/* ============================================================
   WebClicker — Mobile-First Styles
   ============================================================ */

:root {
    --color-bg: #0f0f1a;
    --color-surface: #1a1a2e;
    --color-surface-hover: #222240;
    --color-primary: #4361ee;
    --color-primary-hover: #3a56d4;
    --color-secondary: #2d2d4a;
    --color-secondary-hover: #3a3a5c;
    --color-accent: #7209b7;
    --color-danger: #ef233c;
    --color-danger-hover: #d90429;
    --color-success: #06d6a0;
    --color-warning: #ffd166;
    --color-text: #e8e8f0;
    --color-text-muted: #8888a0;
    --color-text-dim: #555570;
    --color-border: #2a2a45;
    --radius: 12px;
    --radius-sm: 8px;
    --shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
    --transition: 0.2s ease;
}

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

html {
    font-size: 16px;
    -webkit-tap-highlight-color: transparent;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background: var(--color-bg);
    color: var(--color-text);
    min-height: 100dvh;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
}

/* ---- Screens ---- */
.screen {
    display: none;
    min-height: 100dvh;
}

.screen.active {
    display: flex;
    align-items: center;
    justify-content: center;
}

#screen-controller.active {
    align-items: flex-start;
}

.screen-content {
    width: 100%;
    max-width: 440px;
    padding: 24px 16px;
    margin: 0 auto;
}

/* ---- Logo ---- */
.logo {
    text-align: center;
    margin-bottom: 32px;
}

.logo-icon {
    font-size: 48px;
    color: var(--color-primary);
    margin-bottom: 8px;
}

.logo h1 {
    font-size: 2rem;
    font-weight: 700;
    letter-spacing: -0.02em;
}

.subtitle {
    color: var(--color-text-muted);
    font-size: 0.95rem;
    margin-top: 4px;
}

/* ---- Card ---- */
.card {
    background: var(--color-surface);
    border-radius: var(--radius);
    padding: 24px;
    box-shadow: var(--shadow);
}

/* ---- Buttons ---- */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    border: none;
    border-radius: var(--radius-sm);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: background var(--transition), transform var(--transition);
    -webkit-user-select: none;
    user-select: none;
    touch-action: manipulation;
}

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

.btn-primary {
    background: var(--color-primary);
    color: #fff;
    width: 100%;
    padding: 16px;
    font-size: 1.1rem;
}

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

.btn-secondary {
    background: var(--color-primary);
    color: #fff;
    padding: 12px 20px;
    flex-shrink: 0;
}

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

.btn-danger {
    background: var(--color-danger);
    color: #fff;
    padding: 10px 20px;
}

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

.btn-small {
    font-size: 0.85rem;
    padding: 8px 16px;
}

.btn-large {
    padding: 18px;
    font-size: 1.15rem;
}

.btn-icon {
    font-size: 1.3em;
    line-height: 1;
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
}

/* ---- Divider ---- */
.divider {
    display: flex;
    align-items: center;
    margin: 20px 0;
    color: var(--color-text-dim);
    font-size: 0.85rem;
}

.divider::before,
.divider::after {
    content: '';
    flex: 1;
    height: 1px;
    background: var(--color-border);
}

.divider span {
    padding: 0 12px;
}

/* ---- Input Group ---- */
.input-group {
    display: flex;
    gap: 8px;
}

.input-group input {
    flex: 1;
    background: var(--color-bg);
    border: 2px solid var(--color-border);
    border-radius: var(--radius-sm);
    color: var(--color-text);
    font-size: 1rem;
    padding: 12px 16px;
    outline: none;
    transition: border-color var(--transition);
    font-family: 'Courier New', monospace;
    letter-spacing: 0.05em;
}

.input-group input:focus {
    border-color: var(--color-primary);
}

.input-group input::placeholder {
    color: var(--color-text-dim);
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    letter-spacing: normal;
}

/* ---- Error Message ---- */
.error-message {
    background: rgba(239, 35, 60, 0.15);
    border: 1px solid var(--color-danger);
    border-radius: var(--radius-sm);
    color: var(--color-danger);
    padding: 12px 16px;
    margin-top: 16px;
    font-size: 0.9rem;
    text-align: center;
}

/* ---- Session Header ---- */
.session-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: var(--color-surface);
    border-radius: var(--radius);
    padding: 16px;
    margin-bottom: 12px;
}

.session-passphrase .label {
    display: block;
    font-size: 0.75rem;
    color: var(--color-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.08em;
    margin-bottom: 2px;
}

.passphrase-text {
    font-family: 'Courier New', monospace;
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--color-primary);
    letter-spacing: 0.03em;
}

.session-status {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.85rem;
    color: var(--color-text-muted);
}

.indicator {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    display: inline-block;
}

.indicator.connected {
    background: var(--color-success);
    box-shadow: 0 0 8px rgba(6, 214, 160, 0.5);
}

.indicator.disconnected {
    background: var(--color-danger);
}

/* ---- Computers Panel ---- */
.computers-panel {
    background: var(--color-surface);
    border-radius: var(--radius);
    margin-bottom: 12px;
    overflow: hidden;
}

.panel-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 16px;
    cursor: pointer;
    font-size: 0.85rem;
    color: var(--color-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.06em;
    -webkit-user-select: none;
    user-select: none;
}

.toggle-arrow {
    font-size: 0.7rem;
    transition: transform var(--transition);
}

.toggle-arrow.open {
    transform: rotate(180deg);
}

.computers-list {
    padding: 0 16px 12px;
}

.computers-list.hidden {
    display: none;
}

.computer-item {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 0;
    font-size: 0.9rem;
    border-bottom: 1px solid var(--color-border);
}

.computer-item:last-child {
    border-bottom: none;
}

.computer-item .indicator {
    width: 8px;
    height: 8px;
}

.empty-state {
    color: var(--color-text-dim);
    font-size: 0.85rem;
    font-style: italic;
    padding: 4px 0;
}

/* ---- Mode Toggle ---- */
.mode-toggle {
    display: flex;
    background: var(--color-surface);
    border-radius: var(--radius-sm);
    padding: 4px;
    margin-bottom: 12px;
}

.mode-btn {
    flex: 1;
    background: transparent;
    border: none;
    border-radius: 6px;
    color: var(--color-text-muted);
    font-size: 0.9rem;
    font-weight: 600;
    padding: 10px;
    cursor: pointer;
    transition: all var(--transition);
    -webkit-user-select: none;
    user-select: none;
}

.mode-btn.active {
    background: var(--color-primary);
    color: #fff;
}

/* ---- Target Selector ---- */
.target-selector {
    margin-bottom: 12px;
}

.target-selector.hidden {
    display: none;
}

.target-selector select {
    width: 100%;
    background: var(--color-surface);
    border: 2px solid var(--color-border);
    border-radius: var(--radius-sm);
    color: var(--color-text);
    font-size: 0.95rem;
    padding: 12px 16px;
    outline: none;
    cursor: pointer;
    -webkit-appearance: none;
    appearance: none;
}

.target-selector select:focus {
    border-color: var(--color-primary);
}

/* ---- Control Buttons ---- */
.controls-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
    margin-bottom: 12px;
}

.controls-secondary {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr;
    gap: 12px;
    margin-bottom: 24px;
}

.ctrl-btn {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 8px;
    background: var(--color-surface);
    border: 2px solid var(--color-border);
    border-radius: var(--radius);
    color: var(--color-text);
    padding: 24px 16px;
    cursor: pointer;
    transition: all var(--transition);
    -webkit-user-select: none;
    user-select: none;
    touch-action: manipulation;
}

.ctrl-btn:active {
    transform: scale(0.95);
}

.ctrl-icon {
    font-size: 1.8rem;
    line-height: 1;
}

.ctrl-label {
    font-size: 0.8rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--color-text-muted);
}

/* Specific button colors */
.ctrl-prev {
    border-color: var(--color-secondary);
}
.ctrl-prev:active {
    background: var(--color-secondary-hover);
    border-color: var(--color-primary);
}

.ctrl-next {
    border-color: var(--color-primary);
    background: rgba(67, 97, 238, 0.1);
}
.ctrl-next:active {
    background: rgba(67, 97, 238, 0.25);
}

.ctrl-start {
    border-color: rgba(6, 214, 160, 0.3);
}
.ctrl-start:active {
    background: rgba(6, 214, 160, 0.15);
    border-color: var(--color-success);
}

.ctrl-black {
    border-color: var(--color-border);
}
.ctrl-black:active {
    background: #000;
    border-color: var(--color-text-dim);
}

.ctrl-end {
    border-color: rgba(239, 35, 60, 0.3);
}
.ctrl-end:active {
    background: rgba(239, 35, 60, 0.15);
    border-color: var(--color-danger);
}

/* ---- Feedback flash on button press ---- */
.ctrl-btn.flash {
    animation: btnFlash 0.3s ease;
}

@keyframes btnFlash {
    0%   { filter: brightness(1); }
    50%  { filter: brightness(1.5); }
    100% { filter: brightness(1); }
}

/* ---- Footer ---- */
.footer-actions {
    text-align: center;
}

/* ---- Utility ---- */
.hidden {
    display: none !important;
}

/* Desktop/Mobile visibility */
.desktop-only {
    display: block;
}

.mobile-only {
    display: none;
}

@media (max-width: 768px) {
    .desktop-only {
        display: none;
    }
    
    .mobile-only {
        display: block;
    }
    
    .mobile-only.hidden {
        display: none;
    }
}

/* ---- Loading spinner ---- */
.spinner {
    display: inline-block;
    width: 18px;
    height: 18px;
    border: 2px solid rgba(255,255,255,0.3);
    border-top-color: #fff;
    border-radius: 50%;
    animation: spin 0.6s linear infinite;
}

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

/* ---- Responsive: larger screens ---- */
@media (min-width: 500px) {
    .screen-content {
        padding: 32px 24px;
    }

    .ctrl-btn {
        padding: 32px 20px;
    }

    .ctrl-icon {
        font-size: 2.2rem;
    }
}

/* ---- PWA install banner ---- */
.install-banner {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: var(--color-surface);
    border-top: 1px solid var(--color-border);
    padding: 12px 16px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    z-index: 100;
    transform: translateY(100%);
    transition: transform 0.3s ease;
}

.install-banner.visible {
    transform: translateY(0);
}

.install-banner-text {
    font-size: 0.9rem;
    color: var(--color-text);
}

.install-banner .btn {
    flex-shrink: 0;
}

.install-dismiss {
    background: transparent;
    border: none;
    color: var(--color-text-dim);
    font-size: 1.2rem;
    cursor: pointer;
    padding: 4px 8px;
}