/* Glass Optimizer - Main CSS Framework */

/* CSS Custom Properties (Variables) */
:root {
    /* Colors */
    --primary-color: #1976d2;
    --primary-dark: #1565c0;
    --primary-light: #42a5f5;
    --secondary-color: #ff5722;
    --secondary-dark: #d84315;
    --secondary-light: #ff8a65;

    --background-color: #fafafa;
    --surface-color: #ffffff;
    --surface-variant: #f5f5f5;
    --border-color: #e0e0e0;
    --divider-color: #bdbdbd;

    --text-primary: #212121;
    --text-secondary: #757575;
    --text-hint: #9e9e9e;
    --text-on-primary: #ffffff;
    --text-on-secondary: #ffffff;

    --success-color: #4caf50;
    --warning-color: #ff9800;
    --error-color: #f44336;
    --info-color: #2196f3;

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

    /* Typography */
    --font-family: "Roboto", "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
    --font-family-mono: "Roboto Mono", "Consolas", "Monaco", monospace;

    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-md: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-xxl: 1.5rem;
    --font-size-xxxl: 2rem;

    --font-weight-light: 300;
    --font-weight-normal: 400;
    --font-weight-medium: 500;
    --font-weight-bold: 700;

    --line-height-tight: 1.25;
    --line-height-normal: 1.5;
    --line-height-relaxed: 1.75;

    /* 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);

    /* Borders */
    --border-radius-sm: 0.25rem;
    --border-radius-md: 0.375rem;
    --border-radius-lg: 0.5rem;
    --border-radius-xl: 0.75rem;
    --border-radius-full: 9999px;

    --border-width-thin: 1px;
    --border-width-medium: 2px;
    --border-width-thick: 3px;

    /* Transitions */
    --transition-fast: 150ms ease-in-out;
    --transition-normal: 250ms ease-in-out;
    --transition-slow: 350ms ease-in-out;

    /* Z-index layers */
    --z-dropdown: 1000;
    --z-sticky: 1010;
    --z-fixed: 1020;
    --z-modal-backdrop: 1030;
    --z-modal: 1040;
    --z-popover: 1050;
    --z-tooltip: 1060;
}

/* Reset and Base Styles */
*,
*::before,
*::after {
    box-sizing: border-box;
}

html {
    height: 100%;
    scroll-behavior: smooth;
}

body {
    margin: 0;
    padding: 0;
    font-family: var(--font-family);
    font-size: var(--font-size-md);
    line-height: var(--line-height-normal);
    color: var(--text-primary);
    background-color: var(--background-color);
    min-height: 100vh;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Typography */
h1,
h2,
h3,
h4,
h5,
h6 {
    margin: 0 0 var(--spacing-md) 0;
    font-weight: var(--font-weight-medium);
    line-height: var(--line-height-tight);
}

h1 {
    font-size: var(--font-size-xxxl);
}
h2 {
    font-size: var(--font-size-xxl);
}
h3 {
    font-size: var(--font-size-xl);
}
h4 {
    font-size: var(--font-size-lg);
}
h5 {
    font-size: var(--font-size-md);
}
h6 {
    font-size: var(--font-size-sm);
}

p {
    margin: 0 0 var(--spacing-md) 0;
}

a {
    color: var(--primary-color);
    text-decoration: none;
    transition: color var(--transition-fast);
}

a:hover {
    color: var(--primary-dark);
    text-decoration: underline;
}

/* Layout Components */
.app-container {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

.app-header {
    background-color: var(--primary-color);
    color: var(--text-on-primary);
    padding: var(--spacing-md) var(--spacing-lg);
    box-shadow: var(--shadow-md);
    position: sticky;
    top: 0;
    z-index: var(--z-sticky);
}

.app-main {
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow: auto;
}

.app-footer {
    background-color: var(--surface-color);
    border-top: var(--border-width-thin) solid var(--border-color);
    padding: var(--spacing-md) var(--spacing-lg);
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
}

/* Navigation */
.nav-brand {
    font-size: var(--font-size-xl);
    font-weight: var(--font-weight-bold);
    margin: 0;
}

.nav-links {
    display: flex;
    gap: var(--spacing-lg);
    list-style: none;
    margin: 0;
    padding: 0;
}

.nav-link {
    color: var(--text-on-primary);
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--border-radius-md);
    transition: background-color var(--transition-fast);
}

.nav-link:hover {
    background-color: rgba(255, 255, 255, 0.1);
    text-decoration: none;
    color: var(--text-on-primary);
}

.nav-link.active {
    background-color: rgba(255, 255, 255, 0.2);
}

/* Main Content Area */
.main-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.content-header {
    background-color: var(--surface-color);
    border-bottom: var(--border-width-thin) solid var(--border-color);
    padding: var(--spacing-md) var(--spacing-lg);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.content-body {
    flex: 1;
    padding: var(--spacing-lg);
    overflow: auto;
}

/* Sidebar */
.sidebar {
    width: 300px;
    background-color: var(--surface-color);
    border-right: var(--border-width-thin) solid var(--border-color);
    padding: var(--spacing-lg);
    overflow-y: auto;
    flex-shrink: 0;
}

.sidebar-title {
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-medium);
    margin-bottom: var(--spacing-md);
    color: var(--text-primary);
    border-bottom: var(--border-width-thin) solid var(--border-color);
    padding-bottom: var(--spacing-sm);
}

/* Button Components */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-md);
    font-family: var(--font-family);
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    line-height: 1;
    border: var(--border-width-thin) solid transparent;
    border-radius: var(--border-radius-md);
    cursor: pointer;
    transition: all var(--transition-fast);
    text-decoration: none;
    user-select: none;
    white-space: nowrap;
}

.btn:hover {
    text-decoration: none;
}

.btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    pointer-events: none;
}

.btn-primary {
    background-color: var(--primary-color);
    color: var(--text-on-primary);
    border-color: var(--primary-color);
}

.btn-primary:hover:not(:disabled) {
    background-color: var(--primary-dark);
    border-color: var(--primary-dark);
}

.btn-secondary {
    background-color: var(--secondary-color);
    color: var(--text-on-secondary);
    border-color: var(--secondary-color);
}

.btn-secondary:hover:not(:disabled) {
    background-color: var(--secondary-dark);
    border-color: var(--secondary-dark);
}

.btn-outline {
    background-color: transparent;
    color: var(--primary-color);
    border-color: var(--primary-color);
}

.btn-outline:hover:not(:disabled) {
    background-color: var(--primary-color);
    color: var(--text-on-primary);
}

.btn-ghost {
    background-color: transparent;
    color: inherit;
    border-color: transparent;
}

.btn-ghost:hover:not(:disabled) {
    background-color: rgba(0, 0, 0, 0.05);
}

.btn-sm {
    padding: var(--spacing-xs) var(--spacing-sm);
    font-size: var(--font-size-xs);
}

.btn-lg {
    padding: var(--spacing-md) var(--spacing-lg);
    font-size: var(--font-size-md);
}

/* Form Components */
.form-group {
    margin-bottom: var(--spacing-md);
}

.form-label {
    display: block;
    margin-bottom: var(--spacing-xs);
    font-weight: var(--font-weight-medium);
    color: var(--text-primary);
}

.form-input,
.form-textarea,
.form-select {
    width: 100%;
    padding: var(--spacing-sm) var(--spacing-md);
    font-family: var(--font-family);
    font-size: var(--font-size-sm);
    line-height: var(--line-height-normal);
    color: var(--text-primary);
    background-color: var(--surface-color);
    border: var(--border-width-thin) solid var(--border-color);
    border-radius: var(--border-radius-md);
    transition:
        border-color var(--transition-fast),
        box-shadow var(--transition-fast);
}

.form-input:focus,
.form-textarea:focus,
.form-select:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(25, 118, 210, 0.1);
}

.form-textarea {
    resize: vertical;
    min-height: 80px;
}

.form-error {
    margin-top: var(--spacing-xs);
    font-size: var(--font-size-xs);
    color: var(--error-color);
}

/* Card Components */
.card {
    background-color: var(--surface-color);
    border: var(--border-width-thin) solid var(--border-color);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-sm);
    overflow: hidden;
}

.card-header {
    padding: var(--spacing-md) var(--spacing-lg);
    border-bottom: var(--border-width-thin) solid var(--border-color);
    background-color: var(--surface-variant);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.card-title {
    margin: 0;
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-medium);
    color: var(--text-primary);
}

.card-body {
    padding: var(--spacing-lg);
}

.card-footer {
    padding: var(--spacing-md) var(--spacing-lg);
    border-top: var(--border-width-thin) solid var(--border-color);
    background-color: var(--surface-variant);
}

/* Alert Components */
.alert {
    padding: var(--spacing-md);
    border: var(--border-width-thin) solid;
    border-radius: var(--border-radius-md);
    margin-bottom: var(--spacing-md);
}

.alert-success {
    background-color: rgba(76, 175, 80, 0.1);
    border-color: var(--success-color);
    color: var(--success-color);
}

.alert-warning {
    background-color: rgba(255, 152, 0, 0.1);
    border-color: var(--warning-color);
    color: var(--warning-color);
}

.alert-error {
    background-color: rgba(244, 67, 54, 0.1);
    border-color: var(--error-color);
    color: var(--error-color);
}

.alert-info {
    background-color: rgba(33, 150, 243, 0.1);
    border-color: var(--info-color);
    color: var(--info-color);
}

/* Modal Components */
.modal-backdrop {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    z-index: var(--z-modal-backdrop);
    display: flex;
    align-items: center;
    justify-content: center;
}

.modal {
    background-color: var(--surface-color);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-xl);
    max-width: 90vw;
    max-height: 90vh;
    overflow: hidden;
    display: flex;
    flex-direction: column;
}

.modal-header {
    padding: var(--spacing-lg);
    border-bottom: var(--border-width-thin) solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.modal-title {
    margin: 0;
    font-size: var(--font-size-xl);
    font-weight: var(--font-weight-medium);
}

.modal-close {
    background: none;
    border: none;
    font-size: var(--font-size-xl);
    cursor: pointer;
    padding: 0;
    color: var(--text-hint);
    transition: color var(--transition-fast);
}

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

.modal-body {
    padding: var(--spacing-lg);
    overflow-y: auto;
    flex: 1;
}

.modal-footer {
    padding: var(--spacing-lg);
    border-top: var(--border-width-thin) solid var(--border-color);
    display: flex;
    justify-content: flex-end;
    gap: var(--spacing-sm);
}

/* Loading States */
.spinner {
    width: 40px;
    height: 40px;
    border: 4px solid var(--border-color);
    border-top: 4px solid var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% {
        transform: rotate(0deg);
    }
    100% {
        transform: rotate(360deg);
    }
}

.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(0, 0, 0, 0.5);
    z-index: 9998;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-direction: column;
}

/* Tooltip */
.tooltip {
    position: relative;
}

.tooltip:hover::after {
    content: attr(data-tooltip);
    position: absolute;
    bottom: 100%;
    left: 50%;
    transform: translateX(-50%);
    background-color: var(--text-primary);
    color: var(--surface-color);
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--border-radius-sm);
    font-size: var(--font-size-xs);
    white-space: nowrap;
    z-index: var(--z-tooltip);
    margin-bottom: 5px;
}

/* Grid System */
.grid {
    display: grid;
    gap: var(--spacing-md);
}

.grid-cols-1 {
    grid-template-columns: repeat(1, minmax(0, 1fr));
}
.grid-cols-2 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
}
.grid-cols-3 {
    grid-template-columns: repeat(3, minmax(0, 1fr));
}
.grid-cols-4 {
    grid-template-columns: repeat(4, minmax(0, 1fr));
}
.grid-cols-6 {
    grid-template-columns: repeat(6, minmax(0, 1fr));
}

/* Flexbox Utilities */
.flex {
    display: flex;
}
.inline-flex {
    display: inline-flex;
}
.flex-col {
    flex-direction: column;
}
.flex-wrap {
    flex-wrap: wrap;
}
.items-center {
    align-items: center;
}
.items-start {
    align-items: flex-start;
}
.items-end {
    align-items: flex-end;
}
.justify-center {
    justify-content: center;
}
.justify-between {
    justify-content: space-between;
}
.justify-start {
    justify-content: flex-start;
}
.justify-end {
    justify-content: flex-end;
}
.flex-1 {
    flex: 1;
}
.flex-shrink-0 {
    flex-shrink: 0;
}

/* Spacing Utilities */
.gap-xs {
    gap: var(--spacing-xs);
}
.gap-sm {
    gap: var(--spacing-sm);
}
.gap-md {
    gap: var(--spacing-md);
}
.gap-lg {
    gap: var(--spacing-lg);
}
.gap-xl {
    gap: var(--spacing-xl);
}

/* Margin Utilities */
.m-0 {
    margin: 0;
}
.m-auto {
    margin: auto;
}
.mx-auto {
    margin-left: auto;
    margin-right: auto;
}
.mx-md {
    margin-left: var(--spacing-md);
    margin-right: var(--spacing-md);
}
.my-auto {
    margin-top: auto;
    margin-bottom: auto;
}
.mt-0 {
    margin-top: 0;
}
.mt-1 {
    margin-top: 0.25rem;
}
.mt-2 {
    margin-top: 0.5rem;
}
.mt-md {
    margin-top: var(--spacing-md);
}
.mt-sm {
    margin-top: var(--spacing-sm);
}
.mr-0 {
    margin-right: 0;
}
.mr-1 {
    margin-right: 0.25rem;
}
.mr-2 {
    margin-right: 0.5rem;
}
.mr-md {
    margin-right: var(--spacing-md);
}
.mb-0 {
    margin-bottom: 0;
}
.mb-1 {
    margin-bottom: 0.25rem;
}
.mb-2 {
    margin-bottom: 0.5rem;
}
.mb-xs {
    margin-bottom: var(--spacing-xs);
}
.mb-sm {
    margin-bottom: var(--spacing-sm);
}
.mb-md {
    margin-bottom: var(--spacing-md);
}
.mb-lg {
    margin-bottom: var(--spacing-lg);
}
.mb-xl {
    margin-bottom: var(--spacing-xl);
}
.ml-0 {
    margin-left: 0;
}
.ml-1 {
    margin-left: 0.25rem;
}
.ml-2 {
    margin-left: 0.5rem;
}
.ml-lg {
    margin-left: var(--spacing-lg);
}

/* Padding Utilities */
.p-0 {
    padding: 0;
}
.p-sm {
    padding: var(--spacing-sm);
}
.p-md {
    padding: var(--spacing-md);
}
.p-lg {
    padding: var(--spacing-lg);
}
.px-0 {
    padding-left: 0;
    padding-right: 0;
}
.px-sm {
    padding-left: var(--spacing-sm);
    padding-right: var(--spacing-sm);
}
.py-0 {
    padding-top: 0;
    padding-bottom: 0;
}
.py-xs {
    padding-top: var(--spacing-xs);
    padding-bottom: var(--spacing-xs);
}
.py-sm {
    padding-top: var(--spacing-sm);
    padding-bottom: var(--spacing-sm);
}
.py-md {
    padding-top: var(--spacing-md);
    padding-bottom: var(--spacing-md);
}
.py-lg {
    padding-top: var(--spacing-lg);
    padding-bottom: var(--spacing-lg);
}

/* Space Between Utilities */
.space-y-xs > * + * {
    margin-top: var(--spacing-xs);
}
.space-y-sm > * + * {
    margin-top: var(--spacing-sm);
}
.space-y-md > * + * {
    margin-top: var(--spacing-md);
}
.space-y-lg > * + * {
    margin-top: var(--spacing-lg);
}

/* Text Utilities */
.text-xs {
    font-size: var(--font-size-xs);
}
.text-sm {
    font-size: var(--font-size-sm);
}
.text-md {
    font-size: var(--font-size-md);
}
.text-lg {
    font-size: var(--font-size-lg);
}
.text-xl {
    font-size: var(--font-size-xl);
}
.text-xxl {
    font-size: var(--font-size-xxl);
}
.text-xxxl {
    font-size: var(--font-size-xxxl);
}

.font-light {
    font-weight: var(--font-weight-light);
}
.font-normal {
    font-weight: var(--font-weight-normal);
}
.font-medium {
    font-weight: var(--font-weight-medium);
}
.font-bold {
    font-weight: var(--font-weight-bold);
}

.text-center {
    text-align: center;
}
.text-left {
    text-align: left;
}
.text-right {
    text-align: right;
}

.text-primary {
    color: var(--text-primary);
}
.text-secondary {
    color: var(--text-secondary);
}
.text-hint {
    color: var(--text-hint);
}
.text-success {
    color: var(--success-color);
}
.text-warning {
    color: var(--warning-color);
}
.text-error {
    color: var(--error-color);
}
.text-info {
    color: var(--info-color);
}
.text-on-primary {
    color: var(--text-on-primary);
}
.text-white {
    color: white;
}

/* Width & Height Utilities */
.w-full {
    width: 100%;
}
.w-auto {
    width: auto;
}
.w-2 {
    width: 0.5rem;
}
.w-4 {
    width: 1rem;
}
.w-8 {
    width: 2rem;
}
.w-12 {
    width: 3rem;
}
.w-16 {
    width: 4rem;
}
.w-48 {
    width: 12rem;
}
.h-2 {
    height: 0.5rem;
}
.h-4 {
    height: 1rem;
}
.h-8 {
    height: 2rem;
}
.h-12 {
    height: 3rem;
}
.h-16 {
    height: 4rem;
}
.h-full {
    height: 100%;
}
.min-w-0 {
    min-width: 0;
}

/* Background Color Utilities */
.bg-primary {
    background-color: var(--primary-color);
}
.bg-primary-light {
    background-color: var(--primary-light);
}
.bg-secondary {
    background-color: var(--secondary-color);
}
.bg-success {
    background-color: var(--success-color);
}
.bg-success-light {
    background-color: rgba(76, 175, 80, 0.1);
}
.bg-warning {
    background-color: var(--warning-color);
}
.bg-warning-light {
    background-color: rgba(255, 152, 0, 0.1);
}
.bg-error {
    background-color: var(--error-color);
}
.bg-info {
    background-color: var(--info-color);
}
.bg-info-light {
    background-color: rgba(33, 150, 243, 0.1);
}
.bg-surface-variant {
    background-color: var(--surface-variant);
}
.bg-white {
    background-color: white;
}

/* Border Utilities */
.border {
    border: var(--border-width-thin) solid var(--border-color);
}
.border-r {
    border-right: var(--border-width-thin) solid var(--border-color);
}
.border-primary {
    border-color: var(--primary-color);
}
.rounded {
    border-radius: var(--border-radius-md);
}
.rounded-sm {
    border-radius: var(--border-radius-sm);
}
.rounded-md {
    border-radius: var(--border-radius-md);
}
.rounded-lg {
    border-radius: var(--border-radius-lg);
}
.rounded-full {
    border-radius: var(--border-radius-full);
}

/* Display Utilities */
.inline {
    display: inline;
}
.inline-block {
    display: inline-block;
}
.block {
    display: block;
}
.hidden {
    display: none;
}

/* Position Utilities */
.relative {
    position: relative;
}
.absolute {
    position: absolute;
}
.fixed {
    position: fixed;
}
.sticky {
    position: sticky;
}

/* Opacity Utilities */
.opacity-0 {
    opacity: 0;
}
.opacity-50 {
    opacity: 0.5;
}
.opacity-100 {
    opacity: 1;
}

/* Overflow Utilities */
.overflow-auto {
    overflow: auto;
}
.overflow-hidden {
    overflow: hidden;
}
.overflow-visible {
    overflow: visible;
}
.truncate {
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

/* Cursor Utilities */
.cursor-pointer {
    cursor: pointer;
}
.cursor-default {
    cursor: default;
}

/* Badge Utilities */
.badge {
    display: inline-flex;
    align-items: center;
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--border-radius-full);
    font-size: var(--font-size-xs);
    font-weight: var(--font-weight-medium);
    line-height: 1;
}

.badge-sm {
    padding: 0.125rem 0.375rem;
    font-size: 0.625rem;
}

/* Transitions */
.transition-colors {
    transition:
        background-color var(--transition-fast),
        border-color var(--transition-fast),
        color var(--transition-fast);
}

/* Hover States */
.hover\:bg-surface-variant:hover {
    background-color: var(--surface-variant);
}
.hover\:border-primary:hover {
    border-color: var(--primary-color);
}

/* Mobile Menu Toggle - Always Visible */
.mobile-menu-toggle {
    display: none;
    align-items: center;
    justify-content: center;
    background: none;
    border: none;
    color: white;
    font-size: 1.5rem;
    padding: 0.5rem;
    cursor: pointer;
    min-height: 44px;
    min-width: 44px;
    border-radius: 6px;
    touch-action: manipulation;
    -webkit-tap-highlight-color: transparent;
    user-select: none;
    position: absolute;
    top: 50%;
    left: 1rem;
    transform: translateY(-50%);
    z-index: 1001;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
    backdrop-filter: blur(4px);
}

.mobile-menu-toggle:hover {
    background-color: rgba(255, 255, 255, 0.15);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.25);
    transform: translateY(-50%) scale(1.05);
}

.mobile-menu-toggle:active {
    background-color: rgba(255, 255, 255, 0.25);
    transform: translateY(-50%) scale(0.95);
    box-shadow: 0 1px 2px rgba(0, 0, 0, 0.1);
}

.mobile-menu-toggle.menu-open {
    transform: translateY(-50%) rotate(90deg);
    background-color: rgba(255, 255, 255, 0.25);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
}

/* Mobile close button inside sidebar */
.mobile-close-btn {
    position: absolute !important;
    top: 1rem !important;
    right: 1rem !important;
    background: rgba(255, 255, 255, 0.15) !important;
    border: 2px solid rgba(255, 255, 255, 0.2) !important;
    border-radius: 8px !important;
    color: white !important;
    font-size: 1.25rem !important;
    font-weight: bold !important;
    padding: 8px !important;
    cursor: pointer !important;
    min-height: 40px !important;
    min-width: 40px !important;
    display: flex !important;
    align-items: center !important;
    justify-content: center !important;
    z-index: 1001 !important;
    transition: all 0.2s ease !important;
    touch-action: manipulation !important;
    -webkit-tap-highlight-color: transparent !important;
    user-select: none !important;
}

.mobile-close-btn:hover,
.mobile-close-btn:focus {
    background: rgba(255, 255, 255, 0.25) !important;
    border-color: rgba(255, 255, 255, 0.4) !important;
    transform: scale(1.1) !important;
}

.mobile-close-btn:active {
    background: rgba(255, 255, 255, 0.35) !important;
    transform: scale(0.95) !important;
}

/* Responsive Design */
/* User Menu Dropdown Styles */
.user-menu {
    position: relative;
    display: inline-block;
}

.user-menu-trigger {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--border-radius-md);
    cursor: pointer;
    transition: background-color var(--transition-fast);
}

.user-menu-trigger:hover {
    background-color: rgba(255, 255, 255, 0.1);
}

.user-name {
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    max-width: 120px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.dropdown-chevron {
    transition: transform var(--transition-fast);
}

.user-menu-trigger[aria-expanded="true"] .dropdown-chevron {
    transform: rotate(180deg);
}

.user-dropdown-menu {
    position: absolute;
    top: calc(100% + var(--spacing-xs));
    right: 0;
    min-width: 280px;
    background: var(--surface-color);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-lg);
    z-index: var(--z-dropdown);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-8px);
    transition: all var(--transition-fast);
}

.user-dropdown-menu.show {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.user-info {
    padding: var(--spacing-lg);
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.user-avatar {
    width: 40px;
    height: 40px;
    border-radius: var(--border-radius-full);
    background: var(--primary-light);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-on-primary);
    flex-shrink: 0;
}

.user-details {
    flex: 1;
    min-width: 0;
}

.user-full-name {
    font-weight: var(--font-weight-medium);
    color: var(--text-primary);
    margin-bottom: 2px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.user-email {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.dropdown-divider {
    height: 1px;
    background: var(--border-color);
    margin: 0;
}

.dropdown-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-lg);
    color: var(--text-primary);
    text-decoration: none;
    transition: background-color var(--transition-fast);
    border: none;
    background: none;
    width: 100%;
    text-align: left;
    cursor: pointer;
    font-size: var(--font-size-sm);
}

.dropdown-item:hover {
    background-color: var(--surface-variant);
    color: var(--text-primary);
    text-decoration: none;
}

.dropdown-item svg {
    flex-shrink: 0;
    opacity: 0.7;
}

.dropdown-item.logout-btn {
    color: var(--error-color);
}

.dropdown-item.logout-btn:hover {
    background-color: rgba(244, 67, 54, 0.08);
    color: var(--error-color);
}

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

/* Mobile Responsive Design */
@media (max-width: 768px) {
    .app-main {
        flex-direction: column;
    }

    .grid-cols-2,
    .grid-cols-3,
    .grid-cols-4 {
        grid-template-columns: 1fr;
    }

    /* Mobile Navigation */
    .app-header {
        padding: 0.75rem 1rem;
        min-height: 60px;
        position: relative;
    }

    .app-header nav {
        display: none;
        position: fixed;
        top: 0;
        left: -100%;
        width: 280px;
        height: 100vh;
        background: var(--primary-color, #2563eb);
        padding: 4rem 1.5rem 1.5rem 1.5rem;
        box-shadow: 4px 0 24px rgba(0, 0, 0, 0.25);
        z-index: 1000;
        backdrop-filter: blur(8px);
        border-right: 1px solid rgba(255, 255, 255, 0.1);
        transition: left 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        opacity: 1;
        visibility: visible;
        overflow-y: auto;
    }

    .app-header nav.mobile-open {
        display: flex !important;
        left: 0 !important;
    }

    /* Show hamburger menu on mobile */
    .mobile-menu-toggle {
        display: flex !important;
    }

    .nav-links {
        display: flex !important;
        flex-direction: column !important;
        gap: 0.75rem !important;
        margin: 0 !important;
        padding: 0 !important;
        list-style: none !important;
        width: 100% !important;
    }

    .nav-link {
        display: block !important;
        width: 100% !important;
        padding: 16px 20px !important;
        color: white !important;
        text-decoration: none !important;
        min-height: 48px !important;
        border-radius: 8px !important;
        transition: all 0.2s ease !important;
        -webkit-tap-highlight-color: transparent !important;
        user-select: none !important;
        touch-action: manipulation !important;
        font-size: 16px !important;
        font-weight: 500 !important;
        border: 1px solid transparent !important;
        background-color: transparent !important;
        text-align: left !important;
        cursor: pointer !important;
    }

    .nav-link:hover,
    .nav-link:focus {
        background-color: rgba(255, 255, 255, 0.15) !important;
        border-color: rgba(255, 255, 255, 0.3) !important;
        box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15) !important;
    }

    .nav-link:active {
        background-color: rgba(255, 255, 255, 0.25) !important;
        transform: scale(0.98) !important;
        box-shadow: inset 0 2px 4px rgba(0, 0, 0, 0.1) !important;
    }

    .nav-link.active {
        background-color: rgba(255, 255, 255, 0.25);
        border-color: rgba(255, 255, 255, 0.4);
        font-weight: 600;
        box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    }

    .nav-link svg {
        width: 18px;
        height: 18px;
        opacity: 0.9;
    }

    /* Mobile Buttons */
    .btn,
    button,
    [role="button"] {
        min-height: 44px !important;
        min-width: 44px !important;
        padding: 12px 16px !important;
        font-size: 16px !important;
        touch-action: manipulation !important;
        -webkit-tap-highlight-color: rgba(0, 0, 0, 0.1) !important;
        user-select: none !important;
    }

    /* Mobile Forms */
    input,
    select,
    textarea {
        font-size: 16px !important;
        padding: 12px !important;
        min-height: 44px !important;
        touch-action: manipulation !important;
    }

    /* Mobile Cards and Lists */
    .card,
    .project-node,
    .project-item {
        min-height: 44px;
        padding: 12px;
        margin: 4px 0;
        border-radius: 4px;
        touch-action: manipulation;
    }

    /* Mobile Modal */
    .modal {
        padding: 1rem;
        align-items: flex-start;
        padding-top: 2rem;
    }

    .modal-content {
        width: 100%;
        max-width: none;
        margin: 0;
        border-radius: 8px 8px 0 0;
    }
}

@media (max-width: 480px) {
    :root {
        --spacing-md: 0.75rem;
        --spacing-lg: 1rem;
        --spacing-xl: 1.5rem;
    }

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

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

    /* Extra small screen optimizations */
    .btn-sm {
        min-height: 40px !important;
        min-width: 40px !important;
        padding: 8px 12px !important;
        font-size: 14px !important;
    }

    .nav-brand h1,
    .nav-brand a {
        font-size: 1.125rem !important;
    }

    /* Ensure hamburger menu is always accessible on small screens */
    .mobile-menu-toggle {
        font-size: 1.25rem !important;
    }

    /* Mobile navigation backdrop */
    .mobile-nav-backdrop {
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
        bottom: 0;
        background: rgba(0, 0, 0, 0.4);
        backdrop-filter: blur(2px);
        z-index: 999;
        opacity: 0;
        visibility: hidden;
        transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    }

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

    /* Mobile menu entrance animations */
    @keyframes slideInFromLeft {
        from {
            transform: translateX(-20px);
            opacity: 0;
        }
        to {
            transform: translateX(0);
            opacity: 1;
        }
    }

    .mobile-open .nav-link {
        animation: slideInFromLeft 0.3s ease-out;
        animation-fill-mode: both;
    }

    .mobile-open .nav-link:nth-child(1) {
        animation-delay: 0.1s;
    }
    .mobile-open .nav-link:nth-child(2) {
        animation-delay: 0.15s;
    }
    .mobile-open .nav-link:nth-child(3) {
        animation-delay: 0.2s;
    }
    .mobile-open .nav-link:nth-child(4) {
        animation-delay: 0.25s;
    }
    .mobile-open .nav-link:nth-child(5) {
        animation-delay: 0.3s;
    }
}

/* Touch Device Optimizations */
.touch-device * {
    cursor: default !important;
}

.touch-device .btn,
.touch-device button,
.touch-device [role="button"],
.touch-device .nav-link,
.touch-device .card:hover {
    transition:
        transform 0.1s ease,
        background-color 0.2s ease,
        box-shadow 0.1s ease;
}

.touch-device .btn:active,
.touch-device button:active,
.touch-device [role="button"]:active {
    transform: scale(0.98);
    background-color: rgba(0, 0, 0, 0.05);
}

.touch-device .nav-link:active {
    background-color: rgba(255, 255, 255, 0.15);
    transform: scale(0.98);
}

/* Remove hover effects on touch devices */
.touch-device .card:hover {
    transform: none;
    box-shadow: var(--shadow-sm);
}

.touch-device .btn:hover,
.touch-device button:hover {
    background-color: inherit;
    transform: none;
}

/* Ensure proper scrolling on touch devices */
.touch-device .modal-content,
.touch-device .sidebar,
.touch-device .project-tree {
    -webkit-overflow-scrolling: touch;
}

/* Mobile menu animations */
@keyframes slideInRight {
    from {
        transform: translateX(100%);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

@keyframes slideOutRight {
    from {
        transform: translateX(0);
        opacity: 1;
    }
    to {
        transform: translateX(100%);
        opacity: 0;
    }
}

.mobile-nav-enter {
    animation: slideInRight 0.3s ease-out;
}

.mobile-nav-exit {
    animation: slideOutRight 0.3s ease-in;
}

/* High contrast mode optimizations */
@media (prefers-contrast: high) {
    .btn,
    .nav-link,
    .card {
        border: 2px solid;
        font-weight: 600;
    }

    /* User menu adjustments for mobile */
    .user-dropdown-menu {
        right: var(--spacing-sm);
        min-width: calc(100vw - 2rem);
        max-width: 320px;
    }

    .user-name {
        display: none;
    }

    .user-menu-trigger {
        padding: var(--spacing-sm);
    }
}

/* Reduced motion preferences */
@media (prefers-reduced-motion: reduce) {
    .touch-device .btn:active,
    .touch-device button:active,
    .touch-device [role="button"]:active,
    .touch-device .nav-link:active {
        transform: none;
        transition: none;
    }

    .mobile-nav-enter,
    .mobile-nav-exit {
        animation: none;
    }
}

/* Print Styles */
@media print {
    .sidebar,
    .app-header,
    .btn,
    .modal-backdrop,
    .modal {
        display: none !important;
    }

    .app-main {
        display: block;
    }

    .card {
        box-shadow: none;
        border: var(--border-width-thin) solid var(--border-color);
    }
}