:root {
    --su-blue: #003366;
    --su-blue-dark: #002244;
    --su-gold: #c69214;
    --su-burgundy: #8b1528;
    --su-gray-bg: #f4f6f9;
    --su-card-bg: #ffffff;
    --su-border: #dbe2ea;
    --su-text: #1a2530;
    --su-muted: #5a6b7c;
    --su-success: #1b6d38;
    --su-success-bg: #edf7f0;
    --su-error-bg: #fdf2f2;
    --su-warning-bg: #fffbf0;
    --su-warning-border: #f6d896;
    --radius-default: 8px;
    --shadow-elevation: 0 4px 16px rgba(0, 51, 102, 0.08), 0 1px 3px rgba(0, 0, 0, 0.05);
    --font-scale: 1rem;
}

/* Режим за дислексия / СОП */
body.font-dyslexic {
    font-family: "Comic Sans MS", "Arial Rounded MT Bold", sans-serif !important;
    letter-spacing: 0.05em;
    word-spacing: 0.1em;
    line-height: 1.8;
}

/* Режим Висок Контраст (WCAG AAA) */
body.high-contrast {
    --su-gray-bg: #000000;
    --su-card-bg: #121212;
    --su-border: #ffff00;
    --su-text: #ffffff;
    --su-muted: #ffff88;
    --su-blue: #ffff00;
    --su-blue-dark: #ffff55;
    --su-gold: #ffffff;
    --su-burgundy: #ff6666;
    --su-success: #55ff55;
    --su-success-bg: #003300;
    --su-error-bg: #330000;
    --su-warning-bg: #222200;
    --su-warning-border: #ffff00;
}

body.high-contrast .portal-header {
    background: #000000;
    border-bottom: 3px solid #ffff00;
}

body.high-contrast .portal-logo {
    filter: brightness(0) invert(1);
}

body.high-contrast .nav-tab-btn[aria-selected="true"] {
    background-color: #ffff00 !important;
    color: #000000 !important;
}

body.high-contrast .btn-submit,
body.high-contrast .btn-access {
    background-color: #ffff00 !important;
    color: #000000 !important;
    border: 2px solid #ffffff;
    font-weight: 800;
}

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

html {
    font-size: var(--font-scale);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    background-color: var(--su-gray-bg);
    color: var(--su-text);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 24px 16px;
    transition: background-color 0.2s, color 0.2s;
}

/* Skip link за екранни четци */
.skip-link {
    position: absolute;
    top: -50px;
    left: 10px;
    background: var(--su-blue);
    color: #ffffff;
    padding: 10px 18px;
    z-index: 10000;
    border-radius: var(--radius-default);
    font-weight: 700;
    text-decoration: none;
    transition: top 0.2s ease;
}

.skip-link:focus {
    top: 10px;
    outline: 3px solid var(--su-gold);
}

/* Панел за достъпност */
.a11y-bar {
    width: 100%;
    max-width: 680px;
    display: flex;
    justify-content: flex-end;
    align-items: center;
    gap: 6px;
    margin-bottom: 8px;
    font-size: 0.82rem;
    flex-wrap: wrap;
}

.a11y-btn {
    background: var(--su-card-bg);
    border: 1px solid var(--su-border);
    color: var(--su-text);
    padding: 5px 9px;
    border-radius: 4px;
    cursor: pointer;
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    gap: 4px;
    font-size: 0.8rem;
    transition: all 0.2s;
}

.a11y-btn:hover {
    border-color: var(--su-blue);
    color: var(--su-blue);
}

.a11y-btn[aria-pressed="true"] {
    background: var(--su-blue);
    color: #ffffff;
    border-color: var(--su-blue);
}

/* Основен контейнер */
.portal-wrapper {
    width: 100%;
    max-width: 680px;
    background: var(--su-card-bg);
    border-radius: var(--radius-default);
    border: 1px solid var(--su-border);
    box-shadow: var(--shadow-elevation);
    overflow: hidden;
    margin-bottom: 24px;
}

/* Шапка и лого */
.portal-header {
    background: linear-gradient(180deg, var(--su-blue) 0%, var(--su-blue-dark) 100%);
    color: #ffffff;
    padding: 24px 20px 20px;
    text-align: center;
    border-bottom: 3px solid var(--su-gold);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
}

.portal-logo-link {
    display: inline-block;
    line-height: 0;
}

.portal-logo {
    max-height: 75px;
    width: auto;
    display: block;
    filter: drop-shadow(0 2px 4px rgba(0, 0, 0, 0.2));
    transition: transform 0.2s ease;
}

.portal-logo-link:hover .portal-logo {
    transform: scale(1.02);
}

.header-text-group {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.portal-header h1 {
    font-family: "Times New Roman", Georgia, serif;
    font-size: 1.45rem;
    font-weight: bold;
    line-height: 1.3;
}

.portal-header p {
    font-size: 0.82rem;
    color: var(--su-gold);
    margin-top: 6px;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    font-weight: 600;
}

/* Навигация / Табове */
.nav-tabs {
    display: flex;
    background-color: #eaeff5;
    border-bottom: 1px solid var(--su-border);
}

.nav-tab-btn {
    flex: 1;
    text-align: center;
    font-size: 0.9rem;
    font-weight: 600;
    padding: 13px 8px;
    color: var(--su-muted);
    background: transparent;
    border: none;
    cursor: pointer;
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    border-bottom: 3px solid transparent;
    font-family: inherit;
}

.nav-tab-btn:hover {
    color: var(--su-blue);
    background-color: #dfe6ef;
}

.nav-tab-btn[aria-selected="true"] {
    color: var(--su-blue);
    background-color: var(--su-card-bg);
    border-bottom: 3px solid var(--su-blue);
}

.portal-body {
    padding: 28px 24px;
}

.tab-panel {
    display: none;
}

.tab-panel:not([hidden]) {
    display: block;
}

.section-title {
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--su-blue-dark);
    margin-bottom: 12px;
    text-align: center;
}

.lead-text {
    font-size: 0.95rem;
    line-height: 1.55;
    color: var(--su-text);
    margin-bottom: 20px;
}

/* Форми и полета */
.form-group {
    margin-bottom: 18px;
}

.hp-field {
    opacity: 0;
    position: absolute;
    top: 0;
    left: 0;
    height: 0;
    width: 0;
    z-index: -1;
    pointer-events: none;
}

label {
    display: block;
    font-size: 0.88rem;
    font-weight: 600;
    color: var(--su-blue-dark);
    margin-bottom: 6px;
}

.field-hint {
    display: block;
    font-size: 0.78rem;
    color: var(--su-muted);
    margin-top: 5px;
    line-height: 1.4;
}

.input-container {
    position: relative;
    display: flex;
    align-items: center;
}

input[type="text"],
input[type="password"] {
    width: 100%;
    padding: 12px 14px;
    font-size: 1rem;
    color: var(--su-text);
    background-color: #ffffff;
    border: 1.5px solid var(--su-border);
    border-radius: var(--radius-default);
    transition: border-color 0.2s, box-shadow 0.2s;
}

body.high-contrast input {
    background-color: #000000;
    color: #ffffff;
}

.input-container input {
    padding-right: 44px;
}

input[type="text"]:focus,
input[type="password"]:focus {
    outline: none;
    border-color: var(--su-blue);
    box-shadow: 0 0 0 3px rgba(0, 51, 102, 0.15);
}

body.high-contrast input:focus {
    box-shadow: 0 0 0 3px #ffff00;
}

.toggle-pwd-btn {
    position: absolute;
    right: 8px;
    background: none;
    border: none;
    padding: 6px;
    cursor: pointer;
    color: var(--su-muted);
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 4px;
}

.btn-submit {
    width: 100%;
    padding: 14px;
    background-color: var(--su-blue);
    color: #ffffff;
    font-size: 1rem;
    font-weight: 600;
    border: none;
    border-radius: var(--radius-default);
    cursor: pointer;
    transition: background-color 0.2s;
    margin-top: 8px;
}

.btn-submit:hover {
    background-color: var(--su-blue-dark);
}

/* Съобщения и информационни кутии */
.alert-box {
    padding: 16px 18px;
    border-radius: var(--radius-default);
    margin-bottom: 22px;
    font-size: 0.92rem;
    line-height: 1.5;
}

.alert-box.success {
    background-color: var(--su-success-bg);
    border: 1px solid #bce1c7;
    color: var(--su-success);
}

.alert-box.error {
    background-color: var(--su-error-bg);
    border: 1px solid #f8c9c9;
    color: var(--su-burgundy);
    text-align: center;
}

.user-tag {
    display: inline-block;
    background: #ffffff;
    padding: 4px 12px;
    border-radius: 4px;
    border: 1px solid #bce1c7;
    font-size: 1.15rem;
    color: var(--su-blue);
    margin: 6px 0 10px;
}

body.high-contrast .user-tag {
    background: #000000;
    color: #ffff00;
    border-color: #ffff00;
}

.warning-callout {
    background-color: #fef2f2;
    border: 1.5px solid #f87171;
    border-radius: 6px;
    padding: 12px 14px;
    margin: 10px 0 12px;
    color: #991b1b;
    font-size: 0.88rem;
    line-height: 1.5;
}

body.high-contrast .warning-callout {
    background: #330000;
    color: #ff9999;
    border-color: #ff4444;
}

.important-box {
    background-color: #fff9e6;
    border-left: 4px solid var(--su-gold);
    border-radius: 0 var(--radius-default) var(--radius-default) 0;
    padding: 14px 16px;
    margin-bottom: 20px;
    font-size: 0.92rem;
    line-height: 1.5;
}

body.high-contrast .important-box {
    background: #222200;
    border-left-color: #ffff00;
}

.security-card {
    background-color: var(--su-warning-bg);
    border: 1px solid var(--su-warning-border);
    border-radius: var(--radius-default);
    padding: 16px 18px;
    margin-bottom: 22px;
    font-size: 0.88rem;
    line-height: 1.5;
}

.security-title {
    font-weight: 700;
    color: var(--su-burgundy);
    font-size: 0.94rem;
    margin-bottom: 8px;
}

.security-list {
    padding-left: 20px;
    margin-top: 6px;
    color: var(--su-text);
}

.steps-box {
    background: #fafbfc;
    border: 1px solid var(--su-border);
    border-radius: var(--radius-default);
    padding: 20px;
    margin-bottom: 22px;
}

body.high-contrast .steps-box {
    background: #181818;
}

.email-format-wrapper {
    text-align: center;
    margin: 16px 0 10px;
}

.email-badge {
    display: inline-block;
    background: #ffffff;
    border: 1.5px dashed var(--su-blue);
    padding: 8px 16px;
    border-radius: 6px;
    font-family: monospace;
    font-size: 1.05rem;
    font-weight: bold;
    color: var(--su-blue);
}

body.high-contrast .email-badge {
    background: #000000;
    color: #ffff00;
    border-color: #ffff00;
}

.btn-access {
    display: inline-block;
    background-color: var(--su-blue);
    color: #ffffff;
    padding: 13px 24px;
    border-radius: var(--radius-default);
    font-weight: 600;
    font-size: 1rem;
    text-decoration: none;
    transition: background-color 0.2s;
    margin-top: 10px;
    text-align: center;
}

/* Таблици и стъпки */
.param-table-card {
    background: #fafbfc;
    border: 1px solid var(--su-border);
    border-radius: var(--radius-default);
    padding: 14px 16px;
    margin-bottom: 24px;
}

body.high-contrast .param-table-card {
    background: #181818;
}

.table-params {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.85rem;
}

.table-params td, .table-params th {
    padding: 8px 10px;
    border: 1px solid var(--su-border);
    text-align: left;
}

.table-params th {
    background: #edf2f7;
    color: var(--su-blue-dark);
    width: 40%;
}

body.high-contrast .table-params th {
    background: #2a2a2a;
    color: #ffff00;
}

.step-container {
    display: flex;
    flex-direction: column;
    gap: 20px;
    margin-top: 10px;
}

.step-card {
    background: #ffffff;
    border: 1px solid var(--su-border);
    border-radius: var(--radius-default);
    padding: 16px 18px 12px;
}

body.high-contrast .step-card {
    background: #181818;
}

.step-header {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    margin-bottom: 10px;
}

.step-num {
    background-color: var(--su-blue);
    color: #ffffff;
    min-width: 26px;
    height: 26px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.85rem;
    font-weight: 700;
    margin-top: 2px;
}

body.high-contrast .step-num {
    background: #ffff00;
    color: #000000;
}

.step-title {
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--su-blue-dark);
    line-height: 1.45;
}

.step-desc {
    font-size: 0.9rem;
    line-height: 1.55;
    color: var(--su-text);
    margin-bottom: 10px;
}

.step-desc ul {
    padding-left: 20px;
    margin-top: 6px;
}

.img-wrapper {
    text-align: center;
    margin: 10px 0;
    background: #f8fafc;
    border: 1px solid var(--su-border);
    border-radius: 6px;
    padding: 8px;
}

body.high-contrast .img-wrapper {
    background: #000000;
}

.img-wrapper img {
    max-width: 100%;
    height: auto;
    border-radius: 4px;
    display: inline-block;
}

/* FAQ елементи */
.context-faq {
    margin-top: 28px;
    padding-top: 20px;
    border-top: 1px solid var(--su-border);
}

.context-faq-title {
    font-size: 0.9rem;
    font-weight: 700;
    color: var(--su-blue-dark);
    text-transform: uppercase;
    letter-spacing: 0.04em;
    margin-bottom: 12px;
}

details {
    margin-bottom: 10px;
    border: 1px solid var(--su-border);
    border-radius: 6px;
    background: #fafbfc;
    padding: 10px 14px;
    font-size: 0.86rem;
}

body.high-contrast details {
    background: #181818;
}

details[open] {
    background: #ffffff;
}

body.high-contrast details[open] {
    background: #222222;
}

summary {
    font-weight: 600;
    color: var(--su-blue);
    cursor: pointer;
    user-select: none;
    list-style: none;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

summary::-webkit-details-marker {
    display: none;
}

summary::after {
    content: '+';
    font-size: 1.1rem;
    font-weight: bold;
    color: var(--su-muted);
}

details[open] summary::after {
    content: '−';
}

.details-body {
    margin-top: 8px;
    line-height: 1.55;
    color: var(--su-text);
    border-top: 1px dashed var(--su-border);
    padding-top: 8px;
}

/* Долен панел за университетски услуги */
.services-hub {
    width: 100%;
    max-width: 680px;
    margin-top: 8px;
}

.hub-title {
    font-size: 0.95rem;
    font-weight: 700;
    color: var(--su-blue-dark);
    text-align: center;
    margin-bottom: 14px;
    text-transform: uppercase;
    letter-spacing: 0.04em;
}

.hub-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 12px;
}

.hub-card {
    background: #ffffff;
    border: 1px solid var(--su-border);
    border-radius: var(--radius-default);
    padding: 14px 16px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.02);
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}

body.high-contrast .hub-card {
    background: #181818;
}

.hub-card h3 {
    font-size: 0.95rem;
    color: var(--su-blue-dark);
    margin-bottom: 4px;
}

.hub-card p {
    font-size: 0.84rem;
    color: var(--su-muted);
    line-height: 1.45;
    margin-bottom: 8px;
}

.hub-card a {
    font-size: 0.82rem;
    font-weight: 700;
    color: var(--su-blue);
    text-decoration: underline;
}

/* Футър */
.portal-footer {
    margin-top: 24px;
    text-align: center;
    font-size: 0.82rem;
    color: var(--su-muted);
    line-height: 1.6;
}

.portal-footer a {
    color: var(--su-blue);
    text-decoration: none;
    font-weight: 600;
}

/* Помощни класове (заместващи инлайн стиловете) */
.text-center { 
    text-align: center; 
}

.mt-4 { 
    margin-top: 4px; 
}

.info-block { 
    font-size: 0.84rem; 
    margin-top: 8px; 
}

.nested-list { 
    padding-left: 20px; 
    margin-top: 4px; 
}

.link-burgundy { 
    color: var(--su-burgundy); 
    font-weight: bold; 
    text-decoration: underline; 
}

.link-burgundy-bold { 
    color: var(--su-burgundy); 
    font-weight: bold; 
}

.email-format-sub { 
    font-size: 0.85rem; 
    color: var(--su-muted); 
    margin-bottom: 6px; 
}

.access-btn-wrapper { 
    text-align: center; 
    margin-top: 14px; 
}

.eye-icon { 
    display: block; 
}

.eye-icon.is-hidden { 
    display: none; 
}

/* Респонсив правила */
@media (min-width: 560px) {
    .hub-grid {
        grid-template-columns: 1fr 1fr;
    }
}

@media (max-width: 480px) {
    .portal-logo {
        max-height: 60px;
    }
    .portal-header h1 {
        font-size: 1.2rem;
    }
    .nav-tab-btn {
        font-size: 0.82rem;
        padding: 10px 4px;
    }
    .portal-body {
        padding: 20px 14px;
    }
    .btn-access {
        width: 100%;
    }
}