/* ==========================================================================
   Tapid — main.css
   Zdieľané základy: reset, farby, typografia, tlačidlá, formuláre.
   Načítava sa na KAŽDEJ stránke, pred stránkovo-špecifickým CSS.
   ========================================================================== */

:root {
    /* --- Farby --- */
    --color-bg: #09090B;
    --color-surface: #111113;
    --color-surface-elevated: #17171A;
    --color-border: #26262B;
    --color-text: #FAFAFA;
    --color-text-secondary: #A1A1AA;
    --color-text-muted: #71717A;
    --color-accent: #4F7CFF;
    --color-accent-hover: #6B8FFF;
    --color-success: #22C55E;
    --color-warning: #F59E0B;
    --color-danger: #EF4444;
    --color-danger-hover: #F87171;

    /* --- Typografia --- */
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-size-xs: 0.8125rem;
    --font-size-sm: 0.9375rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.5rem;
    --font-size-2xl: 2rem;
    --font-size-3xl: 2.75rem;
    --font-size-4xl: 3.75rem;
    --line-height-tight: 1.15;
    --line-height-normal: 1.55;

    /* --- Rozostupy --- */
    --space-1: 4px;
    --space-2: 8px;
    --space-3: 12px;
    --space-4: 16px;
    --space-5: 24px;
    --space-6: 32px;
    --space-7: 48px;
    --space-8: 64px;

    /* --- Tvar --- */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-full: 999px;

    /* --- Pohyb --- */
    --transition-fast: 150ms ease;
    --transition-base: 200ms ease;

    /* --- Tiene --- */
    --shadow-elevated: 0 8px 24px rgba(0, 0, 0, 0.35);
}

/* --- Reset --- */
*, *::before, *::after {
    box-sizing: border-box;
}

html {
    -webkit-text-size-adjust: 100%;
}

body {
    margin: 0;
    background: var(--color-bg);
    color: var(--color-text);
    font-family: var(--font-sans);
    font-size: var(--font-size-base);
    line-height: var(--line-height-normal);
    -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4, p, figure, blockquote {
    margin: 0;
}

img {
    max-width: 100%;
    display: block;
}

a {
    color: inherit;
    text-decoration: none;
}

button, input, select, textarea {
    font-family: inherit;
    font-size: inherit;
    color: inherit;
}

button {
    cursor: pointer;
}

ul {
    list-style: none;
    margin: 0;
    padding: 0;
}

/* --- Prístupnosť: viditeľný focus stav --- */
:focus-visible {
    outline: 2px solid var(--color-accent);
    outline-offset: 2px;
    border-radius: var(--radius-sm);
}

@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* --- Typografická hierarchia --- */
h1 {
    font-size: var(--font-size-3xl);
    font-weight: 700;
    line-height: var(--line-height-tight);
    letter-spacing: -0.02em;
}

h2 {
    font-size: var(--font-size-2xl);
    font-weight: 600;
    line-height: var(--line-height-tight);
    letter-spacing: -0.01em;
}

h3 {
    font-size: var(--font-size-lg);
    font-weight: 600;
    line-height: var(--line-height-tight);
}

/* --- Tlačidlá --- */
.btn-primary,
.btn-secondary,
.btn-danger {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    padding: 12px 20px;
    border-radius: var(--radius-md);
    border: 1px solid transparent;
    font-size: var(--font-size-sm);
    font-weight: 600;
    transition: background-color var(--transition-fast), border-color var(--transition-fast), transform var(--transition-fast);
    white-space: nowrap;
}

.btn-primary {
    background: var(--color-accent);
    color: #FFFFFF;
}

.btn-primary:hover {
    background: var(--color-accent-hover);
}

.btn-primary:active {
    transform: scale(0.98);
}

.btn-secondary {
    background: var(--color-surface-elevated);
    color: var(--color-text);
    border-color: var(--color-border);
}

.btn-secondary:hover {
    border-color: var(--color-text-secondary);
}

.btn-danger {
    background: transparent;
    color: var(--color-danger);
    border-color: var(--color-danger);
}

.btn-danger:hover {
    background: var(--color-danger);
    color: #FFFFFF;
}

button:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.link-button {
    background: none;
    border: none;
    padding: 0;
    color: var(--color-text-secondary);
    font-size: var(--font-size-sm);
    text-decoration: underline;
    text-underline-offset: 2px;
}

.link-button:hover {
    color: var(--color-text);
}

/* --- Formuláre --- */
label {
    display: block;
    font-size: var(--font-size-sm);
    font-weight: 500;
    color: var(--color-text-secondary);
    margin-top: var(--space-4);
    margin-bottom: var(--space-2);
}

label:first-child {
    margin-top: 0;
}

input[type="text"],
input[type="email"],
input[type="password"],
input[type="url"],
input[type="tel"],
input[type="file"],
select,
textarea {
    width: 100%;
    padding: 12px 14px;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    color: var(--color-text);
    transition: border-color var(--transition-fast);
}

input:focus,
select:focus,
textarea:focus {
    border-color: var(--color-accent);
}

textarea {
    resize: vertical;
    min-height: 90px;
}

input[type="range"] {
    width: 100%;
    accent-color: var(--color-accent);
}

.checkbox-label {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
    margin-top: var(--space-4);
}

.checkbox-label input[type="checkbox"] {
    width: 18px;
    height: 18px;
    accent-color: var(--color-accent);
}

/* Prepínač (switch) pre aktívny/neaktívny stav odkazov */
.switch {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    font-size: var(--font-size-xs);
    color: var(--color-text-secondary);
    cursor: pointer;
}

.switch input[type="checkbox"] {
    appearance: none;
    width: 36px;
    height: 20px;
    border-radius: var(--radius-full);
    background: var(--color-border);
    position: relative;
    transition: background-color var(--transition-fast);
    flex-shrink: 0;
}

.switch input[type="checkbox"]::before {
    content: '';
    position: absolute;
    top: 2px;
    left: 2px;
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background: var(--color-text);
    transition: transform var(--transition-fast);
}

.switch input[type="checkbox"]:checked {
    background: var(--color-accent);
}

.switch input[type="checkbox"]:checked::before {
    transform: translateX(16px);
}

/* --- Stavové hlásenia --- */
.form-status {
    font-size: var(--font-size-xs);
    color: var(--color-text-secondary);
    min-height: 1.2em;
    margin-top: var(--space-2);
}

.field-error {
    color: var(--color-danger);
    font-size: var(--font-size-xs);
    margin-top: var(--space-2);
}

.empty-state {
    color: var(--color-text-muted);
    font-size: var(--font-size-sm);
    padding: var(--space-5) 0;
    text-align: center;
}

/* --- Utility --- */
.container {
    max-width: 1120px;
    margin: 0 auto;
    padding: 0 var(--space-5);
}

@media (max-width: 480px) {
    h1 { font-size: var(--font-size-2xl); }
    .container { padding: 0 var(--space-4); }
}
/* ==========================================================================
   Homepage — hero, demo, pricing, FAQ
   ========================================================================== */

.home-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    max-width: 1120px;
    margin: 0 auto;
    padding: var(--space-5) var(--space-5);
}

.home-logo {
    font-size: var(--font-size-lg);
    font-weight: 700;
    letter-spacing: -0.02em;
}

.home-nav {
    display: flex;
    align-items: center;
    gap: var(--space-5);
}

.home-nav > a:not(.btn-primary) {
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
}

.home-nav > a:not(.btn-primary):hover {
    color: var(--color-text);
}

/* --- Hero --- */
.hero {
    max-width: 720px;
    margin: 0 auto;
    padding: var(--space-7) var(--space-5) var(--space-8);
    text-align: center;
}

.hero h1 {
    font-size: var(--font-size-4xl);
    margin-bottom: var(--space-4);
}

.hero-subtitle {
    font-size: var(--font-size-lg);
    color: var(--color-text-secondary);
    max-width: 480px;
    margin: 0 auto var(--space-6);
}

.username-claim-form {
    display: flex;
    gap: var(--space-2);
    max-width: 420px;
    margin: 0 auto;
}

.username-claim-form .username-field {
    flex: 1;
}

.username-claim-form .btn-primary {
    flex-shrink: 0;
}

.phone-preview {
    margin-top: var(--space-8);
    display: flex;
    justify-content: center;
}

.phone-frame-static {
    width: 220px;
    height: 460px;
    border: 8px solid var(--color-surface-elevated);
    border-radius: 36px;
    background: var(--color-surface);
    box-shadow: var(--shadow-elevated);
    padding: var(--space-6) var(--space-4);
    display: flex;
    flex-direction: column;
    align-items: center;
}

.phone-preview-avatar {
    width: 56px;
    height: 56px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--color-accent), #7C3AED);
    margin-bottom: var(--space-3);
}

.phone-preview-name {
    font-size: var(--font-size-xs);
    color: var(--color-text-muted);
    margin-bottom: var(--space-5);
}

.phone-preview-link {
    width: 100%;
    height: 40px;
    border-radius: var(--radius-md);
    background: var(--color-surface-elevated);
    border: 1px solid var(--color-border);
    margin-bottom: var(--space-3);
}

/* --- Ako to funguje --- */
.demo-section {
    max-width: 1120px;
    margin: 0 auto;
    padding: var(--space-8) var(--space-5);
    text-align: center;
}

.demo-section h2 {
    margin-bottom: var(--space-6);
}

.demo-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--space-4);
    text-align: left;
}

.demo-card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--space-5);
}

.demo-card h3 {
    margin-bottom: var(--space-2);
}

.demo-card p {
    color: var(--color-text-secondary);
    font-size: var(--font-size-sm);
}

/* --- Výhody --- */
.benefits-section {
    max-width: 720px;
    margin: 0 auto;
    padding: var(--space-8) var(--space-5);
    text-align: center;
}

.benefits-section h2 {
    margin-bottom: var(--space-5);
}

.benefits-list {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-3);
    text-align: left;
}

.benefits-list li {
    padding: var(--space-3) var(--space-4);
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
}

/* --- Cenník --- */
.pricing-section {
    max-width: 800px;
    margin: 0 auto;
    padding: var(--space-8) var(--space-5);
    text-align: center;
}

.pricing-section h2 {
    margin-bottom: var(--space-6);
}

.pricing-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-5);
    text-align: left;
}

.pricing-card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--space-6);
}

.pricing-card--muted {
    opacity: 0.7;
}

.pricing-card h3 {
    margin-bottom: var(--space-2);
}

.pricing-card .price {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    margin-bottom: var(--space-4);
}

.pricing-card ul {
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
    margin-bottom: var(--space-5);
}

.pricing-card ul li {
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
    padding-left: var(--space-4);
    position: relative;
}

.pricing-card ul li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 8px;
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--color-accent);
}

.pricing-card .btn-primary,
.pricing-card .btn-secondary {
    width: 100%;
}

/* --- FAQ --- */
.faq-section {
    max-width: 640px;
    margin: 0 auto;
    padding: var(--space-8) var(--space-5);
}

.faq-section h2 {
    text-align: center;
    margin-bottom: var(--space-5);
}

.faq-section details {
    border-bottom: 1px solid var(--color-border);
    padding: var(--space-4) 0;
}

.faq-section summary {
    cursor: pointer;
    font-weight: 600;
    font-size: var(--font-size-sm);
    list-style: none;
}

.faq-section summary::-webkit-details-marker {
    display: none;
}

.faq-section summary::after {
    content: '+';
    float: right;
    color: var(--color-text-muted);
}

.faq-section details[open] summary::after {
    content: '–';
}

.faq-section details p {
    margin-top: var(--space-3);
    color: var(--color-text-secondary);
    font-size: var(--font-size-sm);
}

/* --- Pätička --- */
.home-footer {
    max-width: 1120px;
    margin: 0 auto;
    padding: var(--space-6) var(--space-5) var(--space-8);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-4);
    border-top: 1px solid var(--color-border);
    margin-top: var(--space-7);
}

.home-footer nav {
    display: flex;
    gap: var(--space-5);
    flex-wrap: wrap;
    justify-content: center;
}

.home-footer nav a {
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
}

.home-footer nav a:hover {
    color: var(--color-text);
}

.home-footer p {
    font-size: var(--font-size-xs);
    color: var(--color-text-muted);
}

/* --- Legal stránky (terms.php, privacy.php) --- */
.legal-page {
    padding: var(--space-6) var(--space-5) var(--space-8);
}

.legal-container {
    max-width: 640px;
    margin: 0 auto;
}

.legal-container h1 {
    margin: var(--space-5) 0 var(--space-2);
}

.legal-container h2 {
    font-size: var(--font-size-lg);
    margin-top: var(--space-6);
    margin-bottom: var(--space-2);
}

.legal-container p {
    color: var(--color-text-secondary);
    font-size: var(--font-size-sm);
    margin-bottom: var(--space-2);
}

/* --- Responzivita homepage --- */
@media (max-width: 768px) {
    .demo-grid {
        grid-template-columns: 1fr 1fr;
    }

    .benefits-list {
        grid-template-columns: 1fr;
    }

    .pricing-grid {
        grid-template-columns: 1fr;
    }

    .username-claim-form {
        flex-direction: column;
    }

    .hero h1 {
        font-size: var(--font-size-3xl);
    }
}

@media (max-width: 480px) {
    .demo-grid {
        grid-template-columns: 1fr;
    }

    .home-nav {
        gap: var(--space-3);
    }
}