html {
    /* Global background for all pages */
    /*background: repeating-radial-gradient(rgba(0, 0, 0, 0.9), rgba(0, 0, 0, 0.95) 100px);*/
    background: var(--ptp-body-bg);
    font-size: 14px;
}

@media (min-width: 768px) {
    html { font-size: 16px; }
}

.btn:focus, .btn:active:focus, .btn-link.nav-link:focus, .form-control:focus, .form-check-input:focus { box-shadow: 0000.1rem white, 0000.25rem #258cfb; }

html {
    min-height: 100%;
    position: relative;
}

.form-floating > .form-control-plaintext::placeholder, .form-floating > .form-control::placeholder {
    color: var(--bs-secondary-color);
    text-align: end;
}

.form-floating > .form-control-plaintext:focus::placeholder, .form-floating > .form-control:focus::placeholder { text-align: start; }

[data-theme="light"] {
    --ptp-body-bg: #dfe7fb;
    --ptp-surface-bg: #d4e1ff;
    --ptp-border: rgba(15, 23, 42, 0.12);
    --ptp-text: #141b2f;
    --ptp-link: #0f62fe;
    --ptp-panel-bg: #aac8ff;
    --ptp-panel-border: rgba(15, 23, 42, 0.12);
    --ptp-panel-text: #141b2f;
    --ptp-editor-bg: #f4f6fb;
    --ptp-editor-border: #d1d5db;
    --ptp-editor-text: #111;
    --cs-primary-color: #edb40d;
    --cs-secondary-color: #007bff;
    --cs-gold-font: #d79b00;
    --cs-footer-bg: #212529;
    --cs-footer-text: #707070;
    --cs-footer-light: #ffffff;
    --ptp-lesson-texture: #eff4ff;
    --ptp-btn-text: var(--ptp-panel-text);
    --pc-inner-panel-bg: #4493f882;
    --ptc-tok-id: #232a2f;
    --ptp-text-muted: #575959;
    --ptp-button: #0f62fe;
}

[data-theme="blue"] {
    --ptp-body-bg: #14233f;
    --ptp-surface-bg: rgba(255, 255, 255, 0.04);
    --ptp-border: rgba(255, 255, 255, 0.15);
    --ptp-text: #f4f7ff;
    --ptp-link: #0f62fe;
    --ptp-panel-bg: #14306a;
    --ptp-panel-border: rgba(255, 255, 255, 0.2);
    --ptp-panel-text: #10011e;
    --ptp-editor-bg: #a3c4ff;
    --ptp-editor-border: rgba(255, 255, 255, 0.12);
    --ptp-editor-text: #f1f4ff;
    --cs-primary-color: #edb40d;
    --cs-secondary-color: #007bff;
    --cs-gold-font: #ceb00d;
    --cs-footer-bg: #212529;
    --cs-footer-text: #707070;
    --cs-footer-light: #ffffff;
    --ptp-lesson-texture: #aac8ff;
    --ptp-btn-text: #c3cde7;
    /* Legacy Code page palette kept for reference/custom use */
    --pc-legacy-stage-bg: #050f26;
    --pc-legacy-stage-border: rgba(255, 255, 255, 0.08);
    --pc-legacy-stage-shadow: 0 25px 60px rgba(0, 0, 0, 0.55);
    --pc-legacy-card-bg-1: #0c1b3e;
    --pc-legacy-card-bg-2: #152850;
    --pc-legacy-card-bg-3: #0b1634;
    --pc-legacy-card-border: rgba(255, 255, 255, 0.12);
    --pc-legacy-card-text: #dbe7ff;
    --pc-legacy-btn-bg: #0b4cb3;
    --pc-legacy-btn-border: rgba(77, 80, 94, 0.9);
    --pc-legacy-next-btn-bg: #0f2889;
    --pc-legacy-metric-bg: #091f4b;
    --pc-legacy-metric-border: rgba(255, 255, 255, 0.15);
    --pc-legacy-metric-text: #f2f5ff;
    --pc-legacy-description-bg: #0a1c40;
    --pc-legacy-description-text: #dfe8ff;
    --pc-legacy-pseudocode-bg: #07142f;
    --pc-legacy-pseudocode-border: rgba(255, 255, 255, 0.08);
    --pc-legacy-pause-overlay: rgba(2, 8, 26, 0.82);
    --pc-inner-panel-bg: #0a142f;
    --ptp-legacy-panel-bg: #0f2252;
    --pc-legacy-current-exercise-title: #8a8e9a;
    --ptc-tok-id: #141f28;
    --ptp-text-muted: #575959;
    --ptp-button: #0f62fe;
}

[data-theme="dark"] {
    --ptp-body-bg: #222526;
    --ptp-surface-bg: #242729;
    --ptp-border: rgba(255, 255, 255, 0.1);
    --ptp-text: #f3f5ff;
    --ptp-link: #0f62fe;
    --ptp-panel-bg: #2e3234;
    --ptp-panel-border: rgba(255, 255, 255, 0.08);
    --ptp-panel-text: #afafb0;
    --ptp-editor-bg: #1b1d1e;
    --ptp-editor-border: #11142a;
    --ptp-editor-text: #f7f9ff;
    --cs-primary-color: #edb40d;
    --cs-secondary-color: #007bff;
    --cs-gold-font: #ceb00d;
    --cs-footer-bg: #212529;
    --cs-footer-text: #707070;
    --cs-footer-light: #ffffff;
    --ptp-lesson-texture: #181919;
    --ptp-btn-text: #c3cde7;
    --pc-inner-panel-bg: #1b1d1e87;
    --ptc-tok-id: #838b91;
    --ptp-text-muted: #575959;
    --ptp-button: #0f62fe;
}

body {
    background: var(--ptp-body-bg);
    color: var(--ptp-text);
    font-family: Segoe UI, Roboto, Arial, sans-serif;
    margin: 0;
    padding-bottom: 0px;
    transition: background-color .25s ease, color .2s ease;
}

body h1, font {
    color: var(--ptp-text);
    font-family: Segoe UI, Roboto, Arial, sans-serif;
    margin: 0;
}

header.topbar {
    background: #ffffff33;
    border-bottom: 1px solid #e5e5e5;
    padding: 8px 0;
}

.logout-button {
    background: orange;
}

.topbar {
    background: var(--ptp-surface-bg);
    border-bottom: 1px solid var(--ptp-border);
    padding: 8px 0;
}

.topbar-inner {
    align-items: center;
    display: flex;
    justify-content: space-between;
    gap: 1rem;
    border-radius: 18px;
}

.topbar-inner nav {
    flex: 1;
}

.brand {
    font-weight: 700;
    align-self: start;
}

.brand h1 {
    color: var(--ptp-link);
    margin: 0;
}

.brand-link {
    text-decoration: none;
    color: inherit;
    display: inline-flex;
    align-items: center;
}

.main-nav {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.main-nav.collapsed { display: none; }

.nav-link {
    color: var(--ptp-text);
    padding: 6px;
    text-decoration: none;
}

.nav-link-contener {
    margin-right: 35px;
}

.main-nav .nav-link {
    border-bottom: 2px solid transparent;
}

    .main-nav .nav-link.active {
        border-bottom-color: var(--ptp-link);
        color: var(--cs-gold-font);
        font-weight: 600;
    }

.nav-link:focus, .nav-link:active {
    outline: 3px solid #6fa8dc;
}

.nav-toggle {
    background: none;
    border: 0;
    cursor: pointer;
    display: none;
    font-size: 24px;
    line-height: 1;
    margin-left: auto;
    padding: 4px;
}

.nav-toggle:focus { outline: 2px solid #007acc; }

.mobile-dropdown {
    display: none;
    position: relative;
}

.mobile-dropdown button {
    background: var(--ptp-panel-bg);
    border: 1px solid var(--ptp-panel-border);
    border-radius: 4px;
    color: var(--ptp-panel-text);
    cursor: pointer;
    padding: 6px 10px;
}

.mobile-dropdown[aria-expanded="true"] .dropdown-menu { display: block; }

.dropdown-menu {
    background: var(--ptp-panel-bg);
    border: 1px solid var(--ptp-panel-border);
    box-shadow: 0 2px 8px rgba(0, 0, 0, .35);
    display: none;
    left: 0;
    min-width: 180px;
    position: absolute;
    top: 100%;
    z-index: 1000;
}

.dropdown-menu a {
    color: var(--ptp-panel-text);
    display: block;
    padding: 8px 12px;
}

@media (max-width: 768px) {
    .nav-toggle { display: block; }

    .main-nav { flex-direction: column; }

    .main-nav.collapsed { display: none; }

    .mobile-dropdown { display: block; }
}

.online-badge {
    color: #555;
    font-size: 12px;
    margin-left: 12px;
}

html.offline .online-badge { color: #a00; }

header.topbar,
.site-footer,
.leftside,
.rightside,
.container.topbar-inner { background: var(--ptp-surface-bg); }

.topbar,
.site-footer,
.main-nav .nav-link {
    border-color: var(--ptp-border);
    color: var(--ptp-text);
}

a { color: var(--ptp-link); }

.theme-control {
    align-items: center;
    display: flex;
    gap: 0.35rem;
    margin-left: auto;
}

.theme-label {
    color: var(--ptp-text);
    font-size: 0.85rem;
    font-weight: 600;
    letter-spacing: 0.03em;
}

.theme-select {
    appearance: none;
    background: var(--ptp-panel-bg);
    border: 1px solid var(--ptp-panel-border);
    border-radius: 999px;
    color: var(--ptp-text);
    cursor: pointer;
    font-size: 0.95rem;
    padding: 0.35rem 0.9rem;
    transition: border-color 0.2s ease;
}

.theme-select:focus {
    outline: 2px solid var(--ptp-link);
    outline-offset: 2px;
}

/* updated container per home layout spec */

.container {
    margin: 0 auto;
    max-width: 1120px;
    padding: 16px;
}

.grid {
    display: grid;
    gap: 16px;
    grid-template-columns: 1fr;
    padding: 16px;
}

.leftside { display: none }

.rightside { display: none }

.maincontent { min-height: 70vh }

.site-footer {
    border-top: 1px solid #e5e5e5;
    padding: 12px;
}

/* unify button visuals per spec */

.btn {
    align-items: center;
    background: var(--ptp-panel-bg);
    border: 1px solid var(--ptp-panel-border);
    border-radius: 10px;
    color: var(--ptp-panel-text);
    cursor: pointer;
    display: inline-flex;
    gap: 8px;
    padding: 8px 12px;
}

.btn-spec {
    color: var(--ptp-btn-text);
}

.btn:hover { background: rgba(255, 255, 255, 0.08); }

.btn:focus { outline: 3px solid #6fa8dc }

.link {
    background: transparent;
    color: var(--ptp-link);
    text-decoration: underline;
}

/* responsive layout */

@media (min-width: 992px) {
    /* lg */
    .grid { }

    .leftside { }
}

@media (min-width: 1200px) {
    /* xl */
    .grid { }

    .rightside { }
}

/* Consent banner */

.consent-banner {
    background: var(--ptp-panel-bg);
    border: 1px solid var(--ptp-panel-border);
    border-radius: 6px;
    bottom: 16px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.25);
    color: var(--ptp-panel-text);
    display: none;
    left: 16px;
    padding: 12px;
    position: fixed;
    right: 16px;
}

.consent-inner {
    align-items: center;
    display: flex;
    gap: 12px;
    justify-content: space-between;
    flex-wrap: wrap;
}

.consent-content { flex: 1; min-width: 260px; }
.consent-content p { margin: 0; }

.consent-note {
    color: var(--ptp-text);
    opacity: 0.85;
    font-size: 0.9rem;
    margin-top: 0.35rem;
}


.consent-actions {
    align-items: flex-end;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.consent-buttons {
    display: flex;
    gap: 0.5rem;
}

.consent-links {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
    justify-content: flex-end;
}

.consent-actions a,
.consent-actions button {
    background: var(--ptp-panel-bg);
    border: 1px solid var(--ptp-panel-border);
    border-radius: 8px;
    color: var(--ptp-panel-text);
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.25rem;
    font-weight: 600;
    padding: 0.5rem 0.9rem;
    text-decoration: none;
    transition: background 0.2s ease, border-color 0.2s ease, color 0.2s ease, box-shadow 0.2s ease;
}

.consent-buttons .primary {
    background: var(--ptp-link);
    border-color: var(--ptp-link);
    color: #fff;
}

.consent-buttons .primary:hover {
    filter: brightness(0.85);
}

.consent-actions a,
.consent-actions button {
}

.consent-actions a:hover,
.consent-actions button:hover {
    background: rgba(255, 255, 255, 0.08);
    border-color: var(--ptp-link);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.consent-actions button:focus,
.consent-actions a:focus {
    outline: 2px solid var(--ptp-link);
    outline-offset: 2px;
}

/* Accessibility focus for buttons and links */

a:focus, button:focus {
    outline: 3px solid #6fa8dc;
    outline-offset: 2px;
}

/* Practice page styles */

.practice-root {
    padding: 16px;
    background: var(--ptp-panel-bg);
    border: 1px solid var(--ptp-panel-border);
    border-radius: 12px;
    color: var(--ptp-panel-text);
}

.practice-header {
    align-items: center;
    display: flex;
    gap: 12px;
    justify-content: space-between;
    margin-bottom: 12px;
}

.practice-controls {
    align-items: center;
    display: flex;
    gap: 12px;
}

.practice-frame {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.code-display {
    background: var(--ptp-editor-bg);
    border: 1px solid var(--ptp-editor-border);
    border-radius: 6px;
    min-height: 160px;
    overflow: auto;
    padding: 12px;
    color: var(--ptp-editor-text);
}

.code-display-inner {
    font-family: monospace;
    line-height: 1.4;
    white-space: pre-wrap;
    color: var(--ptp-editor-text);
}

.code-ch {
    display: inline-block;
    padding: 01px;
}

.code-ch .ws {
    font-style: normal;
    opacity: 0.6;
}

.code-ch--err {
    background: #fee;
    color: #900;
}

.code-ch--cursor {
    box-shadow: 002px rgba(0, 122, 204, 0.6);
    outline: 1px solid #007acc;
}

.code-ch--typed { opacity: 0.9; }

.typed-input textarea {
    background: var(--ptp-editor-bg);
    border: 1px solid var(--ptp-editor-border);
    border-radius: 6px;
    font-family: monospace;
    min-height: 120px;
    padding: 8px;
    width: 100%;
    color: var(--ptp-editor-text);
}

.stats-hud {
    background: var(--ptp-panel-bg);
    border: 1px solid var(--ptp-panel-border);
    border-radius: 6px;
    margin-top: 8px;
    padding: 8px;
    color: var(--ptp-panel-text);
}

.stats-row {
    align-items: center;
    display: flex;
    gap: 12px;
    justify-content: space-between;
}

.progress-wrap {
    background: rgba(255, 255, 255, 0.1);
    border-radius: 6px;
    flex: 1;
    height: 12px;
    margin-left: 8px;
    overflow: hidden;
}

.progress-bar {
    background: #007acc;
    height: 100%;
    width: 0%;
}

.visually-hidden {
    left: -9999px;
    position: absolute;
}

/* prevent horizontal scroll on small screens */

html, body { overflow-x: hidden }

/* theme: keep color only to preserve global background */

html.theme-light { color: #111 }

html.theme-blue,
html.theme-dark { color: #eee }

.site-footer {
    position: relative;
    padding-bottom: 1.5rem;
}

.footer-online-users {
    display: flex;
    gap: 0.4rem;
    font-size: 0.95rem;
    color: var(--ptp-link);
    font-weight: 500;
    margin-top: 10px;
}

.footer-online-users .footer-online-count {
    font-weight: 700;
}


/* Centrum Stylu footer */
.cs-footer {
    background-color: var(--cs-footer-bg);
    color: var(--cs-footer-text);
    padding: 3rem 0 4rem;
    font-family: 'Poppins', 'Segoe UI', sans-serif;
}

.cs-footer h5 {
    color: var(--cs-footer-light);
    font-size: 1.1rem;
    letter-spacing: 1px;
    margin-bottom: 1rem;
}

.cs-footer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 2rem;
    width: 100%;
    margin: 0;
}

.cs-footer-col {
    text-align: left;
}

.cs-footer-col--social {
    text-align: center;
}

.cs-footer-links {
    list-style: none;
    margin: 0;
    padding: 0;
    display: grid;
}

.cs-footer-links li {
    margin-bottom: 0.4rem;
}

.cs-footer-links a {
    color: var(--cs-footer-text);
    font-size: 0.9rem;
    letter-spacing: 0.05em;
    text-decoration: none;
    transition: color 0.3s ease;
}

.cs-footer-links a:hover,
.cs-footer-links a:focus {
    color: var(--cs-gold-font);
}

.cs-footer {
    padding: 0;
    margin: 0 0 1rem;
}

.cs-footer li {
    display: inline-block;
    margin: 0 0.25rem 0.5rem;
}

.cs-footer .fa-style {
    width: 40px;
    height: 40px;
    line-height: 40px;
    background-color: var(--cs-footer-light);
    color: var(--cs-footer-bg);
    border-radius: 30%;
    display: inline-block;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.cs-footer .fa-style:hover,
.cs-footer .fa-style:focus {
    transform: translateY(-2px);
    box-shadow: 0 6px 14px rgba(0, 0, 0, 0.3);
}

.cs-footer .copyright-text {
    color: var(--cs-footer-light);
    font-size: 0.9rem;
    line-height: 1.4;
}

.cs-footer .logo-image-contact-footer {
    max-width: 110px;
    height: auto;
    margin: 0.5rem auto 0;
    display: block;
}

.cs-footer .logo-link {
    display: inline-block;
}

.logo-link-footer {
    display: inline-block;
    font-family: Segoe UI, Roboto, Arial, sans-serif;
    font-weight: bold;
    text-decoration: none;
    font-size: x-large;
    margin: 0 10px;
}

 .logo-footer { 
}

.social-icons {
    margin: 0;
    padding: 0;
}

.footer-logos {
    display: inline-flex;
}

.social-icon {
    display: inline-block;
    background: #fff;
    color: #000;
    width: 28px;
    height: 28px;
    line-height: 30px;
    margin: 0 2px;
    border-radius: 5px;
    text-align: center;
    font-size: 14px;
}

.footer-logo-nas4tech {
    height: 40px;
}

textarea.smoke,
input.smoke {
    background: #bebebe;
}

#live-accuracy {
    display: none;
}

#difficultySelect {
    padding: 6px 14px;
    gap: 6px;
}

/*---------------------------------------
   Responsive styles            
-----------------------------------------*/

@media (max-width: 768px) {
    .cs-footer {
        text-align: center;
    }

    .cs-footer-col {
        text-align: center;
    }

    .cs-footer-grid {
        gap: 1.5rem;
    }

    .footer-logos {
        display: grid;
        margin-left: -25px;
    }

    .logo-link-footer {
        margin-bottom: 7px;
    }

    .footer-online-users {
        position: static;
        margin-top: 1rem;
        justify-content: center;
    }

    .nav-link-contener {
        margin-right: 0px;
        display: inline-grid;
        margin-bottom: 10px;
    }
}

@media (min-width: 768px) and (max-width: 1400px) {
    .footer-logos {
        display: grid;
    }
}
 

/* Mobile */
@media (max-width: 575px) {
}

/* Tablet */
@media (min-width: 576px) and (max-width: 991px) {
}

/* Small desktop */
@media (min-width: 992px) and (max-width: 1199px) {
    .container {
        max-width: 985px;
    }
}

/* Desktop */
@media (min-width: 1200px) {
}