/* ========================================
   CSS Custom Properties (Design Tokens)
   ======================================== */
:root {
    /* Colors */
    --color-primary: #3b82f6;
    --color-primary-dark: #2563eb;
    --color-success: #10b981;
    --color-warning: #f59e0b;
    --color-danger: #ef4444;

    --color-bg: #f5f5f5;
    --color-surface: #ffffff;
    --color-surface-dark: #2d3748;

    --color-text-primary: #1f2937;
    --color-text-secondary: #6b7280;
    --color-text-muted: #9ca3af;

    --color-border: #e5e7eb;
    --color-border-light: #f3f4f6;

    /* Modal Colors */
    --color-modal-bg: #f9f7ed;
    --color-modal-text: #2d2d2d;
    --color-rating-bg: #2d3748;
    --color-rating-active: #3b82f6;
    --color-help-icon: #e8e5d5;
    --color-help-text: #9b8b6f;

    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
    --shadow-modal: 0 -4px 24px rgba(0, 0, 0, 0.15);

    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;

    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-full: 9999px;

    /* Typography */
    --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;

    /* Touch Targets */
    --touch-target: 44px;

    /* Transitions */
    --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-base: 250ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 350ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-spring: 400ms cubic-bezier(0.34, 1.56, 0.64, 1);

    /* Z-index */
    --z-modal-backdrop: 1000;
    --z-modal: 1001;
    --z-fab: 1002;
}

/* ========================================
   Base Styles & Reset
   ======================================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    -webkit-tap-highlight-color: transparent;
}

body {
    font-family: var(--font-sans);
    font-size: var(--font-size-base);
    line-height: 1.5;
    color: var(--color-text-primary);
    background-color: var(--color-bg);
    overflow-x: hidden;
    min-height: 100vh;
    min-height: -webkit-fill-available;
}

body.modal-open {
    overflow: hidden;
    position: fixed;
    width: 100%;
}

body.modal-minimized {
    padding-bottom: 20px;
}

button {
    font-family: inherit;
    cursor: pointer;
    border: none;
    background: none;
    -webkit-tap-highlight-color: transparent;
}

input, textarea {
    font-family: inherit;
}

/* ========================================
   App Container & Layout
   ======================================== */
.app-container {
    min-height: 100vh;
    min-height: -webkit-fill-available;
    display: flex;
    flex-direction: column;
    background-color: var(--color-bg);
    padding-bottom: 72px; /* Space for bottom nav */
}

/* ========================================
   Header
   ======================================== */
.app-header {
    background-color: var(--color-surface);
    border-bottom: 1px solid var(--color-border-light);
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: var(--shadow-sm);
}

.header-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-md);
    max-width: 100%;
}

.header-title {
    font-size: var(--font-size-base);
    font-weight: 500;
    color: var(--color-text-primary);
    flex: 1;
    text-align: center;
}

.icon-btn {
    width: var(--touch-target);
    height: var(--touch-target);
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-md);
    color: var(--color-text-secondary);
    transition: background-color var(--transition-fast);
}

.icon-btn:active {
    background-color: var(--color-border-light);
}

/* ========================================
   Search Bar
   ======================================== */
.search-container {
    display: flex;
    gap: var(--spacing-sm);
    padding: var(--spacing-md);
    background-color: var(--color-surface);
    border-bottom: 1px solid var(--color-border-light);
}

.search-box {
    flex: 1;
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    background-color: var(--color-bg);
    border-radius: var(--radius-lg);
    padding: var(--spacing-sm) var(--spacing-md);
    border: 1px solid var(--color-border);
}

.search-icon {
    color: var(--color-text-muted);
    flex-shrink: 0;
}

.search-input {
    flex: 1;
    border: none;
    background: none;
    outline: none;
    font-size: var(--font-size-base);
    color: var(--color-text-primary);
}

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

.user-btn {
    width: var(--touch-target);
    height: var(--touch-target);
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: var(--color-bg);
    border-radius: var(--radius-full);
    border: 1px solid var(--color-border);
    color: var(--color-text-secondary);
    transition: all var(--transition-fast);
}

.user-btn:active {
    background-color: var(--color-border);
    transform: scale(0.95);
}

/* ========================================
   Main Content
   ======================================== */
.main-content {
    flex: 1;
    padding: var(--spacing-lg) var(--spacing-md);
    overflow-y: auto;
}

.content-section {
    margin-bottom: var(--spacing-xl);
}

.section-title {
    font-size: var(--font-size-xl);
    font-weight: 600;
    color: var(--color-text-primary);
    margin-bottom: var(--spacing-lg);
}

/* ========================================
   Domain Cards
   ======================================== */
.domain-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.domain-card {
    background-color: var(--color-surface);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--color-border-light);
    transition: all var(--transition-fast);
}

.domain-card:active {
    transform: scale(0.98);
    box-shadow: var(--shadow-md);
}

.domain-info {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--spacing-sm);
}

.domain-name {
    font-size: var(--font-size-lg);
    font-weight: 500;
    color: var(--color-text-primary);
}

.domain-status {
    font-size: var(--font-size-xs);
    font-weight: 500;
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-full);
    text-transform: uppercase;
    letter-spacing: 0.025em;
}

.domain-status.active {
    background-color: #d1fae5;
    color: #065f46;
}

.domain-status.warning {
    background-color: #fef3c7;
    color: #92400e;
}

.domain-meta {
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
}

/* ========================================
   Bottom Navigation
   ======================================== */
.bottom-nav {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    display: flex;
    background-color: var(--color-surface-dark);
    padding: var(--spacing-sm) 0;
    box-shadow: 0 -2px 10px rgba(0, 0, 0, 0.1);
    z-index: 99;
    padding-bottom: env(safe-area-inset-bottom, var(--spacing-sm));
    transition: transform var(--transition-base);
}

body.modal-minimized .bottom-nav {
    transform: translateY(-20px);
}

.nav-item {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-sm);
    color: #9ca3af;
    text-decoration: none;
    position: relative;
    transition: color var(--transition-fast);
}

.nav-item.active {
    color: #10b981;
}

.nav-item svg {
    width: 24px;
    height: 24px;
}

.nav-item span {
    font-size: var(--font-size-xs);
    font-weight: 500;
}

.nav-item .badge {
    position: absolute;
    top: 4px;
    right: 20%;
    background-color: #4b5563;
    color: white;
    font-size: 10px;
    padding: 2px 6px;
    border-radius: var(--radius-full);
    min-width: 18px;
    text-align: center;
}

/* ========================================
   Modal Backdrop
   ======================================== */
.modal-backdrop {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(0, 0, 0, 0.5);
    z-index: var(--z-modal-backdrop);
    opacity: 0;
    visibility: hidden;
    transition: opacity var(--transition-base), visibility var(--transition-base);
    -webkit-backdrop-filter: blur(2px);
    backdrop-filter: blur(2px);
}

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

/* ========================================
   Satisfaction Survey Modal
   ======================================== */
.satisfaction-modal {
    position: fixed;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: var(--color-modal-bg);
    border-radius: var(--radius-xl) var(--radius-xl) 0 0;
    box-shadow: var(--shadow-modal);
    z-index: var(--z-modal);
    max-height: 90vh;
    transform: translateY(100%);
    transition: transform var(--transition-spring);
    will-change: transform;
    touch-action: none;
    display: flex;
    flex-direction: column;
}

.satisfaction-modal.active {
    transform: translateY(50%);
}

.satisfaction-modal.expanded {
    transform: translateY(0);
}

.satisfaction-modal.minimized {
    transform: translateY(calc(100% - 16px));
    transition: transform var(--transition-base);
}

.satisfaction-modal.dismissing {
    transform: translateY(100%);
    transition: transform var(--transition-base);
}

/* Modal Handle for Dragging */
.modal-handle-area {
    padding: var(--spacing-md) 0;
    cursor: grab;
    touch-action: none;
    display: flex;
    justify-content: center;
    transition: padding var(--transition-base);
}

.modal-handle-area:active {
    cursor: grabbing;
}

.satisfaction-modal.minimized .modal-handle-area {
    padding: var(--spacing-sm) 0;
    cursor: pointer;
    background-color: var(--color-modal-bg);
}

.modal-handle {
    width: 40px;
    height: 4px;
    background-color: rgba(0, 0, 0, 0.2);
    border-radius: var(--radius-full);
    transition: all var(--transition-fast);
}

.satisfaction-modal.minimized .modal-handle {
    background-color: rgba(0, 0, 0, 0.4);
    height: 5px;
    width: 50px;
}

/* Modal Content */
.modal-content {
    flex: 1;
    padding: 0 var(--spacing-xl) var(--spacing-xl);
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
    position: relative;
    padding-bottom: calc(var(--spacing-xl) + env(safe-area-inset-bottom, 0px));
}

/* Close Button */
.modal-close {
    position: absolute;
    top: var(--spacing-xs);
    right: var(--spacing-md);
    width: var(--touch-target);
    height: var(--touch-target);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-text-secondary);
    background-color: rgba(255, 255, 255, 0.9);
    border-radius: var(--radius-full);
    transition: all var(--transition-fast);
    z-index: 100;
    cursor: pointer;
    box-shadow: var(--shadow-sm);
}

.modal-close:active {
    background-color: rgba(0, 0, 0, 0.1);
    transform: scale(0.9);
}

/* Modal Title */
.modal-title {
    font-size: var(--font-size-xl);
    font-weight: 600;
    color: var(--color-modal-text);
    text-align: center;
    margin-bottom: var(--spacing-lg);
    padding-right: var(--spacing-xl);
    line-height: 1.3;
}

/* Rating Slider Container */
.rating-slider-container {
    margin-bottom: 0;
    padding: var(--spacing-lg) 0;
}

/* Thermometer - Initial State */
.thermometer-container {
    cursor: pointer;
    padding: var(--spacing-xl);
    background-color: rgba(255, 255, 255, 0.6);
    border-radius: var(--radius-lg);
    transition: all var(--transition-base);
    border: 2px solid rgba(0, 0, 0, 0.1);
}

.thermometer-container:hover {
    background-color: rgba(255, 255, 255, 0.9);
    border-color: rgba(59, 130, 246, 0.4);
    transform: translateY(-2px);
}

.thermometer-container:active {
    transform: scale(0.98);
}

.thermometer-prompt {
    text-align: center;
    margin-bottom: var(--spacing-md);
}

.thermometer-text {
    font-size: var(--font-size-base);
    font-weight: 500;
    color: var(--color-text-secondary);
    margin: 0;
}

/* Rating Scale Labels with Emojis */
.rating-scale-labels {
    display: flex;
    justify-content: space-between;
    margin-bottom: var(--spacing-md);
}

.rating-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-xs);
}

.rating-emoji {
    font-size: 2rem;
    line-height: 1;
}

.rating-num {
    font-size: var(--font-size-base);
    font-weight: 700;
    color: var(--color-text-primary);
}

.thermometer-bar {
    height: 48px;
    border-radius: var(--radius-lg);
    overflow: hidden;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.thermometer-bar:hover {
    transform: scale(1.02);
    box-shadow: 0 2px 12px rgba(0, 0, 0, 0.15);
}

.thermometer-bar:active {
    transform: scale(0.98);
}

.thermometer-gradient {
    width: 100%;
    height: 100%;
    background: linear-gradient(to right,
        #ef4444 0%,
        #fbbf24 50%,
        #22c55e 100%
    );
    pointer-events: none;
}

/* Slider Wrapper (hidden initially) */
.slider-wrapper {
    animation: fadeIn var(--transition-base);
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Rating Value Display - Large number above slider */
.rating-value-display {
    display: flex;
    justify-content: center;
    align-items: center;
    margin-bottom: var(--spacing-xl);
    position: relative;
    animation: fadeIn var(--transition-base);
}

.rating-number {
    font-size: 5rem;
    font-weight: 700;
    color: var(--color-rating-active);
    line-height: 1;
    text-shadow: 0 2px 8px rgba(59, 130, 246, 0.2);
    transition: all var(--transition-fast);
    user-select: none;
}

.rating-value-display.animating .rating-number {
    transform: scale(1.1);
}

/* Custom Range Slider */
.rating-slider {
    -webkit-appearance: none;
    appearance: none;
    width: 100%;
    height: 12px;
    border-radius: var(--radius-full);
    background: linear-gradient(to right,
        #ef4444 0%,
        #fbbf24 50%,
        #22c55e 100%
    );
    outline: none;
    margin: var(--spacing-lg) 0;
    cursor: pointer;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

/* Slider Thumb - WebKit (Chrome, Safari, Edge) */
.rating-slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 48px;
    height: 48px;
    border-radius: var(--radius-full);
    background-color: white;
    border: 4px solid var(--color-rating-active);
    cursor: grab;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
    transition: all var(--transition-fast);
}

.rating-slider:active::-webkit-slider-thumb {
    cursor: grabbing;
    transform: scale(1.15);
    box-shadow: 0 6px 16px rgba(59, 130, 246, 0.3);
}

/* Slider Thumb - Firefox */
.rating-slider::-moz-range-thumb {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-full);
    background-color: white;
    border: 4px solid var(--color-rating-active);
    cursor: grab;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
    transition: all var(--transition-fast);
}

.rating-slider:active::-moz-range-thumb {
    cursor: grabbing;
    transform: scale(1.15);
    box-shadow: 0 6px 16px rgba(59, 130, 246, 0.3);
}

/* Slider Track - Firefox */
.rating-slider::-moz-range-track {
    height: 12px;
    border-radius: var(--radius-full);
    background: linear-gradient(to right,
        #ef4444 0%,
        #fbbf24 50%,
        #22c55e 100%
    );
}

/* Rating Labels */
.rating-labels {
    display: flex;
    justify-content: space-between;
    margin-top: var(--spacing-md);
    padding: 0 var(--spacing-xs);
}

.rating-label {
    font-size: var(--font-size-sm);
    font-weight: 500;
    color: var(--color-modal-text);
}

/* Feedback Section */
.feedback-section {
    margin-top: var(--spacing-md);
}

.feedback-title {
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: var(--color-modal-text);
    margin-bottom: var(--spacing-md);
    text-align: center;
    line-height: 1.4;
}

#submitRatingButton {
    width: 100%;
    margin-bottom: var(--spacing-md);
}

.feedback-input-wrapper {
    margin-bottom: var(--spacing-md);
}

.feedback-error {
    color: #ef4444;
    font-size: var(--font-size-sm);
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
    animation: fadeIn var(--transition-fast);
}

.feedback-textarea {
    width: 100%;
    min-height: auto;
    padding: var(--spacing-md);
    border: 1px solid rgba(0, 0, 0, 0.1);
    border-radius: var(--spacing-md);
    background-color: white;
    font-size: var(--font-size-base);
    color: var(--color-text-primary);
    resize: vertical;
    outline: none;
    transition: all var(--transition-fast);
}

.feedback-textarea.error {
    border-color: #ef4444;
    animation: shake 0.5s;
}

@keyframes shake {
    0%, 100% { transform: translateX(0); }
    10%, 30%, 50%, 70%, 90% { transform: translateX(-5px); }
    20%, 40%, 60%, 80% { transform: translateX(5px); }
}

.feedback-textarea:focus {
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

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

/* Modal Actions */
.modal-actions {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.modal-actions .btn {
    width: 100%;
}

.btn {
    min-height: 52px;
    padding: var(--spacing-md) var(--spacing-lg);
    border-radius: var(--spacing-md);
    font-size: var(--font-size-base);
    font-weight: 600;
    text-align: center;
    transition: all var(--transition-fast);
    border: none;
    cursor: pointer;
}

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

.btn-primary {
    background-color: #4caf50;
    color: white;
    box-shadow: 0 2px 8px rgba(76, 175, 80, 0.3);
}

.btn-primary:active {
    background-color: #45a049;
}

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

.btn-secondary:active {
    background-color: var(--color-border-light);
}

/* ========================================
   Responsive Adjustments
   ======================================== */
@media (min-width: 768px) {
    .satisfaction-modal {
        left: 50%;
        right: auto;
        transform: translateX(-50%) translateY(100%);
        max-width: 500px;
        border-radius: var(--radius-xl);
    }

    .satisfaction-modal.active {
        transform: translateX(-50%) translateY(50%);
    }

    .satisfaction-modal.expanded {
        transform: translateX(-50%) translateY(0);
    }

    .satisfaction-modal.minimized {
        transform: translateX(-50%) translateY(calc(100% - 16px));
    }

    .satisfaction-modal.dismissing {
        transform: translateX(-50%) translateY(100%);
    }
}

/* ========================================
   Accessibility & Dark Mode Support
   ======================================== */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* Focus visible for keyboard navigation */
button:focus-visible,
a:focus-visible,
input:focus-visible,
textarea:focus-visible {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
}