rgba(219,234,254,.75), rgba(255,255,255,.96));
    box-shadow: 0 12px 35px rgba(15,23,42,.07);
}

.nidar-tool-icon-large {
    width: 76px;
    height: 76px;
    margin: 0 auto 18px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 20px;
    background: rgba(46,125,50,.10);
    font-size: 40px;
}

.nidar-tool-hero h1 {
    margin: 0;
    font-size: clamp(28px, 4vw, 44px);
    line-height: 1.15;
}

.nidar-tool-hero p {
    max-width: 760px;
    margin: 14px auto 0;
    font-size: 16px;
    line-height: 1.7;
    opacity: .72;
}

.nidar-tool-guide {
    display: inline-flex;
    margin-top: 18px;
    padding: 10px 16px;
    border-radius: 999px;
    text-decoration: none;
    background: rgba(46,125,50,.09);
    font-weight: 600;
}

.nidar-tool-workspace {
    display: grid;
    grid-template-columns: minmax(0, 1fr);
    gap: 22px;
}

.nidar-tool-section {
    padding: 26px;
    border: 1px solid var(--border-color, #e2e8f0);
    border-radius: 20px;
    background: var(--card-bg, #fff);
    box-shadow: 0 8px 25px rgba(15,23,42,.06);
}

.nidar-tool-section h2 {
    margin: 0 0 18px;
    font-size: 21px;
}

.nidar-tool-section + .nidar-tool-section {
    margin-top: 0;
}

.nidar-tool-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 18px;
}

.nidar-tool-field {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.nidar-tool-field label {
    font-weight: 600;
    font-size: 14px;
}

.nidar-tool-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    margin-top: 22px;
}

.nidar-tool-primary {
    min-height: 48px;
    padding: 12px 22px;
    border: 0;
    border-radius: 12px;
    font-weight: 700;
    cursor: pointer;
}

.nidar-tool-result {
    border: 2px solid rgba(46,125,50,.25);
    background: rgba(46,125,50,.045);
}

.nidar-tool-upload {
    padding: 34px 22px;
    text-align: center;
    border: 2px dashed rgba(46,125,50,.35);
    border-radius: 18px;
    background: rgba(46,125,50,.035);
}

.nidar-tool-upload input[type="file"] {
    max-width: 100%;
}

.nidar-tool-preview {
    margin-top: 20px;
    text-align: center;
}

.nidar-tool-preview img {
    max-width: min(100%, 420px);
    max-height: 420px;
    object-fit: contain;
    border-radius: 14px;
    border: 1px solid var(--border-color, #e2e8f0);
}

.nidar-tool-help {
    margin-top: 22px;
    padding: 22px;
    border-radius: 18px;
    background: rgba(148,163,184,.08);
    border: 1px solid var(--border-color, #e2e8f0);
}

@media (max-width: 760px) {
    .nidar-tool-page {
        padding: 24px 14px 44px;
    }

    .nidar-tool-hero {
        padding: 32px 18px;
        border-radius: 20px;
    }

    .nidar-tool-section {
        padding: 20px;
        border-radius: 18px;
    }

    .nidar-tool-grid {
        grid-template-columns: 1fr;
    }

    .nidar-tool-actions {
        flex-direction: column;
    }

    .nidar-tool-actions > * {
        width: 100%;
    }
}

html[data-theme="dark"] .nidar-tool-hero {
    background: linear-gradient(135deg, rgba(30,58,138,.28), rgba(15,23,42,.96));
}

html[data-theme="dark"] .nidar-tool-section {
    background: var(--card-bg, #111827);
}

html[data-theme="senior"] .nidar-tool-hero,
html[data-theme="senior"] .nidar-tool-section,
html[data-theme="senior"] .nidar-tool-help {
    border: 2px solid #000;
    box-shadow: none;
}

html[data-theme="senior"] .nidar-tool-hero,
html[data-theme="senior"] .nidar-tool-section {
    background: #fff;
    color: #000;
}


/* =========================================================
   niDar Tools — Rainbow Brand Header
   ========================================================= */

.nidar-header {
    position: relative;
    background: var(--header-bg, #ffffff);
    border-bottom: 1px solid rgba(120, 120, 140, 0.16);
    box-shadow: 0 4px 22px rgba(0, 0, 0, 0.06);
}

.nidar-navbar {
    min-height: 76px;
    padding: 10px 28px;
    gap: 22px;
}

/* Brand: niDar logo + Tools */
.nidar-logo {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    flex-shrink: 0;
    text-decoration: none;
}

.nidar-logo .header-logo-icon {
    width: 104px;
    height: 52px;
    object-fit: contain;
    border-radius: 0;
    display: block;
}

.nidar-logo-text {
    font-size: 30px;
    font-weight: 800;
    line-height: 1;
    letter-spacing: -1px;

    background: linear-gradient(
        90deg,
        #ff2db2 0%,
        #8a2be2 18%,
        #1479ff 36%,
        #00cfff 52%,
        #00d875 68%,
        #ffe600 82%,
        #ff3b30 100%
    );
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

/* Navigation */
.nidar-nav {
    gap: 4px;
}

.nidar-nav > a,
.nidar-dropdown-btn {
    position: relative;
    color: var(--text-color, #172033);
    font-weight: 600;
    padding: 10px 12px;
    transition:
        color 0.25s ease,
        transform 0.25s ease;
}

/* Rainbow hover / active underline */
.nidar-nav > a::after,
.nidar-dropdown-btn::after {
    content: "";
    position: absolute;
    left: 12px;
    right: 12px;
    bottom: 3px;
    height: 3px;
    border-radius: 999px;
    background: linear-gradient(
        90deg,
        #ff2db2,
        #8a2be2,
        #1479ff,
        #00dfff,
        #00d875,
        #ffe600,
        #ff3b30
    );
    transform: scaleX(0);
    transform-origin: center;
    transition: transform 0.25s ease;
}

.nidar-nav > a:hover,
.nidar-dropdown-btn:hover {
    color: #2e7d32;
    transform: translateY(-1px);
}

.nidar-nav > a:hover::after,
.nidar-dropdown-btn:hover::after {
    transform: scaleX(1);
}

/* Header action buttons */
.nidar-header-actions button {
    border: 1px solid rgba(100, 110, 130, 0.25);
    background: transparent;
    transition:
        border-color 0.25s ease,
        box-shadow 0.25s ease,
        transform 0.25s ease;
}

.nidar-header-actions button:hover {
    border-color: transparent;
    box-shadow:
        0 0 0 2px rgba(255, 45, 178, 0.18),
        0 0 18px rgba(20, 121, 255, 0.18);
    transform: translateY(-1px);
}

/* Full-width rainbow separator */
.nidar-header::after {
    content: "";
    display: block;
    height: 4px;
    margin: 0 28px;
    border-radius: 999px 999px 0 0;
    background: linear-gradient(
        90deg,
        #ff4fd8 0%,
        #8a2be2 16%,
        #1769ff 32%,
        #00d9ff 48%,
        #00df75 64%,
        #dfff00 76%,
        #ffb300 88%,
        #ff3030 100%
    );
    box-shadow: 0 0 14px rgba(138, 43, 226, 0.28);
}

/* Dark theme */
html[data-theme="dark"] .nidar-header,
body.dark-mode .nidar-header {
    background: #080b12;
    border-bottom-color: rgba(255, 255, 255, 0.10);
    box-shadow: 0 4px 28px rgba(0, 0, 0, 0.35);
}

html[data-theme="dark"] .nidar-nav > a,
html[data-theme="dark"] .nidar-dropdown-btn,
body.dark-mode .nidar-nav > a,
body.dark-mode .nidar-dropdown-btn {
    color: #f3f6ff;
}

html[data-theme="dark"] .nidar-nav > a:hover,
html[data-theme="dark"] .nidar-dropdown-btn:hover,
body.dark-mode .nidar-nav > a:hover,
body.dark-mode .nidar-dropdown-btn:hover {
    color: #ffffff;
}

/* Senior theme — keep rainbow identity but improve readability */
html[data-theme="senior"] .nidar-logo-text {
    font-size: 32px;
    font-weight: 900;
}

html[data-theme="senior"] .nidar-nav > a,
html[data-theme="senior"] .nidar-dropdown-btn {
    font-weight: 800;
}

/* Mobile */
@media (max-width: 900px) {
    .nidar-navbar {
        padding: 9px 18px;
        min-height: 70px;
    }

    .nidar-logo {
        gap: 7px;
    }

    .nidar-logo .header-logo-icon {
        width: 88px;
        height: 44px;
    }

    .nidar-logo-text {
        font-size: 25px;
    }

    .nidar-header::after {
        margin: 0 18px;
    }
}

@media (max-width: 560px) {
    .nidar-navbar {
        padding: 8px 12px;
        gap: 8px;
    }

    .nidar-logo .header-logo-icon {
        width: 76px;
        height: 38px;
    }

    .nidar-logo-text {
        font-size: 22px;
        letter-spacing: -0.7px;
    }

    .nidar-header::after {
        height: 3px;
        margin: 0 12px;
    }
}


/* =========================================================
   niDar Tools — Header Layout Fix
   ========================================================= */

.nidar-navbar {
    flex-wrap: nowrap;
}

.nidar-logo {
    flex-shrink: 0;
}

.nidar-logo-text {
    flex-shrink: 0;
    white-space: nowrap;
}

.nidar-nav {
    flex-wrap: nowrap;
    min-width: 0;
}

.nidar-nav > a,
.nidar-dropdown-btn {
    white-space: nowrap;
}

/* Tablet / Mobile — navigation stays inside hamburger menu */
@media (max-width: 900px) {
    .nidar-navbar {
        flex-wrap: wrap;
    }

    .nidar-nav {
        flex-wrap: nowrap;
    }

    .nidar-nav:not(.is-open) {
        display: none;
    }

    .nidar-nav.is-open {
        display: flex;
    }
}

/* Small mobile — keep brand visible */
@media (max-width: 480px) {
    .nidar-logo span.nidar-logo-text {
        display: inline;
        font-size: 21px;
    }

    .nidar-logo .header-logo-icon {
        width: 76px;
        height: 38px;
    }
}