/* ========================================
   CSS CUSTOM PROPERTIES (Design System)
   ======================================== */
:root {
    /* Colors - Primary Palette */
    --color-primary-blue: #5B9BD5;
    --color-primary-pink: #FF7B9C;
    --color-primary-purple: #9B7EBD;
    --color-primary-coral: #eb856a;
    --color-primary-indigo: #6379ed;

    /* Colors - Neutrals */
    --color-dark: #1C1C28;
    --color-dark-purple: #2C2847;
    --color-dark-light: #3A3A52;
    --color-gray-dark: #6B7280;
    --color-gray: #9CA3AF;
    --color-gray-light: #D1D5DB;
    --color-gray-lighter: #E5E7EB;
    --color-gray-lightest: #F3F4F6;
    --color-white: #FFFFFF;

    /* Colors - Semantic */
    --color-success: #10B981;
    --color-warning: #F59E0B;
    --color-error: #EF4444;
    --color-info: #3B82F6;

    /* Colors - Status */
    --color-status-ready: #10B981;
    --color-status-draft: #F59E0B;
    --color-status-queued: #3B82F6;

    /* Typography */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-size-xs: 0.75rem;
    /* 12px */
    --font-size-sm: 0.875rem;
    /* 14px */
    --font-size-base: 1rem;
    /* 16px */
    --font-size-lg: 1.125rem;
    /* 18px */
    --font-size-xl: 1.25rem;
    /* 20px */
    --font-size-2xl: 1.5rem;
    /* 24px */
    --font-size-3xl: 1.875rem;
    /* 30px */
    --font-size-4xl: 2.25rem;
    /* 36px */

    --font-weight-light: 300;
    --font-weight-normal: 400;
    --font-weight-medium: 500;
    --font-weight-semibold: 600;
    --font-weight-bold: 700;

    /* Spacing */
    --spacing-xs: 0.25rem;
    /* 4px */
    --spacing-sm: 0.5rem;
    /* 8px */
    --spacing-md: 1rem;
    /* 16px */
    --spacing-lg: 1.5rem;
    /* 24px */
    --spacing-xl: 2rem;
    /* 32px */
    --spacing-2xl: 3rem;
    /* 48px */
    --spacing-3xl: 4rem;
    /* 64px */

    /* Border Radius */
    --radius-sm: 0.25rem;
    /* 4px */
    --radius-md: 0.5rem;
    /* 8px */
    --radius-lg: 0.75rem;
    /* 12px */
    --radius-xl: 1rem;
    /* 16px */
    --radius-full: 9999px;

    /* 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), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);

    /* Layout */
    --sidebar-width: 240px;
    --sidebar-collapsed-width: 70px;
    --header-height: 70px;

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

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

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

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

body {
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-normal);
    line-height: 1.5;
    color: var(--color-dark);
    background-color: var(--color-gray-lightest);
    overflow-x: hidden;
}

h1,
h2,
h3,
h4,
h5,
h6 {
    font-weight: var(--font-weight-semibold);
    line-height: 1.2;
    margin-bottom: var(--spacing-md);
}

h1 {
    font-size: var(--font-size-3xl);
}

h2 {
    font-size: var(--font-size-2xl);
}

h3 {
    font-size: var(--font-size-xl);
}

h4 {
    font-size: var(--font-size-lg);
}

h5 {
    font-size: var(--font-size-base);
}

h6 {
    font-size: var(--font-size-sm);
}

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

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

a:hover {
    color: var(--color-primary-blue);
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

button {
    font-family: inherit;
    cursor: pointer;
    border: none;
    background: none;
}

input,
textarea,
select {
    font-family: inherit;
    font-size: inherit;
}

/* ========================================
   UTILITY CLASSES
   ======================================== */
.hidden {
    display: none !important;
}

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border-width: 0;
}

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

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

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

.text-xs {
    font-size: var(--font-size-xs);
}

.text-sm {
    font-size: var(--font-size-sm);
}

.text-base {
    font-size: var(--font-size-base);
}

.text-lg {
    font-size: var(--font-size-lg);
}

.text-xl {
    font-size: var(--font-size-xl);
}

.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-semibold {
    font-weight: var(--font-weight-semibold);
}

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

.text-gray {
    color: var(--color-gray);
}

.text-gray-dark {
    color: var(--color-gray-dark);
}

.text-success {
    color: var(--color-success);
}

.text-warning {
    color: var(--color-warning);
}

.text-error {
    color: var(--color-error);
}

/* ========================================
   LAYOUT - APP CONTAINER
   ======================================== */
.app-container {
    display: flex;
    min-height: 100vh;
    background-color: var(--color-gray-lightest);
}

/* ========================================
   LAYOUT - SIDEBAR
   ======================================== */
.sidebar {
    width: var(--sidebar-width);
    background: linear-gradient(180deg, var(--color-dark-purple) 0%, var(--color-dark) 100%);
    color: var(--color-white);
    display: flex;
    flex-direction: column;
    position: fixed;
    left: 0;
    top: 0;
    height: 100vh;
    overflow-y: auto;
    transition: transform var(--transition-base);
    z-index: var(--z-fixed);
}

.sidebar-header {
    padding: var(--spacing-lg);
    display: flex;
    align-items: center;
    justify-content: space-between;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

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

.logo-text {
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-semibold);
}

.sidebar-toggle {
    display: none;
    color: var(--color-white);
    padding: var(--spacing-sm);
}

/* Sidebar Navigation */
.sidebar-nav {
    flex: 1;
    padding: var(--spacing-lg) 0;
}

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

.nav-section-title {
    font-size: var(--font-size-xs);
    font-weight: var(--font-weight-semibold);
    color: rgba(255, 255, 255, 0.5);
    padding: 0 var(--spacing-lg);
    margin-bottom: var(--spacing-md);
    display: block;
    letter-spacing: 0.05em;
}

.nav-link {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-md) var(--spacing-lg);
    color: rgba(255, 255, 255, 0.7);
    transition: all var(--transition-fast);
    position: relative;
}

.nav-link::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 3px;
    background: var(--color-primary-coral);
    transform: scaleY(0);
    transition: transform var(--transition-fast);
}

.nav-link:hover {
    background-color: rgba(255, 255, 255, 0.05);
    color: var(--color-white);
}

.nav-link.active {
    background-color: rgba(255, 255, 255, 0.1);
    color: var(--color-white);
}

.nav-link.active::before {
    transform: scaleY(1);
}

.nav-link svg {
    width: 20px;
    height: 20px;
    flex-shrink: 0;
}

/* Sidebar Footer */
.sidebar-footer {
    padding: var(--spacing-lg);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.upgrade-card {
    background: linear-gradient(135deg, rgba(235, 133, 106, 0.2) 0%, rgba(99, 121, 237, 0.2) 100%);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    text-align: center;
}

.upgrade-icon {
    font-size: var(--font-size-2xl);
    margin-bottom: var(--spacing-sm);
}

.upgrade-card h4 {
    font-size: var(--font-size-base);
    margin-bottom: var(--spacing-sm);
}

.upgrade-card p {
    font-size: var(--font-size-xs);
    color: rgba(255, 255, 255, 0.7);
    margin-bottom: var(--spacing-md);
}

.btn-upgrade {
    background: linear-gradient(135deg, var(--color-primary-coral) 0%, var(--color-primary-indigo) 100%);
    color: var(--color-white);
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-md);
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    width: 100%;
    transition: transform var(--transition-fast);
}

.btn-upgrade:hover {
    transform: translateY(-2px);
}

/* ========================================
   LAYOUT - MAIN CONTENT
   ======================================== */
.main-content {
    flex: 1;
    margin-left: var(--sidebar-width);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.page-header {
    background: var(--color-white);
    padding: var(--spacing-lg) var(--spacing-xl);
    display: flex;
    align-items: center;
    justify-content: space-between;
    border-bottom: 1px solid var(--color-gray-lighter);
    height: var(--header-height);
    position: sticky;
    top: 0;
    z-index: var(--z-sticky);
}

.page-title-section h1 {
    margin: 0;
    font-size: var(--font-size-2xl);
}

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

.notification-btn {
    position: relative;
    padding: var(--spacing-sm);
    color: var(--color-gray-dark);
    transition: color var(--transition-fast);
}

.notification-btn:hover {
    color: var(--color-dark);
}

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

.user-profile:hover {
    background-color: var(--color-gray-lightest);
}

.user-info {
    display: flex;
    flex-direction: column;
    align-items: flex-end;
}

.user-name {
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    color: var(--color-dark);
}

.user-role {
    font-size: var(--font-size-xs);
    color: var(--color-gray);
}

.user-avatar {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-full);
    overflow: hidden;
}

.user-avatar img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

/* View Container */
.view-container {
    flex: 1;
    padding: var(--spacing-xl);
}

/* ========================================
   RESPONSIVE DESIGN
   ======================================== */
@media (max-width: 768px) {
    .sidebar {
        transform: translateX(-100%);
    }

    .sidebar.open {
        transform: translateX(0);
    }

    .sidebar-toggle {
        display: block;
    }

    .main-content {
        margin-left: 0;
    }

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

    .view-container {
        padding: var(--spacing-lg);
    }

    .user-info {
        display: none;
    }
}

@media (max-width: 480px) {
    .page-header {
        padding: var(--spacing-md);
    }

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

/* Credits Badge */
.credits-badge {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    background: rgba(99, 121, 237, 0.1);
    border: 1px solid rgba(99, 121, 237, 0.2);
    border-radius: var(--radius-full);
    color: var(--color-primary-indigo);
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-semibold);
    cursor: pointer;
    transition: var(--transition-fast);
}

.credits-badge:hover {
    background: rgba(99, 121, 237, 0.15);
    border-color: var(--color-primary-indigo);
}

.credits-badge span {
    display: flex;
    align-items: center;
    gap: 0.25rem;
}

.credits-badge .credit-count {
    color: var(--color-dark);
}

/* Dropdown divider override */
.dropdown-divider {
    height: 1px;
    background: var(--color-gray-lighter);
    margin: 0.5rem 0;
}