/**
 * Plan.11town.com - Styles
 * 11town Brand System with Light/Dark Mode
 */

/* ============================================
   CSS Variables - Theme System
   ============================================ */

:root {
    /* Typography */
    --font-heading: 'Space Grotesk', -apple-system, sans-serif;
    --font-mono: 'JetBrains Mono', 'Fira Code', monospace;
    
    /* Accent Colors (constant across themes) */
    --pink: #FF1493;
    --pink-glow: rgba(255, 20, 147, 0.3);
    --cyan: #00C8FF;
    --cyan-glow: rgba(0, 200, 255, 0.3);
    
    /* Status Colors */
    --success: #10B981;
    --warning: #F59E0B;
    --error: #EF4444;
    
    /* Spacing */
    --space-xs: 4px;
    --space-sm: 8px;
    --space-md: 16px;
    --space-lg: 24px;
    --space-xl: 32px;
    --space-2xl: 48px;
    --space-3xl: 64px;
    
    /* Border Radius */
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 16px;
    --radius-full: 9999px;
    
    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-normal: 250ms ease;
    --transition-slow: 400ms ease;
}

/* Dark Theme (Default) */
[data-theme="dark"] {
    --bg-primary: #050505;
    --bg-secondary: #0a0a0a;
    --bg-tertiary: #111111;
    --bg-elevated: #1a1a1a;
    
    --border-subtle: rgba(255, 255, 255, 0.08);
    --border-default: rgba(255, 255, 255, 0.12);
    --border-strong: rgba(255, 255, 255, 0.2);
    
    --text-primary: #FFFFFF;
    --text-secondary: #888888;
    --text-muted: #555555;
    
    --card-bg: rgba(10, 10, 10, 0.8);
    --card-border: rgba(255, 255, 255, 0.1);
    
    --input-bg: rgba(255, 255, 255, 0.05);
    --input-border: rgba(255, 255, 255, 0.1);
    --input-focus: var(--cyan);
    
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.5);
    
    --overlay: rgba(0, 0, 0, 0.8);
}

/* Light Theme */
[data-theme="light"] {
    --bg-primary: #FAFAFA;
    --bg-secondary: #FFFFFF;
    --bg-tertiary: #F5F5F5;
    --bg-elevated: #FFFFFF;
    
    --border-subtle: rgba(0, 0, 0, 0.05);
    --border-default: rgba(0, 0, 0, 0.1);
    --border-strong: rgba(0, 0, 0, 0.2);
    
    --text-primary: #111111;
    --text-secondary: #555555;
    --text-muted: #888888;
    
    --card-bg: rgba(255, 255, 255, 0.9);
    --card-border: rgba(0, 0, 0, 0.1);
    
    --input-bg: rgba(0, 0, 0, 0.03);
    --input-border: rgba(0, 0, 0, 0.15);
    --input-focus: var(--pink);
    
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.08);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.15);
    
    --overlay: rgba(255, 255, 255, 0.9);
}

/* ============================================
   Base Styles
   ============================================ */

*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

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

body {
    font-family: var(--font-heading);
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
    transition: background-color var(--transition-normal), color var(--transition-normal);
}

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

a:hover {
    color: var(--pink);
}

/* ============================================
   Typography
   ============================================ */

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    font-weight: 600;
    line-height: 1.2;
    letter-spacing: -0.02em;
}

h1 { font-size: 2.5rem; }
h2 { font-size: 2rem; }
h3 { font-size: 1.5rem; }
h4 { font-size: 1.25rem; }

.mono {
    font-family: var(--font-mono);
    font-size: 0.875rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.subtitle {
    color: var(--text-secondary);
    font-size: 1rem;
    margin-top: var(--space-sm);
}

/* ============================================
   Logo
   ============================================ */

.logo {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    text-decoration: none;
}

.logo-mark {
    font-family: var(--font-mono);
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--cyan);
    letter-spacing: -3px;
}

.logo-text {
    font-family: var(--font-mono);
    font-size: 0.875rem;
    color: var(--text-secondary);
}

/* ============================================
   Buttons
   ============================================ */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
    padding: var(--space-md) var(--space-lg);
    font-family: var(--font-heading);
    font-size: 0.9375rem;
    font-weight: 600;
    border: none;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all var(--transition-fast);
    text-decoration: none;
}

.btn-primary {
    background: var(--pink);
    color: #FFFFFF;
    box-shadow: 0 0 20px var(--pink-glow);
}

.btn-primary:hover {
    background: #FF3AA8;
    box-shadow: 0 0 30px var(--pink-glow);
    transform: translateY(-1px);
    color: #FFFFFF;
}

.btn-secondary {
    background: transparent;
    color: var(--cyan);
    border: 1px solid var(--cyan);
}

.btn-secondary:hover {
    background: rgba(0, 200, 255, 0.1);
    box-shadow: 0 0 20px var(--cyan-glow);
    color: var(--cyan);
}

.btn-ghost {
    background: var(--input-bg);
    color: var(--text-primary);
    border: 1px solid var(--border-default);
}

.btn-ghost:hover {
    background: var(--bg-elevated);
    border-color: var(--border-strong);
}

.btn-full {
    width: 100%;
}

.btn-sm {
    padding: var(--space-sm) var(--space-md);
    font-size: 0.875rem;
}

.btn-lg {
    padding: var(--space-lg) var(--space-xl);
    font-size: 1rem;
}

/* ============================================
   Forms
   ============================================ */

.form-group {
    margin-bottom: var(--space-lg);
}

.form-group label {
    display: block;
    margin-bottom: var(--space-sm);
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-secondary);
}

input[type="text"],
input[type="email"],
input[type="password"],
input[type="date"],
input[type="number"],
textarea,
select {
    width: 100%;
    padding: var(--space-md);
    font-family: var(--font-heading);
    font-size: 1rem;
    color: var(--text-primary);
    background: var(--input-bg);
    border: 1px solid var(--input-border);
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
}

input:focus,
textarea:focus,
select:focus {
    outline: none;
    border-color: var(--input-focus);
    box-shadow: 0 0 0 3px rgba(0, 200, 255, 0.15);
}

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

textarea {
    min-height: 100px;
    resize: vertical;
}

/* ============================================
   Alerts
   ============================================ */

.alert {
    display: flex;
    align-items: flex-start;
    gap: var(--space-md);
    padding: var(--space-md);
    border-radius: var(--radius-sm);
    margin-bottom: var(--space-lg);
    font-size: 0.9375rem;
}

.alert-icon {
    flex-shrink: 0;
    width: 20px;
    text-align: center;
}

.alert-error {
    background: rgba(239, 68, 68, 0.1);
    border: 1px solid rgba(239, 68, 68, 0.3);
    color: #EF4444;
}

.alert-success {
    background: rgba(16, 185, 129, 0.1);
    border: 1px solid rgba(16, 185, 129, 0.3);
    color: #10B981;
}

.alert-info {
    background: rgba(0, 200, 255, 0.1);
    border: 1px solid rgba(0, 200, 255, 0.3);
    color: var(--cyan);
}

.alert-warning {
    background: rgba(245, 158, 11, 0.1);
    border: 1px solid rgba(245, 158, 11, 0.3);
    color: #F59E0B;
}

/* ============================================
   Cards
   ============================================ */

.card {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: var(--radius-lg);
    padding: var(--space-xl);
    transition: all var(--transition-normal);
}

.card:hover {
    border-color: var(--border-strong);
}

.card-glow {
    box-shadow: 0 0 40px var(--pink-glow);
}

.card-glow-cyan {
    box-shadow: 0 0 40px var(--cyan-glow);
}

/* ============================================
   Auth Pages
   ============================================ */

.auth-container {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-xl);
    background: var(--bg-primary);
    position: relative;
}

.auth-card {
    width: 100%;
    max-width: 420px;
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: var(--radius-lg);
    padding: var(--space-2xl);
    backdrop-filter: blur(10px);
}

.auth-header {
    text-align: center;
    margin-bottom: var(--space-xl);
}

.auth-header h1 {
    margin-top: var(--space-lg);
    font-size: 1.75rem;
}

.auth-form {
    margin-top: var(--space-xl);
}

.auth-footer {
    margin-top: var(--space-xl);
    padding-top: var(--space-lg);
    border-top: 1px solid var(--border-subtle);
    text-align: center;
    color: var(--text-secondary);
    font-size: 0.9375rem;
}

/* ============================================
   Theme Toggle
   ============================================ */

.theme-toggle {
    position: fixed;
    bottom: var(--space-xl);
    right: var(--space-xl);
    width: 48px;
    height: 48px;
    border-radius: var(--radius-full);
    background: var(--bg-elevated);
    border: 1px solid var(--border-default);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-fast);
    z-index: 100;
}

.theme-toggle:hover {
    border-color: var(--cyan);
    box-shadow: 0 0 20px var(--cyan-glow);
}

.theme-icon {
    font-size: 1.25rem;
    color: var(--text-primary);
}

/* ============================================
   Navigation
   ============================================ */

.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    padding: var(--space-md) var(--space-xl);
    background: rgba(5, 5, 5, 0.9);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-subtle);
}

[data-theme="light"] .nav {
    background: rgba(255, 255, 255, 0.9);
}

.nav-inner {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: var(--space-lg);
}

.nav-link {
    font-size: 0.9375rem;
    color: var(--text-secondary);
    transition: color var(--transition-fast);
}

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

/* ============================================
   Landing Page
   ============================================ */

.hero {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: var(--space-3xl) var(--space-xl);
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, var(--pink-glow) 0%, transparent 70%);
    opacity: 0.3;
    pointer-events: none;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-sm) var(--space-md);
    background: var(--input-bg);
    border: 1px solid var(--border-default);
    border-radius: var(--radius-full);
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--cyan);
    text-transform: uppercase;
    margin-bottom: var(--space-xl);
}

.hero h1 {
    font-size: clamp(2.5rem, 8vw, 4rem);
    max-width: 800px;
    margin-bottom: var(--space-lg);
}

.hero h1 span {
    color: var(--pink);
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin-bottom: var(--space-2xl);
}

.hero-buttons {
    display: flex;
    gap: var(--space-md);
    flex-wrap: wrap;
    justify-content: center;
}

/* Features Section */
.features {
    padding: var(--space-3xl) var(--space-xl);
    background: var(--bg-secondary);
}

.features-inner {
    max-width: 1000px;
    margin: 0 auto;
}

.features h2 {
    text-align: center;
    margin-bottom: var(--space-2xl);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--space-xl);
}

.feature-card {
    padding: var(--space-xl);
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: var(--radius-md);
}

.feature-icon {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--input-bg);
    border: 1px solid var(--border-default);
    border-radius: var(--radius-sm);
    margin-bottom: var(--space-md);
    font-size: 1.5rem;
}

.feature-card h3 {
    margin-bottom: var(--space-sm);
    font-size: 1.125rem;
}

.feature-card p {
    color: var(--text-secondary);
    font-size: 0.9375rem;
}

/* How It Works */
.how-it-works {
    padding: var(--space-3xl) var(--space-xl);
}

.how-it-works-inner {
    max-width: 800px;
    margin: 0 auto;
}

.how-it-works h2 {
    text-align: center;
    margin-bottom: var(--space-2xl);
}

.steps {
    display: flex;
    flex-direction: column;
    gap: var(--space-xl);
}

.step {
    display: flex;
    gap: var(--space-lg);
    align-items: flex-start;
}

.step-number {
    flex-shrink: 0;
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--pink);
    color: white;
    font-family: var(--font-mono);
    font-weight: 700;
    font-size: 1.25rem;
    border-radius: var(--radius-full);
}

.step-content h3 {
    margin-bottom: var(--space-xs);
}

.step-content p {
    color: var(--text-secondary);
}

/* Footer */
.footer {
    padding: var(--space-xl);
    border-top: 1px solid var(--border-subtle);
    text-align: center;
}

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

/* ============================================
   Dashboard
   ============================================ */

.dashboard {
    padding-top: 80px;
    min-height: 100vh;
}

.dashboard-header {
    padding: var(--space-xl);
    border-bottom: 1px solid var(--border-subtle);
}

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

.dashboard-title h1 {
    font-size: 1.5rem;
}

.dashboard-title p {
    color: var(--text-secondary);
    font-size: 0.9375rem;
}

.dashboard-content {
    padding: var(--space-xl);
    max-width: 1200px;
    margin: 0 auto;
}

.groups-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: var(--space-lg);
}

.group-card {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: var(--radius-md);
    padding: var(--space-xl);
    transition: all var(--transition-fast);
    cursor: pointer;
    text-decoration: none;
    display: block;
    color: inherit;
}

.group-card:hover {
    border-color: var(--pink);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.group-card-header {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    margin-bottom: var(--space-md);
}

.group-card h3 {
    font-size: 1.125rem;
    color: var(--text-primary);
}

.group-card-badge {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    padding: var(--space-xs) var(--space-sm);
    background: var(--input-bg);
    border-radius: var(--radius-sm);
    color: var(--cyan);
}

.group-card-meta {
    display: flex;
    gap: var(--space-lg);
    color: var(--text-secondary);
    font-size: 0.875rem;
}

.group-card-stat {
    display: flex;
    align-items: center;
    gap: var(--space-xs);
}

/* Empty State */
.empty-state {
    text-align: center;
    padding: var(--space-3xl);
    color: var(--text-secondary);
}

.empty-state-icon {
    font-size: 4rem;
    margin-bottom: var(--space-lg);
    opacity: 0.5;
}

.empty-state h3 {
    color: var(--text-primary);
    margin-bottom: var(--space-sm);
}

.empty-state p {
    margin-bottom: var(--space-xl);
}

/* ============================================
   Group View / Calendar
   ============================================ */

.group-view {
    padding-top: 80px;
    min-height: 100vh;
}

.group-header {
    padding: var(--space-xl);
    border-bottom: 1px solid var(--border-subtle);
    background: var(--bg-secondary);
}

.group-header-inner {
    max-width: 1200px;
    margin: 0 auto;
}

.group-header h1 {
    font-size: 1.75rem;
    margin-bottom: var(--space-sm);
}

.invite-link {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    margin-top: var(--space-md);
    padding: var(--space-md);
    background: var(--input-bg);
    border: 1px solid var(--border-default);
    border-radius: var(--radius-sm);
}

.invite-link input {
    flex: 1;
    background: none;
    border: none;
    color: var(--cyan);
    font-family: var(--font-mono);
    font-size: 0.875rem;
}

.invite-link input:focus {
    box-shadow: none;
}

.group-content {
    display: grid;
    grid-template-columns: 1fr 360px;
    gap: var(--space-xl);
    padding: var(--space-xl);
    max-width: 1200px;
    margin: 0 auto;
}

@media (max-width: 900px) {
    .group-content {
        grid-template-columns: 1fr;
    }
}

/* Calendar */
.calendar {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: var(--radius-lg);
    padding: var(--space-xl);
}

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

.calendar-nav {
    display: flex;
    align-items: center;
    gap: var(--space-md);
}

.calendar-nav button {
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--input-bg);
    border: 1px solid var(--border-default);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.calendar-nav button:hover {
    border-color: var(--cyan);
    color: var(--cyan);
}

.calendar-title {
    font-size: 1.25rem;
    font-weight: 600;
}

.calendar-grid {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    gap: 4px;
}

.calendar-day-header {
    padding: var(--space-sm);
    text-align: center;
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--text-muted);
    text-transform: uppercase;
}

.calendar-day {
    aspect-ratio: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--input-bg);
    border: 1px solid transparent;
    border-radius: var(--radius-sm);
    cursor: pointer;
    font-size: 0.9375rem;
    transition: all var(--transition-fast);
    position: relative;
}

.calendar-day:hover {
    border-color: var(--border-strong);
}

.calendar-day.empty {
    background: none;
    cursor: default;
}

.calendar-day.selected {
    background: var(--pink);
    color: white;
    border-color: var(--pink);
}

.calendar-day.perfect {
    background: var(--success);
    color: white;
    border-color: var(--success);
}

.calendar-day.partial::after {
    content: '';
    position: absolute;
    bottom: 4px;
    left: 50%;
    transform: translateX(-50%);
    width: 6px;
    height: 6px;
    background: var(--cyan);
    border-radius: 50%;
}

.calendar-day.today {
    border-color: var(--cyan);
}

.calendar-day.disabled {
    opacity: 0.3;
    cursor: not-allowed;
}

/* Sidebar */
.sidebar {
    display: flex;
    flex-direction: column;
    gap: var(--space-lg);
}

.sidebar-card {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: var(--radius-lg);
    padding: var(--space-xl);
}

.sidebar-card h3 {
    font-size: 1rem;
    margin-bottom: var(--space-md);
    display: flex;
    align-items: center;
    gap: var(--space-sm);
}

/* Members List */
.members-list {
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
}

.member-item {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    padding: var(--space-sm) 0;
}

.member-avatar {
    width: 32px;
    height: 32px;
    border-radius: var(--radius-full);
    background: var(--input-bg);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.member-info {
    flex: 1;
}

.member-name {
    font-size: 0.9375rem;
    color: var(--text-primary);
}

.member-status {
    font-size: 0.75rem;
    color: var(--text-muted);
}

.member-badge {
    font-size: 0.75rem;
    padding: 2px 6px;
    border-radius: var(--radius-sm);
}

.member-badge.filled {
    background: rgba(16, 185, 129, 0.2);
    color: var(--success);
}

.member-badge.pending {
    background: rgba(245, 158, 11, 0.2);
    color: var(--warning);
}

/* Best Dates */
.best-dates {
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
}

.best-date {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-md);
    background: var(--input-bg);
    border-radius: var(--radius-sm);
}

.best-date.perfect {
    background: rgba(16, 185, 129, 0.15);
    border: 1px solid rgba(16, 185, 129, 0.3);
}

.best-date-info {
    display: flex;
    flex-direction: column;
}

.best-date-label {
    font-size: 0.9375rem;
    font-weight: 500;
}

.best-date-count {
    font-size: 0.75rem;
    color: var(--text-secondary);
}

.best-date-badge {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    padding: 2px 8px;
    background: var(--success);
    color: white;
    border-radius: var(--radius-sm);
}

/* ============================================
   Create Group Form
   ============================================ */

.create-form {
    max-width: 500px;
    margin: 0 auto;
    padding: var(--space-2xl);
}

.create-form h1 {
    margin-bottom: var(--space-xl);
}

.date-range-inputs {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-md);
}

/* ============================================
   Heatmap
   ============================================ */

.heatmap {
    overflow-x: auto;
}

.heatmap-grid {
    display: flex;
    flex-direction: column;
    gap: 2px;
    min-width: max-content;
}

.heatmap-row {
    display: flex;
    align-items: center;
    gap: 2px;
}

.heatmap-label {
    width: 100px;
    padding-right: var(--space-md);
    font-size: 0.875rem;
    color: var(--text-secondary);
    text-align: right;
    flex-shrink: 0;
}

.heatmap-cell {
    width: 28px;
    height: 28px;
    border-radius: 4px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.75rem;
}

.heatmap-cell.empty {
    background: var(--input-bg);
    color: var(--text-muted);
}

.heatmap-cell.available {
    background: var(--success);
    color: white;
}

.heatmap-cell.unavailable {
    background: var(--input-bg);
}

/* ============================================
   Utilities
   ============================================ */

.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-muted { color: var(--text-muted); }
.text-pink { color: var(--pink); }
.text-cyan { color: var(--cyan); }

.mt-sm { margin-top: var(--space-sm); }
.mt-md { margin-top: var(--space-md); }
.mt-lg { margin-top: var(--space-lg); }
.mt-xl { margin-top: var(--space-xl); }

.mb-sm { margin-bottom: var(--space-sm); }
.mb-md { margin-bottom: var(--space-md); }
.mb-lg { margin-bottom: var(--space-lg); }
.mb-xl { margin-bottom: var(--space-xl); }

.hidden { display: none; }

/* ============================================
   Loading States
   ============================================ */

.loading {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-2xl);
}

.spinner {
    width: 40px;
    height: 40px;
    border: 3px solid var(--border-default);
    border-top-color: var(--pink);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

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

/* ============================================
   Responsive
   ============================================ */

@media (max-width: 640px) {
    .hero h1 {
        font-size: 2rem;
    }
    
    .hero-buttons {
        flex-direction: column;
        width: 100%;
        max-width: 300px;
    }
    
    .hero-buttons .btn {
        width: 100%;
    }
    
    .auth-card {
        padding: var(--space-xl);
    }
    
    .nav {
        padding: var(--space-md);
    }
    
    .nav-links {
        gap: var(--space-md);
    }
    
    .dashboard-header-inner {
        flex-direction: column;
        align-items: flex-start;
    }
    
    .groups-grid {
        grid-template-columns: 1fr;
    }
    
    .calendar-day {
        font-size: 0.8125rem;
    }
    
    .invite-section {
        flex-direction: column;
    }
}

/* ============================================
   Invite Section (Code + URL)
   ============================================ */

.invite-section {
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
}

.invite-row {
    display: flex;
    align-items: center;
    gap: var(--space-md);
}

.invite-label {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--text-muted);
    text-transform: uppercase;
    width: 40px;
    flex-shrink: 0;
}

.invite-value {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    flex: 1;
}

.invite-input-code,
.invite-input-url {
    flex: 1;
    background: var(--input-bg);
    border: 1px solid var(--border-default);
    border-radius: var(--radius-sm);
    padding: var(--space-sm) var(--space-md);
    font-family: var(--font-mono);
    font-size: 0.875rem;
    color: var(--cyan);
}

.invite-input-code {
    max-width: 120px;
    text-align: center;
    letter-spacing: 1px;
}

/* ============================================
   Refresh Button
   ============================================ */

.refresh-btn {
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--input-bg);
    border: 1px solid var(--border-default);
    border-radius: var(--radius-sm);
    color: var(--text-secondary);
    cursor: pointer;
    transition: all var(--transition-fast);
    margin-left: var(--space-sm);
}

.refresh-btn:hover {
    border-color: var(--cyan);
    color: var(--cyan);
}

.refresh-btn.spinning svg {
    animation: spin 1s linear infinite;
}

/* ============================================
   Calendar Actions
   ============================================ */

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

.calendar-legend {
    margin-top: var(--space-lg);
    display: flex;
    gap: var(--space-lg);
    flex-wrap: wrap;
    font-size: 0.875rem;
    align-items: center;
}

.legend-item {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
}

.legend-color {
    width: 16px;
    height: 16px;
    border-radius: 4px;
}

.legend-partial {
    background: var(--input-bg);
    position: relative;
}

.legend-partial::after {
    content: '';
    position: absolute;
    bottom: 2px;
    left: 50%;
    transform: translateX(-50%);
    width: 4px;
    height: 4px;
    background: var(--cyan);
    border-radius: 50%;
}

/* ============================================
   User Dots on Calendar
   ============================================ */

.calendar-day {
    position: relative;
    flex-direction: column;
    padding: 4px;
}

.day-number {
    font-size: 0.9375rem;
    line-height: 1;
}

.user-dots {
    display: flex;
    flex-wrap: wrap;
    gap: 2px;
    justify-content: center;
    margin-top: 4px;
    max-width: 100%;
}

.user-dot {
    width: 14px;
    height: 14px;
    border-radius: 50%;
    font-size: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: 600;
    flex-shrink: 0;
    border: 1px solid rgba(0,0,0,0.2);
}

.user-dot-overflow {
    background: var(--text-muted);
    font-size: 7px;
}

/* ============================================
   Member Avatar with Upload
   ============================================ */

.member-avatar {
    position: relative;
    width: 36px;
    height: 36px;
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.875rem;
    font-weight: 600;
    color: white;
    flex-shrink: 0;
    background-size: cover;
    background-position: center;
}

.member-avatar.has-image {
    background-color: transparent;
}

.avatar-upload-btn {
    position: absolute;
    bottom: -4px;
    right: -4px;
    width: 20px;
    height: 20px;
    background: var(--bg-elevated);
    border: 1px solid var(--border-default);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    opacity: 0;
    transition: opacity var(--transition-fast);
}

.member-avatar:hover .avatar-upload-btn {
    opacity: 1;
}

.avatar-upload-icon {
    font-size: 10px;
}

.member-color-dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    flex-shrink: 0;
    margin-left: auto;
    margin-right: var(--space-sm);
}

/* ============================================
   Profile Page
   ============================================ */

.profile-container {
    max-width: 500px;
    margin: 0 auto;
    padding: var(--space-2xl);
}

.profile-avatar-section {
    display: flex;
    flex-direction: column;
    align-items: center;
    margin-bottom: var(--space-2xl);
}

.profile-avatar {
    width: 120px;
    height: 120px;
    border-radius: 50%;
    background: var(--input-bg);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 3rem;
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: var(--space-md);
    background-size: cover;
    background-position: center;
    position: relative;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.profile-avatar:hover {
    border: 2px solid var(--cyan);
}

.profile-avatar-overlay {
    position: absolute;
    inset: 0;
    background: rgba(0,0,0,0.5);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity var(--transition-fast);
}

.profile-avatar:hover .profile-avatar-overlay {
    opacity: 1;
}

.profile-avatar-overlay span {
    color: white;
    font-size: 0.875rem;
}