/**
 * All Together Now - Main Stylesheet
 */

/* =====================================================
   CSS VARIABLES
   ===================================================== */
:root {
    /* Colors */
    --color-primary: #4F46E5;
    --color-primary-dark: #4338CA;
    --color-primary-light: #818CF8;

    --color-secondary: #10B981;
    --color-secondary-dark: #059669;

    --color-accent: #F59E0B;

    --color-text: #1F2937;
    --color-text-light: #6B7280;
    --color-text-muted: #9CA3AF;

    --color-bg: #FFFFFF;
    --color-bg-alt: #F9FAFB;
    --color-bg-dark: #111827;

    --color-border: #E5E7EB;
    --color-border-dark: #D1D5DB;

    --color-success: #10B981;
    --color-warning: #F59E0B;
    --color-error: #EF4444;
    --color-info: #3B82F6;

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

    --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;
    --font-size-3xl: 1.875rem;
    --font-size-4xl: 2.25rem;
    --font-size-5xl: 3rem;

    /* Spacing */
    --space-1: 0.25rem;
    --space-2: 0.5rem;
    --space-3: 0.75rem;
    --space-4: 1rem;
    --space-5: 1.25rem;
    --space-6: 1.5rem;
    --space-8: 2rem;
    --space-10: 2.5rem;
    --space-12: 3rem;
    --space-16: 4rem;
    --space-20: 5rem;

    /* Borders */
    --radius-sm: 0.25rem;
    --radius-md: 0.375rem;
    --radius-lg: 0.5rem;
    --radius-xl: 0.75rem;
    --radius-2xl: 1rem;
    --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);

    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 200ms ease;
    --transition-slow: 300ms ease;

    /* Layout */
    --container-max: 1200px;
    --container-narrow: 800px;
    --header-height: 72px;
}

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

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    margin: 0;
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    line-height: 1.6;
    color: var(--color-text);
    background-color: var(--color-bg);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

h1, h2, h3, h4, h5, h6 {
    margin: 0 0 var(--space-4);
    font-weight: 600;
    line-height: 1.3;
}

h1 { font-size: var(--font-size-4xl); }
h2 { font-size: var(--font-size-3xl); }
h3 { font-size: var(--font-size-2xl); }
h4 { font-size: var(--font-size-xl); }
h5 { font-size: var(--font-size-lg); }
h6 { font-size: var(--font-size-base); }

p {
    margin: 0 0 var(--space-4);
}

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

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

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

ul, ol {
    margin: 0 0 var(--space-4);
    padding-left: var(--space-6);
}

hr {
    border: none;
    border-top: 1px solid var(--color-border);
    margin: var(--space-6) 0;
}

/* =====================================================
   LAYOUT
   ===================================================== */
.container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--space-4);
}

.container--narrow {
    max-width: var(--container-narrow);
}

.main-content {
    min-height: calc(100vh - var(--header-height) - 200px);
}

/* =====================================================
   HEADER
   ===================================================== */
.site-header {
    position: sticky;
    top: 0;
    z-index: 100;
    height: var(--header-height);
    background: var(--color-bg);
    border-bottom: 1px solid var(--color-border);
}

.site-header .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 100%;
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    font-weight: 700;
    font-size: var(--font-size-lg);
    color: var(--color-text);
}

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

.logo__icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background: var(--color-primary);
    color: white;
    border-radius: var(--radius-lg);
    font-size: var(--font-size-sm);
    font-weight: 800;
}

.main-nav {
    display: flex;
    gap: var(--space-6);
}

.nav-link {
    color: var(--color-text-light);
    font-weight: 500;
    transition: color var(--transition-fast);
}

.nav-link:hover,
.nav-link.active {
    color: var(--color-primary);
}

.header-actions {
    display: flex;
    align-items: center;
    gap: var(--space-3);
}

/* User Menu */
.user-menu {
    position: relative;
}

.user-menu__toggle {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-1);
    background: none;
    border: none;
    cursor: pointer;
}

.user-avatar {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    background: var(--color-primary);
    color: white;
    border-radius: var(--radius-full);
    font-weight: 600;
    font-size: var(--font-size-sm);
}

.user-menu__dropdown {
    position: absolute;
    top: 100%;
    right: 0;
    min-width: 200px;
    margin-top: var(--space-2);
    padding: var(--space-2);
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all var(--transition-base);
}

.user-menu__toggle[aria-expanded="true"] + .user-menu__dropdown {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.user-menu__info {
    padding: var(--space-3);
    border-bottom: 1px solid var(--color-border);
    margin-bottom: var(--space-2);
}

.user-menu__info strong {
    display: block;
    margin-bottom: var(--space-1);
}

.user-menu__dropdown a {
    display: block;
    padding: var(--space-2) var(--space-3);
    color: var(--color-text);
    border-radius: var(--radius-md);
}

.user-menu__dropdown a:hover {
    background: var(--color-bg-alt);
}

.user-menu__dropdown hr {
    margin: var(--space-2) 0;
}

.user-menu__admin {
    color: var(--color-primary) !important;
    font-weight: 600;
}

.user-menu__admin:hover {
    background: var(--color-primary-light) !important;
}

/* Mobile Menu */
.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    padding: var(--space-2);
    background: none;
    border: none;
    cursor: pointer;
}

.mobile-menu-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--color-text);
    transition: var(--transition-base);
}

@media (max-width: 768px) {
    .main-nav,
    .header-actions {
        display: none;
    }

    .mobile-menu-toggle {
        display: flex;
    }

    body.menu-open .main-nav {
        display: flex;
        flex-direction: column;
        position: absolute;
        top: var(--header-height);
        left: 0;
        right: 0;
        padding: var(--space-4);
        background: var(--color-bg);
        border-bottom: 1px solid var(--color-border);
    }

    body.menu-open .header-actions {
        display: flex;
        flex-direction: column;
        position: absolute;
        top: calc(var(--header-height) + 200px);
        left: 0;
        right: 0;
        padding: var(--space-4);
        background: var(--color-bg);
        border-bottom: 1px solid var(--color-border);
    }
}

/* =====================================================
   FOOTER
   ===================================================== */
.site-footer {
    background: var(--color-bg-dark);
    color: white;
    padding: var(--space-16) 0 var(--space-8);
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: var(--space-8);
    margin-bottom: var(--space-12);
}

.footer-brand p {
    color: var(--color-text-muted);
    margin-top: var(--space-4);
}

.footer-brand .logo {
    color: white;
}

.footer-brand .logo__icon {
    background: var(--color-primary-light);
}

.footer-links h4 {
    color: white;
    font-size: var(--font-size-sm);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: var(--space-4);
}

.footer-links a {
    display: block;
    color: var(--color-text-muted);
    padding: var(--space-1) 0;
}

.footer-links a:hover {
    color: white;
}

.footer-bottom {
    padding-top: var(--space-8);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    text-align: center;
    color: var(--color-text-muted);
    font-size: var(--font-size-sm);
}

@media (max-width: 768px) {
    .footer-grid {
        grid-template-columns: 1fr 1fr;
    }

    .footer-brand {
        grid-column: 1 / -1;
    }
}

@media (max-width: 480px) {
    .footer-grid {
        grid-template-columns: 1fr;
    }
}

/* =====================================================
   BUTTONS
   ===================================================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    padding: var(--space-3) var(--space-5);
    font-size: var(--font-size-base);
    font-weight: 500;
    line-height: 1;
    text-align: center;
    white-space: nowrap;
    border: 2px solid transparent;
    border-radius: var(--radius-lg);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

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

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

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

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

.btn--ghost {
    background: transparent;
    color: var(--color-text);
}

.btn--ghost:hover:not(:disabled) {
    background: var(--color-bg-alt);
    color: var(--color-text);
}

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

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

.btn--lg {
    padding: var(--space-4) var(--space-8);
    font-size: var(--font-size-lg);
}

.btn--sm {
    padding: var(--space-2) var(--space-3);
    font-size: var(--font-size-sm);
}

.btn--icon {
    padding: var(--space-2);
}

.btn--block {
    display: flex;
    width: 100%;
}

/* =====================================================
   FORMS
   ===================================================== */
.form-group {
    margin-bottom: var(--space-5);
}

.form-label {
    display: block;
    margin-bottom: var(--space-2);
    font-weight: 500;
    color: var(--color-text);
}

.form-label--required::after {
    content: ' *';
    color: var(--color-error);
}

.form-input,
.form-select,
.form-textarea {
    display: block;
    width: 100%;
    padding: var(--space-3) var(--space-4);
    font-size: var(--font-size-base);
    font-family: inherit;
    color: var(--color-text);
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.1);
}

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

.form-input--error {
    border-color: var(--color-error);
}

.form-textarea {
    resize: vertical;
    min-height: 120px;
}

.form-help {
    margin-top: var(--space-1);
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
}

.form-error {
    margin-top: var(--space-1);
    font-size: var(--font-size-sm);
    color: var(--color-error);
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-4);
}

@media (max-width: 480px) {
    .form-row {
        grid-template-columns: 1fr;
    }
}

/* Checkbox & Radio */
.form-check {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    cursor: pointer;
}

.form-check input {
    width: 18px;
    height: 18px;
    accent-color: var(--color-primary);
}

/* Toggle Switch */
.toggle {
    position: relative;
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    cursor: pointer;
}

.toggle__input {
    position: absolute;
    opacity: 0;
}

.toggle__slider {
    position: relative;
    width: 44px;
    height: 24px;
    background: var(--color-border-dark);
    border-radius: var(--radius-full);
    transition: var(--transition-fast);
}

.toggle__slider::before {
    content: '';
    position: absolute;
    top: 2px;
    left: 2px;
    width: 20px;
    height: 20px;
    background: white;
    border-radius: var(--radius-full);
    transition: var(--transition-fast);
}

.toggle__input:checked + .toggle__slider {
    background: var(--color-primary);
}

.toggle__input:checked + .toggle__slider::before {
    transform: translateX(20px);
}

/* =====================================================
   CARDS
   ===================================================== */
.card {
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
    padding: var(--space-6);
}

.card--hover:hover {
    border-color: var(--color-primary);
    box-shadow: var(--shadow-md);
}

.card__header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--space-4);
}

.card__title {
    margin: 0;
    font-size: var(--font-size-lg);
}

.card__footer {
    margin-top: var(--space-4);
    padding-top: var(--space-4);
    border-top: 1px solid var(--color-border);
}

/* =====================================================
   BADGES & TAGS
   ===================================================== */
.badge {
    display: inline-flex;
    align-items: center;
    padding: var(--space-1) var(--space-2);
    font-size: var(--font-size-xs);
    font-weight: 600;
    text-transform: uppercase;
    border-radius: var(--radius-md);
    background: var(--color-bg-alt);
    color: var(--color-text-light);
}

.badge--primary {
    background: rgba(79, 70, 229, 0.1);
    color: var(--color-primary);
}

.badge--success {
    background: rgba(16, 185, 129, 0.1);
    color: var(--color-success);
}

.badge--warning {
    background: rgba(245, 158, 11, 0.1);
    color: var(--color-warning);
}

.badge--error {
    background: rgba(239, 68, 68, 0.1);
    color: var(--color-error);
}

.plan-badge {
    display: inline-flex;
    padding: var(--space-1) var(--space-2);
    font-size: var(--font-size-xs);
    font-weight: 600;
    border-radius: var(--radius-md);
}

.plan-badge--free {
    background: var(--color-bg-alt);
    color: var(--color-text-light);
}

.plan-badge--pro {
    background: linear-gradient(135deg, var(--color-accent), #F97316);
    color: white;
}

/* =====================================================
   ALERTS & MESSAGES
   ===================================================== */
.alert {
    padding: var(--space-4);
    border-radius: var(--radius-lg);
    margin-bottom: var(--space-4);
}

.alert--info {
    background: rgba(59, 130, 246, 0.1);
    border: 1px solid rgba(59, 130, 246, 0.2);
    color: var(--color-info);
}

.alert--success {
    background: rgba(16, 185, 129, 0.1);
    border: 1px solid rgba(16, 185, 129, 0.2);
    color: var(--color-success);
}

.alert--warning {
    background: rgba(245, 158, 11, 0.1);
    border: 1px solid rgba(245, 158, 11, 0.2);
    color: var(--color-warning);
}

.alert--error {
    background: rgba(239, 68, 68, 0.1);
    border: 1px solid rgba(239, 68, 68, 0.2);
    color: var(--color-error);
}

.message-box {
    text-align: center;
    padding: var(--space-12) var(--space-8);
}

.message-box h1 {
    margin-bottom: var(--space-4);
}

.message-box p {
    color: var(--color-text-light);
    margin-bottom: var(--space-6);
}

/* Toast Notifications */
.toast-container {
    position: fixed;
    bottom: var(--space-4);
    right: var(--space-4);
    z-index: 1000;
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
}

.toast {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    padding: var(--space-4);
    background: var(--color-bg);
    color: var(--color-text);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    animation: slideIn var(--transition-base) ease;
}

.toast--success {
    border-left: 4px solid var(--color-success);
}

.toast--error {
    border-left: 4px solid var(--color-error);
}

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

/* =====================================================
   MODALS
   ===================================================== */
.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 200;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-base);
}

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

.modal {
    width: 100%;
    max-width: 500px;
    max-height: 90vh;
    margin: var(--space-4);
    background: var(--color-bg);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-xl);
    overflow: hidden;
    transform: scale(0.95);
    transition: transform var(--transition-base);
}

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

.modal__header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-4) var(--space-6);
    border-bottom: 1px solid var(--color-border);
}

.modal__title {
    margin: 0;
    font-size: var(--font-size-xl);
}

.modal__close {
    padding: var(--space-1);
    background: none;
    border: none;
    font-size: var(--font-size-xl);
    cursor: pointer;
    opacity: 0.5;
}

.modal__close:hover {
    opacity: 1;
}

.modal__body {
    padding: var(--space-6);
    overflow-y: auto;
}

.modal__footer {
    display: flex;
    justify-content: flex-end;
    gap: var(--space-3);
    padding: var(--space-4) var(--space-6);
    border-top: 1px solid var(--color-border);
}

/* =====================================================
   LOADING STATES
   ===================================================== */
.spinner {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 2px solid var(--color-border);
    border-top-color: var(--color-primary);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

.spinner--lg {
    width: 40px;
    height: 40px;
    border-width: 3px;
}

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

.loading-overlay {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(255, 255, 255, 0.8);
    z-index: 10;
}

.skeleton {
    background: linear-gradient(90deg, var(--color-bg-alt) 25%, var(--color-border) 50%, var(--color-bg-alt) 75%);
    background-size: 200% 100%;
    animation: shimmer 1.5s infinite;
    border-radius: var(--radius-md);
}

@keyframes shimmer {
    0% { background-position: 200% 0; }
    100% { background-position: -200% 0; }
}

/* =====================================================
   TABS
   ===================================================== */
.tabs {
    border-bottom: 1px solid var(--color-border);
    margin-bottom: var(--space-6);
}

.tabs__list {
    display: flex;
    gap: var(--space-1);
    margin: 0;
    padding: 0;
    list-style: none;
}

.tabs__tab {
    padding: var(--space-3) var(--space-4);
    color: var(--color-text-light);
    font-weight: 500;
    border-bottom: 2px solid transparent;
    margin-bottom: -1px;
    cursor: pointer;
    transition: all var(--transition-fast);
}

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

.tabs__tab.active {
    color: var(--color-primary);
    border-bottom-color: var(--color-primary);
}

.tabs__content {
    display: none;
}

.tabs__content.active {
    display: block;
}

/* =====================================================
   PROGRESS
   ===================================================== */
.progress {
    height: 8px;
    background: var(--color-bg-alt);
    border-radius: var(--radius-full);
    overflow: hidden;
}

.progress__bar {
    height: 100%;
    background: var(--color-primary);
    border-radius: var(--radius-full);
    transition: width var(--transition-slow);
}

.progress--success .progress__bar {
    background: var(--color-success);
}

/* =====================================================
   EMPTY STATES
   ===================================================== */
.empty-state {
    text-align: center;
    padding: var(--space-12) var(--space-4);
}

.empty-state__icon {
    font-size: 64px;
    margin-bottom: var(--space-4);
    opacity: 0.3;
}

.empty-state__title {
    margin-bottom: var(--space-2);
    color: var(--color-text);
}

.empty-state__text {
    color: var(--color-text-muted);
    margin-bottom: var(--space-6);
}

/* =====================================================
   UTILITIES
   ===================================================== */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.text-muted { color: var(--color-text-muted); }
.text-light { color: var(--color-text-light); }
.text-success { color: var(--color-success); }
.text-error { color: var(--color-error); }
.text-warning { color: var(--color-warning); }

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

.font-bold { font-weight: 700; }
.font-medium { font-weight: 500; }

.mt-0 { margin-top: 0; }
.mt-4 { margin-top: var(--space-4); }
.mt-8 { margin-top: var(--space-8); }
.mb-0 { margin-bottom: 0; }
.mb-4 { margin-bottom: var(--space-4); }
.mb-8 { margin-bottom: var(--space-8); }

.flex { display: flex; }
.flex-col { flex-direction: column; }
.items-center { align-items: center; }
.justify-center { justify-content: center; }
.justify-between { justify-content: space-between; }
.gap-2 { gap: var(--space-2); }
.gap-4 { gap: var(--space-4); }

.grid { display: grid; }
.grid-cols-2 { grid-template-columns: repeat(2, 1fr); }
.grid-cols-3 { grid-template-columns: repeat(3, 1fr); }

.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: 0;
}