/* ==========================================================================
   Vysoká škola Erazim – one-pager
   Branding navazuje na IS Erazim (templates/layout/verejne.php + app.css)
   ========================================================================== */

:root {
    --erazim-cervena:  #ef3120;
    --erazim-oranzova: #f47216;
    --erazim-zluta:    #fbbc09;
    --erazim-zelena:   #73c82c;
    --erazim-modra:    #2d71c1;
    --erazim-modra-dark: #245ea8;
    --erazim-fialova:  #8b359f;

    --ink: #1f2933;
    --ink-muted: #52606d;
    --paper: #ffffff;
    --paper-alt: #f7f8fa;
    --border: #e3e6eb;

    --radius: 0.75rem;
    --shadow-sm: 0 0.125rem 0.25rem rgba(0, 0, 0, 0.06);
    --shadow-md: 0 0.75rem 1.5rem rgba(31, 41, 51, 0.08);
}

/* Base
   ---------------------------------------------------------------------------- */

html {
    scroll-behavior: smooth;
    scroll-padding-top: 80px;
}

body {
    font-family: "Helvetica Neue", Helvetica, Arial, sans-serif;
    color: var(--ink);
    background: var(--paper);
    padding-top: 64px;
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4, h5, h6,
.navbar-brand, .navbar-nav, .nav-projekty .btn,
.kicker, .hero-disclaimer em, .accordion-button {
    font-family: "Raleway", "Helvetica Neue", Helvetica, Arial, sans-serif;
}

h1, h2, h3 {
    color: var(--ink);
    font-weight: 700;
    line-height: 1.2;
}

h1 {
    font-size: clamp(2rem, 4.5vw, 3.25rem);
    letter-spacing: -0.015em;
    margin-bottom: 1rem;
}

h2 {
    font-size: clamp(1.75rem, 3vw, 2.25rem);
    margin-bottom: 1.25rem;
    letter-spacing: -0.01em;
}

h3 {
    font-size: 1.2rem;
    margin-bottom: 0.5rem;
}

p {
    margin-bottom: 1rem;
    color: var(--ink-muted);
}

a { color: var(--erazim-modra); }
a:hover { color: var(--erazim-modra-dark); }

/* Navbar
   ---------------------------------------------------------------------------- */

.navbar-erazim {
    background: linear-gradient(
        90deg,
        var(--erazim-cervena)  0%,     var(--erazim-cervena)  16.67%,
        var(--erazim-oranzova) 16.67%, var(--erazim-oranzova) 33.33%,
        var(--erazim-zluta)    33.33%, var(--erazim-zluta)    50%,
        var(--erazim-zelena)   50%,    var(--erazim-zelena)   66.67%,
        var(--erazim-modra)    66.67%, var(--erazim-modra)    83.33%,
        var(--erazim-fialova)  83.33%, var(--erazim-fialova)  100%
    );
    min-height: 64px;
    box-shadow: 0 2px 6px rgba(0,0,0,0.08);
}

.navbar-erazim .navbar-brand img {
    height: 40px;
    width: auto;
    object-fit: contain;
}

.navbar-erazim .nav-link {
    color: #fff;
    font-weight: 500;
    padding: 0.5rem 0.9rem;
    border-radius: 0.375rem;
    transition: background 120ms ease;
}

.navbar-erazim .nav-link:hover,
.navbar-erazim .nav-link:focus {
    background: rgba(255,255,255,0.15);
    color: #fff;
}

.nav-projekty .btn {
    border-color: rgba(255,255,255,0.7);
    color: #fff;
    font-weight: 500;
}

.nav-projekty .btn:hover,
.nav-projekty .btn:focus,
.nav-projekty .btn.show {
    background: rgba(255,255,255,0.15);
    color: #fff;
    border-color: #fff;
}

.nav-projekty .dropdown-menu {
    border: none;
    box-shadow: var(--shadow-md);
    border-radius: var(--radius);
    padding: 0.5rem;
    min-width: 260px;
}

.nav-projekty .dropdown-item {
    border-radius: 0.375rem;
    padding: 0.5rem 0.75rem;
    color: var(--ink);
}

.nav-projekty .dropdown-item:hover,
.nav-projekty .dropdown-item:focus {
    background: var(--paper-alt);
    color: var(--erazim-modra);
}

@media (max-width: 991.98px) {
    .navbar-erazim .navbar-collapse {
        background: rgba(255,255,255,0.97);
        margin: 0.75rem -0.75rem -0.5rem;
        padding: 1rem 1.25rem;
        border-radius: 0 0 var(--radius) var(--radius);
        color: var(--ink);
    }
    .navbar-erazim .nav-link { color: var(--ink); }
    .navbar-erazim .nav-link:hover { background: var(--paper-alt); color: var(--erazim-modra); }
    .nav-projekty .btn { color: var(--ink); border-color: var(--border); }
    .nav-projekty { margin-top: 0.5rem; }
}

/* Hero
   ---------------------------------------------------------------------------- */

.hero-section {
    position: relative;
    padding: 4rem 0 3.5rem;
    background:
        radial-gradient(ellipse at 85% 10%, rgba(45,113,193,0.08), transparent 60%),
        radial-gradient(ellipse at 10% 90%, rgba(139,53,159,0.06), transparent 55%),
        var(--paper);
    overflow: hidden;
}

.hero-section::after {
    content: "";
    position: absolute;
    left: 0; right: 0; bottom: 0;
    height: 4px;
    background: linear-gradient(
        90deg,
        var(--erazim-cervena), var(--erazim-oranzova), var(--erazim-zluta),
        var(--erazim-zelena),  var(--erazim-modra),    var(--erazim-fialova)
    );
}

.hero-inner { max-width: 820px; }

.kicker {
    display: inline-block;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    font-weight: 700;
    font-size: 0.8rem;
    color: var(--erazim-modra);
    background: rgba(45,113,193,0.1);
    padding: 0.35rem 0.75rem;
    border-radius: 999px;
    margin-bottom: 1.25rem;
}

.hero-section .lead {
    font-size: 1.2rem;
    color: var(--ink-muted);
    margin-bottom: 2rem;
}

.hero-cta {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
    margin-bottom: 1.25rem;
}

.hero-cta .btn { padding: 0.75rem 1.5rem; font-weight: 600; }

.hero-disclaimer {
    font-size: 0.9rem;
    color: var(--ink-muted);
    max-width: 620px;
}

@media (max-width: 575.98px) {
    .hero-cta .btn { width: 100%; }
}

/* Sections
   ---------------------------------------------------------------------------- */

.section {
    padding: 4rem 0;
}

.section-alt {
    background: var(--paper-alt);
}

.section h2 + p,
.section-intro {
    max-width: 760px;
    font-size: 1.05rem;
}

.section-intro {
    color: var(--ink-muted);
    margin-top: -0.5rem;
}

/* V čem jsme jiní - features
   ---------------------------------------------------------------------------- */

.feature {
    height: 100%;
    padding: 1.5rem;
    background: var(--paper);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    transition: transform 180ms ease, box-shadow 180ms ease;
}

.feature:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.feature h3 {
    color: var(--erazim-modra);
    margin-bottom: 0.5rem;
}

.feature p { margin-bottom: 0; }

/* Steps list (Jak studium vypadá)
   ---------------------------------------------------------------------------- */

.steps-list {
    list-style: none;
    counter-reset: steps;
    padding: 0;
    max-width: 860px;
    margin: 2rem 0 0;
}

.steps-list > li {
    counter-increment: steps;
    position: relative;
    padding: 1rem 0 1.5rem 3.5rem;
    border-left: 2px solid var(--border);
    margin-left: 1rem;
}

.steps-list > li:last-child { border-left-color: transparent; padding-bottom: 0; }

.steps-list > li::before {
    content: counter(steps);
    position: absolute;
    left: -1.25rem;
    top: 0.75rem;
    width: 2.5rem;
    height: 2.5rem;
    border-radius: 50%;
    background: var(--erazim-modra);
    color: #fff;
    font-family: "Raleway", sans-serif;
    font-weight: 700;
    display: grid;
    place-items: center;
    box-shadow: 0 2px 6px rgba(45,113,193,0.3);
}

.steps-list h3 {
    margin-bottom: 0.35rem;
    color: var(--ink);
}

/* Subject cards (Co se naučíte)
   ---------------------------------------------------------------------------- */

.subject-card {
    height: 100%;
    padding: 1.5rem;
    background: var(--paper);
    border-radius: var(--radius);
    box-shadow: var(--shadow-sm);
    display: flex;
    flex-direction: column;
}

.subject-card h3 {
    color: var(--erazim-fialova);
    margin-bottom: 0.75rem;
}

.subject-short,
.subject-full p {
    color: var(--ink-muted);
}

.subject-full p:last-child { margin-bottom: 0; }

.subject-toggle {
    align-self: flex-start;
    padding: 0.25rem 0 0 0;
    color: var(--erazim-modra);
    text-decoration: none;
    font-weight: 600;
    margin-top: auto;
}

.subject-toggle:hover {
    color: var(--erazim-modra-dark);
    text-decoration: underline;
}

.subject-toggle::after {
    content: " \203A";
    display: inline-block;
    transition: transform 200ms ease;
}

.subject-toggle[aria-expanded="true"]::after {
    transform: rotate(90deg);
}

/* Školné
   ---------------------------------------------------------------------------- */

.skolne-box {
    max-width: 720px;
    margin: 0 auto;
    padding: 2rem;
    background: linear-gradient(135deg, rgba(45,113,193,0.05), rgba(139,53,159,0.05));
    border-radius: var(--radius);
    text-align: center;
}

.skolne-castka {
    font-size: 1.4rem;
    margin: 1rem 0 1.25rem;
}

.skolne-castka strong {
    font-size: 2rem;
    color: var(--erazim-modra);
    display: inline-block;
    margin: 0 0.25rem;
}

.pilot-note {
    margin-top: 1.25rem;
    padding: 0.75rem 1rem;
    background: rgba(251,188,9,0.15);
    border-radius: 0.5rem;
    color: var(--ink);
    display: inline-block;
    margin-bottom: 0;
}

/* Zájem – dvě paralelní karty
   ---------------------------------------------------------------------------- */

.zajem-card {
    height: 100%;
    padding: 2rem;
    background: var(--paper);
    border-radius: var(--radius);
    box-shadow: var(--shadow-sm);
    border-top: 4px solid var(--erazim-modra);
    display: flex;
    flex-direction: column;
}

.zajem-card h3 {
    color: var(--ink);
    margin-bottom: 1rem;
    font-size: 1.35rem;
}

.zajem-card p { flex: 1; }

.zajem-card .btn { align-self: flex-start; margin-top: 0.5rem; font-weight: 600; }

.zajem-card:nth-child(2) { border-top-color: var(--erazim-fialova); }

/* Tlačítka (override Bootstrap dle Erazim brand)
   ---------------------------------------------------------------------------- */

.btn-primary {
    background: var(--erazim-modra);
    border-color: var(--erazim-modra);
}

.btn-primary:hover,
.btn-primary:focus {
    background: var(--erazim-modra-dark);
    border-color: var(--erazim-modra-dark);
}

.btn-outline-primary {
    color: var(--erazim-modra);
    border-color: var(--erazim-modra);
}

.btn-outline-primary:hover,
.btn-outline-primary:focus {
    background: var(--erazim-modra);
    border-color: var(--erazim-modra);
    color: #fff;
}

.btn:focus-visible {
    box-shadow: 0 0 0 0.25rem rgba(45,113,193,0.25);
}

/* FAQ accordion
   ---------------------------------------------------------------------------- */

.faq-accordion .accordion-item {
    border: 1px solid var(--border);
    border-radius: var(--radius) !important;
    margin-bottom: 0.75rem;
    overflow: hidden;
    background: var(--paper);
}

.faq-accordion .accordion-button {
    font-weight: 600;
    color: var(--ink);
    background: var(--paper);
    padding: 1rem 1.25rem;
}

.faq-accordion .accordion-button:not(.collapsed) {
    color: var(--erazim-modra);
    background: rgba(45,113,193,0.06);
    box-shadow: none;
}

.faq-accordion .accordion-button:focus {
    box-shadow: 0 0 0 0.2rem rgba(45,113,193,0.2);
    border-color: transparent;
}

.faq-accordion .accordion-body {
    padding: 0 1.25rem 1.25rem;
    color: var(--ink-muted);
}

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

.footer-erazim {
    padding: 2.5rem 0;
    background: var(--paper-alt);
    border-top: 1px solid var(--border);
    text-align: center;
    color: var(--ink-muted);
    position: relative;
}

.footer-erazim::before {
    content: "";
    position: absolute;
    left: 0; right: 0; top: 0;
    height: 3px;
    background: linear-gradient(
        90deg,
        var(--erazim-cervena), var(--erazim-oranzova), var(--erazim-zluta),
        var(--erazim-zelena),  var(--erazim-modra),    var(--erazim-fialova)
    );
}

.footer-erazim a {
    color: var(--ink);
    text-decoration: none;
}

.footer-erazim a:hover { color: var(--erazim-modra); text-decoration: underline; }

/* Utilities
   ---------------------------------------------------------------------------- */

@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
}

::selection {
    background: rgba(45,113,193,0.25);
    color: var(--ink);
}