/* ========================================
   BEAMX1 Demo v2 — Base Styles
   Reset, typography, shared components
   ======================================== */

/* === Reset === */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

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

body {
    font-family: var(--font-body);
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
    transition: background var(--duration) var(--ease), color var(--duration) var(--ease);
}

a {
    color: var(--beam);
    text-decoration: none;
    transition: color var(--duration) var(--ease);
}

a:hover {
    color: var(--beam-hover);
}

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

/* === Typography === */
h1, h2, h3, h4 {
    font-weight: 700;
    line-height: 1.2;
    color: var(--text-primary);
}

h1 { font-size: clamp(1.75rem, 4vw, 2.5rem); }
h2 { font-size: clamp(1.25rem, 3vw, 1.75rem); }
h3 { font-size: 1.125rem; }
h4 { font-size: 1rem; }

p {
    color: var(--text-secondary);
    line-height: 1.7;
}

code, .mono {
    font-family: var(--font-mono);
}

/* === Screens (SPA routing) === */
.screen {
    display: none;
    min-height: 100vh;
    animation: screenIn 0.4s var(--ease);
}

.screen.active {
    display: flex;
    flex-direction: column;
}

@keyframes screenIn {
    from { opacity: 0; transform: translateY(12px); }
    to { opacity: 1; transform: translateY(0); }
}

/* === Buttons === */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
    padding: 12px 24px;
    border-radius: var(--radius-md);
    font-family: var(--font-body);
    font-size: 0.9375rem;
    font-weight: 600;
    text-decoration: none;
    border: none;
    cursor: pointer;
    transition: all var(--duration) var(--ease);
    white-space: nowrap;
}

.btn:active {
    transform: scale(0.97);
}

.btn-primary {
    background: linear-gradient(135deg, var(--beam) 0%, var(--beam-hover) 100%);
    color: white;
    box-shadow: var(--shadow-glow);
}

.btn-primary:hover {
    transform: translateY(-1px);
    box-shadow: 0 0 50px var(--beam-glow);
}

.btn-secondary {
    background: var(--bg-card);
    color: var(--text-primary);
    border: 1px solid var(--border);
}

.btn-secondary:hover {
    border-color: var(--border-hover);
    background: var(--bg-card-hover);
}

.btn-ghost {
    background: transparent;
    color: var(--text-secondary);
    padding: 8px 16px;
}

.btn-ghost:hover {
    color: var(--text-primary);
    background: var(--bg-tertiary);
}

.btn-lg {
    padding: 16px 32px;
    font-size: 1rem;
    border-radius: var(--radius-lg);
}

.btn-sm {
    padding: 8px 16px;
    font-size: 0.8125rem;
}

.btn-icon {
    width: 40px;
    height: 40px;
    padding: 0;
    border-radius: var(--radius-sm);
}

.btn svg {
    width: 18px;
    height: 18px;
    flex-shrink: 0;
}

/* === Cards === */
.card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: var(--space-lg);
    transition: all var(--duration) var(--ease);
}

.card:hover {
    border-color: var(--border-hover);
    background: var(--bg-card-hover);
}

/* === Inputs === */
.input {
    width: 100%;
    padding: 12px 16px;
    background: var(--bg-input);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-family: var(--font-body);
    font-size: 1rem;
    transition: all var(--duration) var(--ease);
    outline: none;
}

.input:focus {
    border-color: var(--border-focus);
    box-shadow: 0 0 0 3px var(--beam-soft);
}

.input::placeholder {
    color: var(--text-muted);
}

/* === Tags / Badges === */
.tag {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 4px 12px;
    background: var(--bg-tertiary);
    border: 1px solid var(--border);
    border-radius: var(--radius-full);
    font-size: 0.75rem;
    font-weight: 500;
    color: var(--text-secondary);
}

.tag-beam {
    background: var(--beam-soft);
    border-color: rgba(16, 185, 129, 0.2);
    color: var(--beam);
}

/* === Top Bar (theme + lang) === */
.top-bar {
    position: fixed;
    top: 0;
    right: 0;
    z-index: 1000;
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-md);
}

.switch-group {
    display: flex;
    gap: 2px;
    background: var(--bg-tertiary);
    padding: 3px;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border);
}

.switch-btn {
    background: transparent;
    border: none;
    color: var(--text-muted);
    padding: 6px 12px;
    border-radius: 4px;
    cursor: pointer;
    font-family: var(--font-body);
    font-size: 0.8125rem;
    font-weight: 500;
    transition: all var(--duration) var(--ease);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    line-height: 1;
}

.switch-btn svg {
    width: 14px;
    height: 14px;
    display: block;
    flex-shrink: 0;
}

.switch-btn.active {
    background: var(--beam);
    color: white;
}

.switch-btn:hover:not(.active) {
    color: var(--text-primary);
    background: var(--bg-card);
}

.switch-sep {
    width: 1px;
    height: 16px;
    background: var(--border);
    margin: 0 2px;
    flex-shrink: 0;
}

/* Home + Logout button in top-bar — hidden by default, shown when logged in */
.top-bar-home,
.top-bar-logout {
    display: none;
}

body.logged-in .top-bar-home,
body.logged-in .top-bar-logout {
    display: inline-flex;
}

/* Hide top-bar during fullscreen scenario */
body.scenario-active .top-bar {
    display: none !important;
}

/* Sensor indicators — bottom left */
.sensor-indicators {
    position: fixed;
    bottom: 16px;
    left: 16px;
    display: flex;
    gap: 6px;
    z-index: 9999;
    pointer-events: none;
}

.sensor-ind {
    display: flex;
    align-items: center;
    gap: 4px;
    padding: 5px 8px;
    background: rgba(0, 0, 0, 0.6);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-full);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
}

.sensor-ind svg {
    color: var(--beam);
    width: 14px;
    height: 14px;
}

.sensor-ind-dot {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--success);
    animation: sensorPulse 1.5s infinite;
}

@keyframes sensorPulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.3; }
}

/* Permission buttons in intro */
.permission-buttons {
    display: flex;
    gap: 12px;
    justify-content: center;
    flex-wrap: wrap;
    margin: var(--space-lg) 0;
}

.permission-btn {
    min-width: 200px;
    transition: all var(--duration) var(--ease);
}

.permission-start-btn:disabled {
    opacity: 0.4;
    cursor: not-allowed;
}

.permission-start-btn:disabled:hover {
    transform: none;
    box-shadow: none;
}

/* === Language visibility === */
[data-lang="en"] { display: none; }
[data-active-lang="en"] [data-lang="en"] { display: block; }
[data-active-lang="en"] [data-lang="cs"] { display: none; }
span[data-lang="en"] { display: none; }
[data-active-lang="en"] span[data-lang="en"] { display: inline; }
[data-active-lang="en"] span[data-lang="cs"] { display: none; }

/* === Utility === */
.text-center { text-align: center; }
.text-muted { color: var(--text-muted); }
.text-beam { color: var(--beam); }
.mt-sm { margin-top: var(--space-sm); }
.mt-md { margin-top: var(--space-md); }
.mt-lg { margin-top: var(--space-lg); }
.mt-xl { margin-top: var(--space-xl); }
.mb-sm { margin-bottom: var(--space-sm); }
.mb-md { margin-bottom: var(--space-md); }
.mb-lg { margin-bottom: var(--space-lg); }
.gap-sm { gap: var(--space-sm); }
.gap-md { gap: var(--space-md); }

/* === Spinner === */
.spinner {
    width: 32px;
    height: 32px;
    border: 3px solid var(--border);
    border-top-color: var(--beam);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* === Footer === */
.app-footer {
    text-align: center;
    padding: var(--space-lg) var(--space-md);
    border-top: 1px solid var(--border);
    font-size: 0.8125rem;
    color: var(--text-muted);
}

.app-footer a {
    color: var(--text-secondary);
    transition: color var(--duration) var(--ease);
}

.app-footer a:hover {
    color: var(--beam);
}

/* === Responsive === */
@media (max-width: 768px) {
    .top-bar {
        padding: var(--space-sm);
        gap: 4px;
    }

    .switch-btn {
        padding: 5px 8px;
        font-size: 0.75rem;
    }

    .switch-btn svg {
        width: 12px;
        height: 12px;
    }

    .top-bar-logout span,
    .top-bar-admin span {
        display: none;
    }
}

@media (max-width: 480px) {
    .top-bar {
        padding: 6px 8px;
        gap: 3px;
    }

    .switch-group {
        padding: 2px;
    }

    .switch-btn {
        padding: 4px 6px;
        font-size: 0.6875rem;
    }

    .btn-sm {
        padding: 6px 8px;
        font-size: 0.75rem;
    }
}