/* ============================================
   Android Control Panel — Global Stylesheet
   Material Design 3 / Paper Layer Aesthetic
   ============================================ */

/* ---------- Google Fonts ---------- */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&display=swap');
@import url('https://fonts.googleapis.com/icon?family=Material+Icons+Round');

/* ---------- CSS Custom Properties ---------- */
:root {
    /* Primary palette */
    --md-primary: #1a73e8;
    --md-primary-hover: #1565c0;
    --md-primary-light: #e8f0fe;
    --md-primary-container: #d3e3fd;
    --md-on-primary: #ffffff;
    --md-on-primary-container: #041e49;

    /* Surface / Paper layers */
    --md-surface: #ffffff;
    --md-surface-dim: #f8f9fa;
    --md-surface-container: #f1f3f4;
    --md-surface-container-high: #e8eaed;
    --md-surface-container-highest: #dadce0;
    --md-on-surface: #1f1f1f;
    --md-on-surface-variant: #5f6368;

    /* Status colors */
    --md-success: #0f9d58;
    --md-success-container: #ceead6;
    --md-error: #d93025;
    --md-error-container: #fce8e6;
    --md-warning: #f9ab00;
    --md-warning-container: #fef7e0;
    --md-info: #1a73e8;
    --md-info-container: #e8f0fe;

    /* Elevation / shadows (paper layers) */
    --md-elevation-1: 0 1px 2px rgba(0, 0, 0, 0.06), 0 1px 3px rgba(0, 0, 0, 0.1);
    --md-elevation-2: 0 1px 3px rgba(0, 0, 0, 0.08), 0 4px 8px rgba(0, 0, 0, 0.1);
    --md-elevation-3: 0 2px 6px rgba(0, 0, 0, 0.1), 0 8px 16px rgba(0, 0, 0, 0.1);
    --md-elevation-4: 0 4px 8px rgba(0, 0, 0, 0.1), 0 12px 24px rgba(0, 0, 0, 0.12);
    --md-elevation-5: 0 6px 12px rgba(0, 0, 0, 0.1), 0 16px 32px rgba(0, 0, 0, 0.14);

    /* Shape */
    --md-radius-sm: 8px;
    --md-radius-md: 12px;
    --md-radius-lg: 16px;
    --md-radius-xl: 28px;

    /* Spacing */
    --md-spacing-xs: 4px;
    --md-spacing-sm: 8px;
    --md-spacing-md: 16px;
    --md-spacing-lg: 24px;
    --md-spacing-xl: 32px;
    --md-spacing-2xl: 48px;

    /* Typography */
    --md-font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --md-font-mono: 'SF Mono', 'Fira Code', 'Cascadia Code', 'Consolas', monospace;
}

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

html {
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--md-font-family);
    background: var(--md-surface-dim);
    color: var(--md-on-surface);
    line-height: 1.6;
    min-height: 100vh;
}

/* ---------- App Shell ---------- */
.app-shell {
    max-width: 1200px;
    margin: 0 auto;
    padding: var(--md-spacing-md);
}

/* ---------- Top Bar ---------- */
.top-bar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--md-spacing-md) var(--md-spacing-lg);
    background: var(--md-surface);
    border-radius: var(--md-radius-lg);
    box-shadow: var(--md-elevation-1);
    margin-bottom: var(--md-spacing-lg);
    gap: var(--md-spacing-md);
    flex-wrap: wrap;
}

.top-bar-title {
    display: flex;
    align-items: center;
    gap: var(--md-spacing-sm);
}

.top-bar-title .material-icons-round {
    font-size: 28px;
    color: var(--md-primary);
}

.top-bar-title h1 {
    font-size: 1.25rem;
    font-weight: 600;
    letter-spacing: -0.01em;
    color: var(--md-on-surface);
}

.top-bar-actions {
    display: flex;
    align-items: center;
    gap: var(--md-spacing-sm);
}

/* ---------- Buttons ---------- */
.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--md-spacing-sm);
    padding: 10px 20px;
    font-family: var(--md-font-family);
    font-size: 0.875rem;
    font-weight: 500;
    letter-spacing: 0.01em;
    border-radius: var(--md-radius-xl);
    border: none;
    cursor: pointer;
    transition: all 0.2s cubic-bezier(0.2, 0, 0, 1);
    user-select: none;
    white-space: nowrap;
    position: relative;
    overflow: hidden;
}

.btn::after {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: inherit;
    background: currentColor;
    opacity: 0;
    transition: opacity 0.2s;
}

.btn:hover::after {
    opacity: 0.08;
}

.btn:active::after {
    opacity: 0.12;
}

.btn:disabled {
    opacity: 0.38;
    cursor: not-allowed;
}

.btn:disabled::after {
    display: none;
}

.btn-filled {
    background: var(--md-primary);
    color: var(--md-on-primary);
    box-shadow: var(--md-elevation-1);
}

.btn-filled:hover {
    box-shadow: var(--md-elevation-2);
}

.btn-filled:active {
    box-shadow: var(--md-elevation-1);
}

.btn-outlined {
    background: transparent;
    color: var(--md-primary);
    border: 1px solid var(--md-surface-container-highest);
}

.btn-tonal {
    background: var(--md-primary-container);
    color: var(--md-on-primary-container);
}

.btn-text {
    background: transparent;
    color: var(--md-primary);
    padding: 10px 12px;
}

.btn .material-icons-round {
    font-size: 18px;
}

/* ---------- Status Badge ---------- */
.status-badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 6px 14px;
    border-radius: var(--md-radius-xl);
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.04em;
}

.status-badge::before {
    content: '';
    width: 8px;
    height: 8px;
    border-radius: 50%;
}

.status-disconnected {
    background: var(--md-error-container);
    color: var(--md-error);
}

.status-disconnected::before {
    background: var(--md-error);
}

.status-connected {
    background: var(--md-success-container);
    color: var(--md-success);
}

.status-connected::before {
    background: var(--md-success);
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.4; }
}

/* ---------- Section Header ---------- */
.section-header {
    margin-bottom: var(--md-spacing-md);
}

.section-header h2 {
    font-size: 1rem;
    font-weight: 500;
    color: var(--md-on-surface-variant);
    letter-spacing: 0.02em;
}

/* ---------- Card Grid ---------- */
.card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
    gap: var(--md-spacing-md);
    margin-bottom: var(--md-spacing-xl);
}

/* ---------- Feature Card (Home Page Tile) ---------- */
.feature-card {
    background: var(--md-surface);
    border-radius: var(--md-radius-lg);
    padding: var(--md-spacing-lg);
    box-shadow: var(--md-elevation-1);
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.2, 0, 0, 1);
    text-decoration: none;
    color: inherit;
    display: flex;
    flex-direction: column;
    gap: var(--md-spacing-sm);
    position: relative;
    overflow: hidden;
    border: 1px solid transparent;
}

.feature-card::before {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: inherit;
    background: var(--md-primary);
    opacity: 0;
    transition: opacity 0.3s;
    pointer-events: none;
}

.feature-card:hover {
    box-shadow: var(--md-elevation-3);
    transform: translateY(-2px);
    border-color: var(--md-primary-container);
}

.feature-card:hover::before {
    opacity: 0.04;
}

.feature-card:active {
    transform: translateY(0);
    box-shadow: var(--md-elevation-2);
}

.feature-card:active::before {
    opacity: 0.08;
}

.feature-card-icon {
    width: 48px;
    height: 48px;
    border-radius: var(--md-radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--md-primary-light);
    color: var(--md-primary);
    margin-bottom: var(--md-spacing-xs);
    transition: background 0.3s, transform 0.3s;
}

.feature-card:hover .feature-card-icon {
    background: var(--md-primary-container);
    transform: scale(1.05);
}

.feature-card-icon .material-icons-round {
    font-size: 24px;
}

.feature-card-title {
    font-size: 0.9375rem;
    font-weight: 600;
    color: var(--md-on-surface);
    line-height: 1.3;
}

.feature-card-description {
    font-size: 0.8125rem;
    color: var(--md-on-surface-variant);
    line-height: 1.5;
}

.feature-card-badge {
    position: absolute;
    top: var(--md-spacing-md);
    right: var(--md-spacing-md);
    padding: 2px 8px;
    border-radius: var(--md-radius-sm);
    font-size: 0.6875rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.04em;
}

.badge-coming-soon {
    background: var(--md-surface-container);
    color: var(--md-on-surface-variant);
}

/* ---------- Feature Page Layout ---------- */
.page-header {
    display: flex;
    align-items: center;
    gap: var(--md-spacing-md);
    padding: var(--md-spacing-md) var(--md-spacing-lg);
    background: var(--md-surface);
    border-radius: var(--md-radius-lg);
    box-shadow: var(--md-elevation-1);
    margin-bottom: var(--md-spacing-lg);
}

.page-header .btn-back {
    background: transparent;
    border: none;
    cursor: pointer;
    padding: var(--md-spacing-sm);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background 0.2s;
    color: var(--md-on-surface);
}

.page-header .btn-back:hover {
    background: var(--md-surface-container);
}

.page-header-content h1 {
    font-size: 1.125rem;
    font-weight: 600;
}

.page-header-content p {
    font-size: 0.8125rem;
    color: var(--md-on-surface-variant);
    margin-top: 2px;
}

/* ---------- Action Card (Feature Sub-item) ---------- */
.action-card {
    background: var(--md-surface);
    border-radius: var(--md-radius-lg);
    padding: var(--md-spacing-lg);
    box-shadow: var(--md-elevation-1);
    margin-bottom: var(--md-spacing-md);
    transition: all 0.3s cubic-bezier(0.2, 0, 0, 1);
    border: 1px solid transparent;
}

.action-card:hover {
    box-shadow: var(--md-elevation-2);
    border-color: var(--md-surface-container-highest);
}

.action-card-header {
    display: flex;
    align-items: center;
    gap: var(--md-spacing-md);
    margin-bottom: var(--md-spacing-md);
}

.action-card-icon {
    width: 40px;
    height: 40px;
    border-radius: var(--md-radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.action-card-icon .material-icons-round {
    font-size: 22px;
    color: var(--md-on-primary);
}

.action-card-title {
    font-size: 0.9375rem;
    font-weight: 600;
    color: var(--md-on-surface);
}

.action-card-description {
    font-size: 0.8125rem;
    color: var(--md-on-surface-variant);
    line-height: 1.6;
    margin-bottom: var(--md-spacing-md);
}

.action-card-actions {
    display: flex;
    justify-content: flex-end;
    gap: var(--md-spacing-sm);
}

/* ---------- Step Card System (Wizard) ---------- */
.step-card {
    background: var(--md-surface);
    border-radius: var(--md-radius-lg);
    box-shadow: var(--md-elevation-2);
    margin-bottom: var(--md-spacing-md);
    overflow: hidden;
    border-left: 4px solid var(--md-primary);
    animation: slideIn 0.4s cubic-bezier(0.2, 0, 0, 1);
}

.step-card.hidden-step {
    display: none;
}

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

.step-card-header {
    background: var(--md-surface-dim);
    padding: var(--md-spacing-md) var(--md-spacing-lg);
    border-bottom: 1px solid var(--md-surface-container);
    display: flex;
    align-items: center;
    gap: var(--md-spacing-sm);
}

.step-card-header .step-icon {
    font-size: 22px;
    color: var(--md-primary);
}

.step-card-header .step-title {
    font-size: 0.9375rem;
    font-weight: 500;
}

.step-card-body {
    padding: var(--md-spacing-lg);
    display: flex;
    flex-direction: column;
}

.step-card-body .step-description {
    font-size: 0.875rem;
    color: var(--md-on-surface-variant);
    line-height: 1.7;
    margin-bottom: var(--md-spacing-md);
}

.step-card-body .step-description strong {
    color: var(--md-on-surface);
    font-weight: 600;
}

.step-card-actions {
    display: flex;
    justify-content: flex-end;
    gap: var(--md-spacing-sm);
}

/* ---------- Terminal Log ---------- */
.log-card {
    background: var(--md-surface);
    border-radius: var(--md-radius-lg);
    box-shadow: var(--md-elevation-1);
    overflow: hidden;
    margin-top: var(--md-spacing-lg);
}

.log-header {
    background: var(--md-surface-container);
    padding: var(--md-spacing-md) var(--md-spacing-lg);
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid var(--md-surface-container-high);
}

.log-header h3 {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--md-on-surface);
    display: flex;
    align-items: center;
    gap: var(--md-spacing-sm);
}

.log-body {
    padding: var(--md-spacing-md);
}

#terminal-log {
    font-family: var(--md-font-mono);
    font-size: 0.8125rem;
    line-height: 1.7;
    white-space: pre-wrap;
    word-break: break-all;
    max-height: 280px;
    overflow-y: auto;
    color: var(--md-on-surface);
    margin: 0;
}

#terminal-log .log-info { color: var(--md-on-surface); }
#terminal-log .log-system { color: var(--md-primary); }
#terminal-log .log-warn { color: var(--md-warning); }
#terminal-log .log-error { color: var(--md-error); }
#terminal-log .log-success { color: var(--md-success); }

/* ---------- Alert Banners ---------- */
.alert {
    padding: var(--md-spacing-md);
    border-radius: var(--md-radius-md);
    font-size: 0.8125rem;
    line-height: 1.6;
    margin-bottom: var(--md-spacing-md);
}

.alert-success {
    background: var(--md-success-container);
    color: #0d652d;
}

.alert-error {
    background: var(--md-error-container);
    color: #8b1a10;
}

.alert-warning {
    background: var(--md-warning-container);
    color: #795600;
}

.alert-info {
    background: var(--md-info-container);
    color: var(--md-on-primary-container);
}

.alert strong {
    font-weight: 600;
}

/* ---------- Loader / Spinner ---------- */
.loader {
    display: flex;
    align-items: center;
    gap: var(--md-spacing-sm);
    font-size: 0.875rem;
    color: var(--md-on-surface-variant);
    padding: var(--md-spacing-md) 0;
}

.loader::before {
    content: '';
    width: 20px;
    height: 20px;
    border: 2px solid var(--md-surface-container-highest);
    border-top-color: var(--md-primary);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

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

/* ---------- Responsive ---------- */
@media (max-width: 600px) {
    .app-shell {
        padding: var(--md-spacing-sm);
    }

    .top-bar {
        padding: var(--md-spacing-sm) var(--md-spacing-md);
    }

    .top-bar-title h1 {
        font-size: 1.1rem;
    }

    .card-grid {
        grid-template-columns: 1fr 1fr;
        gap: var(--md-spacing-sm);
    }

    .feature-card {
        padding: var(--md-spacing-md);
    }

    .feature-card-icon {
        width: 40px;
        height: 40px;
    }

    .feature-card-icon .material-icons-round {
        font-size: 20px;
    }

    .page-header {
        padding: var(--md-spacing-sm) var(--md-spacing-md);
    }
}

@media (max-width: 400px) {
    .card-grid {
        grid-template-columns: 1fr;
    }
}
/* ---------- SPA View Transitions ---------- */
.view {
    animation: fadeIn 0.3s cubic-bezier(0.2, 0, 0, 1);
}

.hidden-view {
    display: none;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(8px); }
    to { opacity: 1; transform: translateY(0); }
}

/* ---------- Disabled State Overrides ---------- */
.btn:disabled, .requires-connection:disabled {
    opacity: 0.38 !important;
    cursor: not-allowed !important;
    pointer-events: none;
    filter: grayscale(1);
}

.feature-card.disabled {
    opacity: 0.5;
    cursor: default;
    pointer-events: none;
}

/* ---------- Modal UI (Connection Wizard) ---------- */
.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s cubic-bezier(0.2, 0, 0, 1);
    backdrop-filter: blur(4px);
}

.modal-overlay.active {
    opacity: 1;
    visibility: visible;
}

.modal-card {
    background: var(--md-surface);
    width: 100%;
    max-width: 440px;
    border-radius: var(--md-radius-xl);
    box-shadow: var(--md-elevation-5);
    padding: var(--md-spacing-lg);
    display: flex;
    flex-direction: column;
    gap: var(--md-spacing-lg);
    transform: scale(0.9) translateY(20px);
    transition: all 0.3s cubic-bezier(0.2, 0, 0, 1);
}

.modal-overlay.active .modal-card {
    transform: scale(1) translateY(0);
}

.modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.modal-header h2 {
    font-size: 1.25rem;
    font-weight: 500;
}

.btn-icon {
    background: transparent;
    border: none;
    cursor: pointer;
    border-radius: 50%;
    padding: 8px;
    display: flex;
    transition: background 0.2s;
}

.btn-icon:hover { background: var(--md-surface-container); }

.onboarding-step {
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--md-spacing-md);
    animation: slideIn 0.3s cubic-bezier(0.2, 0, 0, 1);
}

.onboarding-icon {
    width: 64px;
    height: 64px;
    background: var(--md-primary-light);
    color: var(--md-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.onboarding-icon .material-icons-round { font-size: 32px; }

.onboarding-step h3 { font-size: 1.125rem; font-weight: 600; }
.onboarding-step p { font-size: 0.875rem; color: var(--md-on-surface-variant); max-width: 300px; }

.modal-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.step-dots {
    display: flex;
    gap: 8px;
}

.dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--md-surface-container-highest);
    transition: background 0.3s;
}

.dot.active { background: var(--md-primary); }

.hidden-step { display: none; }

/* ---------- UI Speed Tweaker Specific Styles ---------- */
.badge-value {
    background: var(--md-primary-container);
    color: var(--md-on-primary-container);
    padding: 2px 8px;
    border-radius: var(--md-radius-sm);
    font-size: 0.75rem;
    font-weight: 600;
}

.md-slider {
    -webkit-appearance: none;
    appearance: none;
    width: 100%;
    height: 4px;
    background: var(--md-surface-container-highest);
    border-radius: 2px;
    outline: none;
    margin: var(--md-spacing-md) 0 var(--md-spacing-xs);
    cursor: pointer;
}

.md-slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 20px;
    height: 20px;
    background: var(--md-primary);
    border-radius: 50%;
    cursor: pointer;
    transition: transform 0.2s;
}

.md-slider:hover::-webkit-slider-thumb {
    transform: scale(1.2);
}

.slider-labels {
    display: flex;
    justify-content: space-between;
    font-size: 0.75rem;
    color: var(--md-on-surface-variant);
}

.md-input {
    background: var(--md-surface);
    border: 1px solid var(--md-surface-container-highest);
    border-radius: var(--md-radius-sm);
    padding: 10px 16px;
    font-family: var(--md-font-family);
    font-size: 0.9375rem;
    color: var(--md-on-surface);
    width: 120px;
    outline: none;
    transition: border-color 0.2s;
}

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

.preset-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(80px, 1fr));
    gap: var(--md-spacing-sm);
    margin-top: var(--md-spacing-sm);
}

.preset-dpi {
    justify-content: center;
    padding: 8px;
}