main > .container {
    padding: 70px 15px 20px;
    display: flex;
    flex-direction: column;
    min-height: 100%;
}

.not-set {
    color: var(--bs-danger);
    font-style: italic;
}

/* add sorting icons to gridview sort links */
a.asc:after, a.desc:after {
    content: '';
    left: 3px;
    display: inline-block;
    width: 0;
    height: 0;
    border: solid 5px transparent;
    margin: 4px 4px 2px 4px;
    background: transparent;
}

a.asc:after {
    border-bottom: solid 7px var(--bs-body-color);
    border-top-width: 0;
}

a.desc:after {
    border-top: solid 7px var(--bs-body-color);
    border-bottom-width: 0;
}

.grid-view th {
    white-space: nowrap;
}

.hint-block {
    display: block;
    margin-top: 5px;
    color: var(--bs-secondary-color);
}

.error-summary {
    color: var(--bs-danger-text-emphasis);
    background: var(--bs-danger-bg-subtle);
    border-left: 3px solid var(--bs-danger-border-subtle);
    padding: 10px 20px;
    margin: 0 0 15px 0;
}

/* align navbar brand baseline with nav links */
.navbar > .container,
.navbar > .container-fluid {
    align-items: baseline;
}

/* style navbar logout link color, hover state, and mobile layout */
.navbar-nav .nav-link.logout {
    color: var(--bs-navbar-color);
}

@media (max-width: 767.98px) {
    .navbar-nav .nav-link.logout {
        display: block;
        text-align: left;
        width: 100%;
        padding: 10px 0;
    }
}

.navbar-nav .nav-link.logout:focus,
.navbar-nav .nav-link.logout:hover {
    color: var(--bs-navbar-hover-color);
}



/* footer logo: light logo by default (light bg-body-tertiary), dark logo for dark theme */
.footer-logo-dark { display: none; }

[data-bs-theme="dark"] .footer-logo-light { display: none; }
[data-bs-theme="dark"] .footer-logo-dark  { display: inline-block; }

/* Yii brand button */
.btn-yii {
    background: linear-gradient(135deg, var(--color-brand-teal), var(--color-brand-teal-dark));
    border: none;
    font-weight: 600;
    letter-spacing: .02em;
    transition: opacity .2s, transform .1s;
}

.btn-yii:hover {
    opacity: .9;
    transform: translateY(-1px);
}

.btn-yii:active {
    transform: translateY(0);
}

/* form inputs: seamless icon inside input (Volt style) */
.form-card .input-group {
    border: var(--bs-border-width) solid var(--bs-border-color);
    border-radius: var(--bs-border-radius);
    overflow: hidden;
    transition: border-color .15s ease-in-out, box-shadow .15s ease-in-out;
}

.form-card .input-group .input-group-text {
    background: var(--bs-body-bg);
    border: 0;
    padding-left: 1rem;
    padding-right: .75rem;
    display: flex;
    align-items: center;
    justify-content: center;
}

.form-card .input-group .form-control {
    border: 0;
}

.form-card .input-group .form-control:focus {
    box-shadow: none;
}

.form-card .input-group:focus-within {
    border-color: var(--bs-primary);
    box-shadow: 0 0 0 .25rem rgba(var(--bs-primary-rgb), .25);
}

/* validation styles for browsers that support :has() */
@supports selector(.input-group:has(.is-invalid)) {
    .form-card .input-group:has(.is-invalid) ~ .invalid-feedback {
        display: block;
        margin-top: .35rem;
        margin-bottom: .5rem;
    }

    .form-card .input-group:has(.is-invalid) {
        border-color: var(--bs-danger);
    }

    .form-card .input-group:has(.is-invalid):focus-within {
        box-shadow: 0 0 0 .25rem rgba(var(--bs-danger-rgb), .25);
    }
}

/* fallback validation styles for browsers without :has() support */
@supports not selector(.input-group:has(.is-invalid)) {
    .form-card .invalid-feedback:not(:empty) {
        display: block;
        margin-top: .35rem;
        margin-bottom: .5rem;
    }

    .form-card .input-group .form-control.is-invalid {
        border: var(--bs-border-width) solid var(--bs-danger);
    }

    .form-card .input-group .form-control.is-invalid:focus {
        box-shadow: 0 0 0 .25rem rgba(var(--bs-danger-rgb), .25);
    }
}

/* login inputs: seamless icon inside input (Volt style) */
.login-split-card .input-group {
    border: var(--bs-border-width) solid var(--bs-border-color);
    border-radius: var(--bs-border-radius);
    overflow: hidden;
    transition: border-color .15s ease-in-out, box-shadow .15s ease-in-out;
}

.login-split-card .input-group .input-group-text {
    background: transparent;
    border: 0;
    padding-left: 1rem;
    padding-right: .75rem;
    display: flex;
    align-items: center;
    justify-content: center;
}

.login-split-card .input-group .form-control {
    border: 0;
    background: transparent;
}

.login-split-card .input-group .form-control:focus {
    box-shadow: none;
}

.login-split-card .input-group:focus-within {
    border-color: var(--bs-primary);
    box-shadow: 0 0 0 .25rem rgba(var(--bs-primary-rgb), .25);
}

/* validation styles for login split card (browsers with :has()) */
@supports selector(.input-group:has(.is-invalid)) {
    .login-split-card .input-group:has(.is-invalid) ~ .invalid-feedback {
        display: block;
        margin-top: .35rem;
        margin-bottom: .5rem;
    }

    .login-split-card .input-group:has(.is-invalid) {
        border-color: var(--bs-danger);
    }

    .login-split-card .input-group:has(.is-invalid):focus-within {
        box-shadow: 0 0 0 .25rem rgba(var(--bs-danger-rgb), .25);
    }
}

/* fallback validation styles for login split card (browsers without :has()) */
@supports not selector(.input-group:has(.is-invalid)) {
    .login-split-card .invalid-feedback:not(:empty) {
        display: block;
        margin-top: .35rem;
        margin-bottom: .5rem;
    }

    .login-split-card .input-group .form-control.is-invalid {
        border: var(--bs-border-width) solid var(--bs-danger);
    }

    .login-split-card .input-group .form-control.is-invalid:focus {
        box-shadow: 0 0 0 .25rem rgba(var(--bs-danger-rgb), .25);
    }
}

/* login split card */
.login-split-card {
    border-radius: 1rem;
    box-shadow: 0 4px 24px rgba(0, 0, 0, .10);
    background-color: var(--bs-gray-100);
    width: 100%;
    max-width: 900px;
}

.login-split-card-wide {
    max-width: 960px;
}

.login-brand-title {
    font-size: 1.75rem;
    line-height: 1.3;
}

.login-brand-text {
    font-size: .9rem;
}

.login-brand-panel {
    background: linear-gradient(135deg, var(--color-brand-teal) 0%, var(--color-brand-teal-dark) 40%, var(--color-brand-lime) 100%);
    position: relative;
    min-height: 480px;
}

.login-brand-panel::before {
    content: '';
    position: absolute;
    inset: 0;
    background:
        radial-gradient(circle at 20% 80%, rgba(241, 138, 42, .25) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(131, 201, 51, .2) 0%, transparent 40%);
    pointer-events: none;
}

.login-btn {
    background: linear-gradient(135deg, var(--color-brand-teal), var(--color-brand-teal-dark));
    border: none;
    font-weight: 600;
    letter-spacing: .02em;
    transition: opacity .2s, transform .1s;
}

.login-btn:hover {
    opacity: .9;
    transform: translateY(-1px);
}

.login-btn:active {
    transform: translateY(0);
}

/* dark mode login card */
[data-bs-theme="dark"] .login-split-card {
    background-color: var(--bs-body-bg);
    box-shadow: 0 0 0 1px var(--bs-border-color), 0 4px 24px rgba(0, 0, 0, .4);
}

[data-bs-theme="dark"] .login-mobile-logo {
    filter: invert(1);
}

/* contact form textarea height */
.site-contact textarea.form-control {
    height: 140px;
}

/* form cards */
.form-card {
    border-radius: 1rem;
    box-shadow: 0 4px 24px rgba(0, 0, 0, .10);
}

/* dark mode: elevate form cards against dark background */
[data-bs-theme="dark"] .form-card {
    box-shadow: 0 0 0 1px var(--bs-border-color), 0 4px 24px rgba(0, 0, 0, .4);
}

/* captcha: blend with card background */
.site-contact img[src*="captcha"] {
    border-radius: var(--bs-border-radius);
    mix-blend-mode: multiply;
}

/* dark mode: invert captcha for visibility on dark background */
[data-bs-theme="dark"] .site-contact img[src*="captcha"] {
    mix-blend-mode: screen;
    filter: invert(1) hue-rotate(180deg);
}

/* centered page layout */
.site-login,
.site-signup,
.site-contact,
.site-request-password-reset,
.site-reset-password,
.site-resend-verification-email,
.site-index,
.site-error,
.site-about {
    flex: 1;
}

.site-error .site-error-content,
.site-about .site-about-content {
    width: 100%;
    max-width: 90%;
}

@media (min-width: 576px) {
    .site-error .site-error-content,
    .site-about .site-about-content {
        max-width: 80%;
    }
}

@media (min-width: 768px) {
    .site-error .site-error-content,
    .site-about .site-about-content {
        max-width: 60%;
    }
}

@media (min-width: 992px) {
    .site-error .site-error-content,
    .site-about .site-about-content {
        max-width: 50%;
    }
}

/* hero banner */
.hero-banner {
    background: linear-gradient(135deg, var(--color-brand-lime) 0%, var(--color-brand-teal-dark) 40%, var(--color-brand-teal) 100%);
    position: relative;
}

.hero-lead {
    max-width: 520px;
}

.hero-logo {
    height: 120px;
    opacity: .45;
    right: 2.5rem;
    top: 50%;
    transform: translateY(-50%);
}

.hero-banner::before {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: inherit;
    background:
        radial-gradient(circle at 15% 85%, rgba(241, 138, 42, .3) 0%, transparent 45%),
        radial-gradient(circle at 85% 15%, rgba(131, 201, 51, .25) 0%, transparent 40%),
        radial-gradient(ellipse at 50% 50%, rgba(64, 179, 216, .15) 0%, transparent 60%);
    pointer-events: none;
}

/* extension cards */
.extension-card {
    transition: transform .15s ease-in-out, box-shadow .15s ease-in-out;
}

.extension-card:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 24px rgba(0, 0, 0, .12) !important;
}

.extension-icon {
    font-size: 1.5rem;
    line-height: 1;
}

/* dark mode: extension cards */
[data-bs-theme="dark"] .extension-card {
    background-color: var(--bs-body-bg);
    box-shadow: 0 0 0 1px var(--bs-border-color), 0 2px 8px rgba(0, 0, 0, .3);
}

[data-bs-theme="dark"] .extension-card:hover {
    box-shadow: 0 0 0 1px var(--bs-border-color), 0 8px 24px rgba(0, 0, 0, .4) !important;
}

/* ════════════════════════════════════════════════════════════════
   StartDutch design-token utilities
   (replaces inline styles and layout <style> blocks)
   ════════════════════════════════════════════════════════════════ */

/* ── Global layout ─────────────────────────────────────────── */
html { height: 100%; }

body {
    padding-top: 72px;
    background-color: var(--surface-page);
    font-family: var(--font-body);
    overflow-x: hidden;
}

/* Full-page mode (no scrollbar) — set via $this->params['bodyClass'] = 'sd-full-page' */
body.sd-full-page {
    height: 100%;
    overflow: hidden;
}
body.sd-full-page main.container {
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

/* Landing page flex sections */
.sd-landing {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: .75rem;
    min-height: 0;
}
.sd-landing-hero {
    flex: 1;
    display: flex;
    align-items: center;
    min-height: 0;
    border-radius: .75rem;
}
.sd-landing-features {
    flex-shrink: 0;
}

/* ── Nav links — active orange underline ───────────────────── */
.sd-nav-link {
    position: relative;
    opacity: .8;
    transition: opacity .15s;
}
.sd-nav-link:hover { opacity: 1; }
.sd-nav-active {
    opacity: 1 !important;
    font-weight: 600;
}
.sd-nav-active::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: .5rem;
    right: .5rem;
    height: 2px;
    border-radius: 1px;
    background: #FB923C;
}

/* ── Headings — Plus Jakarta Sans ──────────────────────────── */
h1, h2, h3, h4, h5, h6,
.display-1, .display-2, .display-3, .display-4, .display-5, .display-6 {
    font-family: var(--font-heading);
    font-weight: 700;
}

/* ── Global card defaults ──────────────────────────────────── */
.card {
    border-radius: .75rem !important;
}

/* ── Difficulty text colours ───────────────────────────────── */
.difficulty-easy   { color: var(--badge-easy);   }
.difficulty-medium { color: var(--badge-medium);  }
.difficulty-hard   { color: var(--badge-hard);    }

/* ── Stat card accent border ───────────────────────────────── */
.card-stats {
    border-left: 4px solid var(--color-secondary);
}

/* ── Difficulty badge classes ──────────────────────────────── */
.badge-easy   { background-color: var(--badge-easy);   color: #fff; }
.badge-medium { background-color: var(--badge-medium); color: #fff; }
.badge-hard   { background-color: var(--badge-hard);   color: #fff; }

/* ── Mastery tier text colours ─────────────────────────────── */
.mastery-dot-learning { color: var(--mastery-learning); }
.mastery-dot-familiar { color: var(--mastery-familiar); }
.mastery-dot-mastered { color: var(--mastery-mastered); }

/* ── Translation text (vocabulary browser) ─────────────────── */
.translation-text {
    font-size: 1rem;
    color: var(--color-text);
    font-weight: 600;
    min-height: 1.4em;
}

/* ── Orange text (retention warning, "overdue 14 days") ─────── */
.text-warning-orange {
    color: var(--color-warning) !important;
}

/* ── TTS icon button ───────────────────────────────────────── */
.btn-tts-icon {
    line-height: 1;
    color: var(--color-muted);
}

/* ── XP float animation ────────────────────────────────────── */
.xp-fly {
    position: fixed;
    font-weight: 700;
    color: var(--color-accent);
    font-size: 1.1rem;
    pointer-events: none;
    animation: xpFly 1s ease forwards;
    z-index: 9999;
}

@keyframes xpFly {
    0%   { opacity: 1; transform: translateY(0)     scale(1);   }
    80%  { opacity: 1; transform: translateY(-40px) scale(1.1); }
    100% { opacity: 0; transform: translateY(-60px) scale(0.9); }
}

/* ── 5-in-a-row combo pop ──────────────────────────────────── */
@keyframes comboPop {
    0%   { opacity: 0; transform: scale(0.5); }
    30%  { opacity: 1; transform: scale(1.2); }
    70%  { opacity: 1; transform: scale(1);   }
    100% { opacity: 0; transform: scale(0.8); }
}

/* ── Onboarding step dots ──────────────────────────────────── */
.onboarding-dot-active   { background: var(--color-primary) !important; }
.onboarding-dot-inactive { background: #dee2e6 !important; }

/* ── Onboarding picker cards ───────────────────────────────── */
.picker-card {
    cursor: pointer;
    border-color: #dee2e6 !important;
    transition: border-color .15s ease;
}
.picker-card.selected,
.picker-card:hover {
    border-color: var(--color-primary) !important;
}

/* ── Streak calendar blocks ────────────────────────────────── */
.streak-day-active   { background: var(--color-primary); }
.streak-day-inactive { background: #dee2e6; }

/* ── Pagination — pill style ───────────────────────────────── */
.pagination .page-link {
    border-color: #dee2e6;
    color: var(--color-primary);
    transition: background .15s, color .15s;
}
.pagination .page-link:hover {
    background: #EFF6FF;
    color: var(--color-primary);
    border-color: var(--color-primary);
}
.pagination .page-item.active .page-link {
    background-color: var(--color-primary);
    border-color: var(--color-primary);
    color: #fff;
}
.pagination .page-item.disabled .page-link {
    color: #adb5bd;
    border-color: #dee2e6;
}

/* ── Vocabulary browser card hover ─────────────────────────── */
.vocab-card {
    transition: transform .15s ease, box-shadow .15s ease;
    border-radius: .75rem !important;
}
.vocab-card:hover {
    transform: translateY(-3px);
    box-shadow: 0 .5rem 1.2rem rgba(0, 0, 0, .12) !important;
}