/* ============================================================================
   CSS VARIABLES & COLOR PALETTE
   ============================================================================ */
:root {
    /* Primary Colors - Indian Heritage Inspired */
    --color-primary: oklch(0.58 0.15 55);      /* Deep Saffron */
    --color-secondary: oklch(0.75 0.12 85);    /* Turmeric Gold */
    --color-success: oklch(0.45 0.08 145);     /* Cardamom Green */
    --color-accent: oklch(0.55 0.20 25);       /* Vibrant Masala Red */
    
    /* Neutral Colors */
    --color-bg: oklch(0.99 0 0);               /* White */
    --color-cream: oklch(0.95 0.01 73);        /* Warm Cream */
    --color-light-bg: oklch(0.92 0.015 68);    /* Light Beige */
    --color-muted: oklch(0.75 0.02 50);        /* Muted Beige */
    --color-text: oklch(0.25 0.02 45);         /* Dark Text */
    --color-text-muted: oklch(0.48 0.03 50);   /* Medium Text */
    --color-border: oklch(0.85 0.015 65);      /* Light Border */
    
    /* Semantic Colors */
    --color-error: oklch(0.55 0.20 25);        /* Error Red */
    --color-warning: oklch(0.75 0.12 85);      /* Warning Yellow */
    
    /* Typography */
    --font-primary: 'Quicksand', system-ui, -apple-system, sans-serif;
    --font-secondary: 'Inter', system-ui, -apple-system, sans-serif;
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 2.5rem;
    --spacing-2xl: 3rem;
    
    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    
    /* 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);
    
    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 200ms ease;
    --transition-slow: 300ms ease;
}

/* ============================================================================
   RESET & BASE STYLES
   ============================================================================ */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-secondary);
    color: var(--color-text);
    background-color: var(--color-bg);
    line-height: 1.6;
    font-size: 16px;
}

/* ============================================================================
   HEADER & LAYOUT
   ============================================================================ */
.app-container {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    background-color: var(--color-cream);
}

.header {
    background: linear-gradient(135deg, var(--color-primary) 0%, oklch(0.62 0.14 50) 100%);
    color: var(--color-bg);
    padding: var(--spacing-lg);
    box-shadow: var(--shadow-md);
}

.header-content {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: var(--spacing-md);
}

.logo-section {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    flex: 1;
}

.logo {
    height: 60px;
    width: auto;
}

.store-name {
    font-family: var(--font-primary);
    font-size: 2rem;
    font-weight: 600;
    letter-spacing: -0.02em;
    margin: 0;
}

.store-location {
    font-size: 0.875rem;
    opacity: 0.95;
    margin: 0.25rem 0 0 0;
}

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

.user-indicator {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    font-size: 0.875rem;
}

.logout-btn {
    background: rgba(255, 255, 255, 0.2);
    border: 1px solid rgba(255, 255, 255, 0.3);
    color: white;
    padding: 0.5rem 1rem;
    border-radius: var(--radius-md);
    cursor: pointer;
    font-size: 0.875rem;
    transition: all var(--transition-base);
}

.logout-btn:hover {
    background: rgba(255, 255, 255, 0.3);
}

.login-header-btn {
    background: rgba(255, 255, 255, 0.2);
    border: 1px solid rgba(255, 255, 255, 0.3);
    color: white;
    padding: 0.5rem 1rem;
    border-radius: var(--radius-md);
    cursor: pointer;
    font-size: 0.875rem;
    transition: all var(--transition-base);
}

.login-header-btn:hover {
    background: rgba(255, 255, 255, 0.3);
}

/* ============================================================================
   TAB NAVIGATION
   ============================================================================ */
.tab-navigation {
    display: flex;
    gap: var(--spacing-sm);
    padding: var(--spacing-md);
    max-width: 1200px;
    margin: 0 auto;
    width: 100%;
    border-bottom: 2px solid var(--color-border);
    background: var(--color-bg);
    flex-wrap: wrap;
}

.tab-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-sm) var(--spacing-md);
    background: none;
    border: none;
    color: var(--color-text-muted);
    cursor: pointer;
    font-family: var(--font-primary);
    font-weight: 500;
    font-size: 1rem;
    position: relative;
    transition: color var(--transition-base);
    min-height: 44px;
}

#admin-tab-btn {
    display: flex !important;
}

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

.tab-btn.active {
    color: var(--color-primary);
}

.tab-btn.active::after {
    content: '';
    position: absolute;
    bottom: -1rem;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--color-primary);
    border-radius: var(--radius-sm);
}

/* ============================================================================
   MAIN CONTENT
   ============================================================================ */
.main-content {
    flex: 1;
    max-width: 1200px;
    width: 100%;
    margin: 0 auto;
    padding: var(--spacing-lg);
}

.tab-content {
    display: none;
    animation: fadeIn var(--transition-slow);
}

.tab-content.active {
    display: block;
}

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

/* ============================================================================
   FORM STYLES
   ============================================================================ */
.form-container,
.admin-container,
.dashboard-container,
.qr-container,
.settings-container {
    background: var(--color-bg);
    border-radius: var(--radius-xl);
    padding: var(--spacing-xl);
    box-shadow: var(--shadow-md);
    max-width: 600px;
    margin: 0 auto;
}

.dashboard-container,
.qr-container,
.settings-container {
    max-width: 1000px;
}

.form-header,
.admin-header,
.dashboard-header,
.qr-header,
.settings-header {
    margin-bottom: var(--spacing-xl);
    text-align: center;
}

.form-header h2,
.admin-header h2,
.dashboard-header h2,
.qr-header h2,
.settings-header h2 {
    font-family: var(--font-primary);
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
    color: var(--color-primary);
}

.form-header p,
.admin-header p,
.qr-header p {
    color: var(--color-text-muted);
    font-size: 0.95rem;
}

.form-section {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-lg);
}

.form-label {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    font-family: var(--font-secondary);
    font-weight: 500;
    font-size: 0.875rem;
    color: var(--color-text);
}

.label-text {
    flex: 1;
}

.required {
    color: var(--color-accent);
}

.subtitle {
    font-size: 0.75rem;
    color: var(--color-text-muted);
    font-weight: normal;
}

.form-input,
.form-select,
.form-textarea {
    width: 100%;
    padding: 0.75rem var(--spacing-sm);
    border: 2px solid var(--color-border);
    border-radius: var(--radius-md);
    font-family: var(--font-secondary);
    font-size: 1rem;
    color: var(--color-text);
    background: var(--color-bg);
    transition: all var(--transition-base);
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(0, 0, 0, 0.05),
                inset 0 0 0 1px transparent;
    background-color: var(--color-bg);
}

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

.form-textarea {
    resize: vertical;
    min-height: 120px;
    font-family: var(--font-secondary);
}

.textarea-container {
    position: relative;
}

.char-counter {
    position: absolute;
    bottom: 0.75rem;
    right: var(--spacing-sm);
    font-size: 0.75rem;
    color: var(--color-text-muted);
    font-weight: 500;
    background: var(--color-bg);
    padding: 0 var(--spacing-xs);
}

.char-counter.warning {
    color: var(--color-warning);
}

.char-counter.danger {
    color: var(--color-error);
}

.error-message {
    display: none;
    font-size: 0.875rem;
    color: var(--color-error);
    font-weight: 500;
}

.error-message.show {
    display: block;
}

.form-input.error,
.form-select.error,
.form-textarea.error {
    border-color: var(--color-error);
    animation: shake 0.5s;
}

@keyframes shake {
    0%, 100% { transform: translateX(0); }
    25% { transform: translateX(-5px); }
    75% { transform: translateX(5px); }
}

/* ============================================================================
   BUTTONS
   ============================================================================ */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-xs);
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: var(--radius-md);
    font-family: var(--font-secondary);
    font-weight: 500;
    font-size: 1rem;
    cursor: pointer;
    transition: all var(--transition-base);
    min-height: 44px;
    white-space: nowrap;
}

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

.btn-primary:hover {
    background-color: oklch(0.64 0.15 55);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn-primary:active {
    transform: translateY(0);
    box-shadow: var(--shadow-md);
}

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

.btn-secondary:hover {
    background-color: oklch(0.88 0.015 68);
    border-color: var(--color-primary);
}

.btn-secondary:active {
    background-color: oklch(0.85 0.015 65);
}

.btn-full {
    width: 100%;
}

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

/* ============================================================================
   FILE UPLOAD & PHOTOS
   ============================================================================ */
.file-input-wrapper {
    margin-bottom: var(--spacing-md);
}

.photo-preview {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(100px, 1fr));
    gap: var(--spacing-md);
}

.photo-item {
    position: relative;
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-md);
    cursor: pointer;
    transition: all var(--transition-base);
}

.photo-item:hover {
    transform: scale(1.05);
    box-shadow: var(--shadow-lg);
}

.photo-item img {
    width: 100%;
    height: 100px;
    object-fit: cover;
    display: block;
}

.photo-remove {
    position: absolute;
    top: 0;
    right: 0;
    width: 32px;
    height: 32px;
    background: rgba(0, 0, 0, 0.6);
    color: white;
    border: none;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    transition: background var(--transition-base);
}

.photo-remove:hover {
    background: rgba(0, 0, 0, 0.8);
}

/* ============================================================================
   FORM ACTIONS
   ============================================================================ */
.form-actions {
    display: flex;
    gap: var(--spacing-md);
    margin-top: var(--spacing-xl);
    flex-wrap: wrap;
}

.form-actions .btn {
    flex: 1;
    min-width: 150px;
}

/* ============================================================================
   SUCCESS MESSAGE
   ============================================================================ */
.success-message {
    position: fixed;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(0, 0, 0, 0.5);
    z-index: 1000;
    animation: fadeIn var(--transition-base);
}

.success-content {
    background: var(--color-bg);
    border-radius: var(--radius-xl);
    padding: var(--spacing-2xl);
    text-align: center;
    max-width: 400px;
    animation: successBounce 0.6s cubic-bezier(0.68, -0.55, 0.265, 1.55);
}

@keyframes successBounce {
    0% {
        opacity: 0;
        transform: scale(0.8);
    }
    100% {
        opacity: 1;
        transform: scale(1);
    }
}

.success-content i {
    font-size: 3rem;
    color: var(--color-success);
    margin-bottom: var(--spacing-md);
}

.success-content h3 {
    font-family: var(--font-primary);
    font-size: 1.5rem;
    color: var(--color-primary);
    margin-bottom: var(--spacing-sm);
}

.success-content p {
    color: var(--color-text-muted);
    margin-bottom: var(--spacing-lg);
}

/* ============================================================================
   LOGIN & ADMIN STYLES
   ============================================================================ */
.login-form {
    margin-bottom: var(--spacing-xl);
}

.login-help {
    background: var(--color-light-bg);
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    color: var(--color-text-muted);
    font-size: 0.875rem;
    text-align: center;
}

/* ============================================================================
   DASHBOARD & FILTERING
   ============================================================================ */
.filter-section {
    background: var(--color-light-bg);
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    margin-bottom: var(--spacing-xl);
}

.filter-section h3 {
    font-family: var(--font-primary);
    font-weight: 600;
    margin-bottom: var(--spacing-md);
    color: var(--color-primary);
}

.filter-controls {
    display: grid;
    grid-template-columns: 1fr 1fr auto auto;
    gap: var(--spacing-md);
    align-items: flex-end;
}

.filter-input {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.filter-input label {
    font-weight: 500;
    font-size: 0.875rem;
    color: var(--color-text);
}

.feedback-list-container {
    margin-top: var(--spacing-xl);
}

.feedback-list-container h3 {
    font-family: var(--font-primary);
    font-weight: 600;
    margin-bottom: var(--spacing-md);
    color: var(--color-primary);
}

.feedback-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.feedback-card {
    background: var(--color-light-bg);
    border-left: 4px solid var(--color-primary);
    padding: var(--spacing-lg);
    border-radius: var(--radius-md);
    transition: all var(--transition-base);
}

.feedback-card:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}

.feedback-header {
    display: flex;
    justify-content: space-between;
    align-items: start;
    margin-bottom: var(--spacing-md);
    gap: var(--spacing-md);
    flex-wrap: wrap;
}

.feedback-title {
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: var(--spacing-xs);
}

.feedback-timestamp {
    font-size: 0.875rem;
    color: var(--color-text-muted);
}

.feedback-category {
    display: inline-flex;
    gap: var(--spacing-xs);
}

.badge {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    background: var(--color-secondary);
    color: var(--color-text);
    border-radius: var(--radius-sm);
    font-size: 0.875rem;
    font-weight: 500;
}

.feedback-details {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
}

.detail-row {
    display: flex;
    gap: var(--spacing-md);
}

.detail-label {
    font-weight: 600;
    color: var(--color-text);
    min-width: 120px;
}

.detail-value {
    color: var(--color-text-muted);
    flex: 1;
    word-break: break-word;
}

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

.feedback-photo {
    aspect-ratio: 1;
    border-radius: var(--radius-md);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    cursor: pointer;
    transition: transform var(--transition-base);
}

.feedback-photo:hover {
    transform: scale(1.1);
}

.feedback-photo img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.empty-state {
    text-align: center;
    padding: var(--spacing-2xl);
    color: var(--color-text-muted);
}

.empty-state i {
    font-size: 2.5rem;
    color: var(--color-border);
    margin-bottom: var(--spacing-md);
}

/* ============================================================================
   QR CODE
   ============================================================================ */
.qr-content {
    display: flex;
    justify-content: center;
    margin-bottom: var(--spacing-xl);
}

.qr-display {
    background: var(--color-bg);
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
}

.qr-actions {
    display: flex;
    gap: var(--spacing-md);
    justify-content: center;
    margin-bottom: var(--spacing-xl);
    flex-wrap: wrap;
}

.qr-info {
    background: var(--color-light-bg);
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    text-align: center;
}

.qr-info code {
    display: block;
    margin-top: var(--spacing-sm);
    padding: var(--spacing-sm);
    background: var(--color-bg);
    border-radius: var(--radius-sm);
    font-family: monospace;
    font-size: 0.875rem;
    word-break: break-all;
    color: var(--color-primary);
}

/* ============================================================================
   SETTINGS
   ============================================================================ */
.switch-group {
    display: flex;
    align-items: center;
}

.switch-label {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    cursor: pointer;
}

.switch-input {
    display: none;
}

.switch-slider {
    width: 50px;
    height: 28px;
    background-color: var(--color-border);
    border-radius: 14px;
    position: relative;
    transition: background-color var(--transition-base);
}

.switch-slider::before {
    content: '';
    position: absolute;
    width: 24px;
    height: 24px;
    border-radius: 50%;
    background-color: var(--color-bg);
    top: 2px;
    left: 2px;
    transition: left var(--transition-base);
    box-shadow: var(--shadow-sm);
}

.switch-input:checked + .switch-slider {
    background-color: var(--color-success);
}

.switch-input:checked + .switch-slider::before {
    left: 24px;
}

.switch-text {
    font-weight: 500;
    color: var(--color-text);
}

.settings-help {
    background: var(--color-light-bg);
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    color: var(--color-text-muted);
    font-size: 0.875rem;
}

/* ============================================================================
   MODAL
   ============================================================================ */
.modal {
    position: fixed;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(0, 0, 0, 0.7);
    z-index: 999;
    padding: var(--spacing-lg);
}

.modal-content {
    position: relative;
    max-width: 90vw;
    max-height: 90vh;
    background: white;
    border-radius: var(--radius-lg);
}

.modal-close {
    position: absolute;
    top: -40px;
    right: 0;
    background: none;
    border: none;
    color: white;
    font-size: 2rem;
    cursor: pointer;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-base);
}

.modal-close:hover {
    color: var(--color-secondary);
}

.modal-image {
    max-width: 100%;
    max-height: 100%;
    object-fit: contain;
}

.login-modal-content {
    max-width: 450px;
    max-height: 90vh;
    overflow-y: auto;
}

/* ============================================================================
   RESPONSIVE DESIGN
   ============================================================================ */
@media (max-width: 768px) {
    :root {
        --spacing-lg: 1.5rem;
        --spacing-xl: 2rem;
        --spacing-2xl: 2.5rem;
    }

    .main-content {
        padding: var(--spacing-md);
    }

    .header-content {
        flex-direction: column;
        text-align: center;
    }

    .logo-section {
        flex-direction: column;
        width: 100%;
    }

    .store-name {
        font-size: 1.5rem;
    }

    .header-actions {
        width: 100%;
        justify-content: center;
    }

    .tab-navigation {
        padding: var(--spacing-sm);
        gap: var(--spacing-xs);
    }

    .tab-btn {
        padding: var(--spacing-sm);
        font-size: 0.875rem;
        flex: 1;
        min-width: 80px;
    }

    .tab-label {
        display: none;
    }

    .tab-btn {
        flex-direction: column;
        gap: 0.25rem;
    }

    .tab-btn i {
        font-size: 1.25rem;
    }

    .filter-controls {
        grid-template-columns: 1fr;
    }

    .filter-controls .btn {
        width: 100%;
    }

    .form-actions {
        flex-direction: column;
    }

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

    .form-container,
    .admin-container,
    .dashboard-container,
    .qr-container,
    .settings-container {
        padding: var(--spacing-lg);
        border-radius: var(--radius-lg);
    }

    .success-content {
        margin: var(--spacing-lg);
    }

    .qr-actions {
        flex-direction: column;
    }

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

    .photo-preview {
        grid-template-columns: repeat(auto-fill, minmax(80px, 1fr));
    }
}

@media (max-width: 480px) {
    :root {
        font-size: 14px;
    }

    .store-name {
        font-size: 1.25rem;
    }

    .store-location {
        font-size: 0.75rem;
    }

    .tab-btn i {
        font-size: 1rem;
    }

    .feedback-header {
        flex-direction: column;
    }

    .detail-row {
        flex-direction: column;
    }

    .detail-label {
        min-width: auto;
    }

    .main-content {
        padding: var(--spacing-sm);
    }

    .form-container,
    .admin-container,
    .dashboard-container,
    .qr-container,
    .settings-container {
        padding: var(--spacing-md);
    }

    .form-header h2,
    .admin-header h2,
    .dashboard-header h2,
    .qr-header h2,
    .settings-header h2 {
        font-size: 1.25rem;
    }

    .modal-close {
        top: 10px;
        right: 10px;
        background: rgba(0, 0, 0, 0.5);
        border-radius: 50%;
        width: 32px;
        height: 32px;
        font-size: 1.5rem;
    }
}

/* ============================================================================
   PRINT STYLES
   ============================================================================ */
@media print {
    body {
        background: white;
    }

    .header,
    .tab-navigation,
    .form-actions,
    .filter-section,
    .qr-actions,
    .settings-form {
        display: none;
    }

    .modal {
        background: white;
    }

    .qr-display {
        box-shadow: none;
        border: 1px solid #ccc;
    }
}