/* ============================================
   BubbleChat - Fun & Vibrant Chat System
   Mobile-First Responsive Design
   ============================================ */

/* CSS Variables */
:root {
    /* Fun Color Palette */
    --primary: #FF6B9D;
    --primary-dark: #E85A8A;
    --secondary: #7C5CFF;
    --accent-1: #00D4AA;
    --accent-2: #FFB347;
    --accent-3: #4ECDC4;
    --accent-4: #FF6B6B;
    
    /* Gradients */
    --gradient-main: linear-gradient(135deg, #FF6B9D 0%, #C44569 50%, #7C5CFF 100%);
    --gradient-fun: linear-gradient(135deg, #FFB347 0%, #FF6B9D 50%, #7C5CFF 100%);
    --gradient-cool: linear-gradient(135deg, #4ECDC4 0%, #44A08D 100%);
    --gradient-card: linear-gradient(145deg, rgba(255,255,255,0.95), rgba(255,255,255,0.85));
    
    /* Neutrals */
    --bg-main: #FFF5F8;
    --bg-card: #FFFFFF;
    --text-dark: #2D3047;
    --text-medium: #5C6378;
    --text-light: #9CA3B8;
    --border: rgba(124, 92, 255, 0.15);
    
    /* Shadows */
    --shadow-sm: 0 2px 8px rgba(124, 92, 255, 0.1);
    --shadow-md: 0 4px 20px rgba(124, 92, 255, 0.15);
    --shadow-lg: 0 8px 40px rgba(124, 92, 255, 0.2);
    --shadow-glow: 0 0 30px rgba(255, 107, 157, 0.3);
    
    /* Spacing */
    --space-xs: 4px;
    --space-sm: 8px;
    --space-md: 16px;
    --space-lg: 24px;
    --space-xl: 32px;
    --space-2xl: 48px;
    
    /* Border Radius */
    --radius-sm: 8px;
    --radius-md: 16px;
    --radius-lg: 24px;
    --radius-xl: 32px;
    --radius-full: 50%;
    
    /* Typography */
    --font-display: 'Fredoka', sans-serif;
    --font-body: 'Nunito', sans-serif;
    
    /* Transitions */
    --transition-fast: 0.15s ease;
    --transition-normal: 0.25s ease;
    --transition-slow: 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Reset & Base */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    font-size: 16px;
    -webkit-text-size-adjust: 100%;
}

body {
    font-family: var(--font-body);
    background: var(--bg-main);
    color: var(--text-dark);
    min-height: 100vh;
    min-height: 100dvh;
    overflow-x: hidden;
    line-height: 1.5;
}

/* ============================================
   Background Animations
   ============================================ */
.bg-animations {
    position: fixed;
    inset: 0;
    pointer-events: none;
    z-index: 0;
    overflow: hidden;
}

.bubble {
    position: absolute;
    border-radius: var(--radius-full);
    opacity: 0.4;
    animation: float 20s infinite ease-in-out;
}

.bubble-1 {
    width: 300px;
    height: 300px;
    background: radial-gradient(circle, var(--primary) 0%, transparent 70%);
    top: -100px;
    right: -100px;
    animation-delay: 0s;
}

.bubble-2 {
    width: 200px;
    height: 200px;
    background: radial-gradient(circle, var(--secondary) 0%, transparent 70%);
    bottom: 10%;
    left: -50px;
    animation-delay: -5s;
}

.bubble-3 {
    width: 150px;
    height: 150px;
    background: radial-gradient(circle, var(--accent-1) 0%, transparent 70%);
    top: 40%;
    right: 5%;
    animation-delay: -10s;
}

.bubble-4 {
    width: 100px;
    height: 100px;
    background: radial-gradient(circle, var(--accent-2) 0%, transparent 70%);
    bottom: 30%;
    right: 20%;
    animation-delay: -3s;
}

.bubble-5 {
    width: 180px;
    height: 180px;
    background: radial-gradient(circle, var(--accent-3) 0%, transparent 70%);
    top: 60%;
    left: 10%;
    animation-delay: -7s;
}

.bubble-6 {
    width: 120px;
    height: 120px;
    background: radial-gradient(circle, var(--accent-4) 0%, transparent 70%);
    top: 20%;
    left: 30%;
    animation-delay: -12s;
}

@keyframes float {
    0%, 100% { transform: translate(0, 0) scale(1); }
    25% { transform: translate(30px, -30px) scale(1.05); }
    50% { transform: translate(-20px, 20px) scale(0.95); }
    75% { transform: translate(20px, 30px) scale(1.02); }
}

.star {
    position: absolute;
    font-size: 24px;
    color: var(--accent-2);
    animation: twinkle 3s infinite ease-in-out;
    opacity: 0.6;
}

.star-1 { top: 15%; left: 10%; animation-delay: 0s; }
.star-2 { top: 25%; right: 15%; animation-delay: -1s; }
.star-3 { bottom: 20%; left: 20%; animation-delay: -2s; }
.star-4 { bottom: 35%; right: 25%; animation-delay: -0.5s; }

@keyframes twinkle {
    0%, 100% { opacity: 0.3; transform: scale(1) rotate(0deg); }
    50% { opacity: 0.8; transform: scale(1.2) rotate(180deg); }
}

/* ============================================
   Screen Management
   ============================================ */
.screen {
    display: none;
    min-height: 100vh;
    min-height: 100dvh;
    position: relative;
    z-index: 1;
}

.screen.active {
    display: flex;
    flex-direction: column;
    animation: fadeIn 0.4s ease;
}

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

/* ============================================
   Toast Notifications
   ============================================ */
.toast {
    position: fixed;
    top: var(--space-lg);
    left: 50%;
    transform: translateX(-50%) translateY(-100px);
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    padding: var(--space-md) var(--space-lg);
    box-shadow: var(--shadow-lg);
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    z-index: 1000;
    transition: transform var(--transition-slow);
    border: 2px solid var(--border);
}

.toast.show {
    transform: translateX(-50%) translateY(0);
}

.toast.hidden {
    display: flex;
}

.toast.error {
    border-color: var(--accent-4);
    background: #FFF5F5;
}

.toast.success {
    border-color: var(--accent-1);
    background: #F0FFF9;
}

.toast-icon {
    font-size: 1.5rem;
}

.toast-message {
    font-weight: 600;
    color: var(--text-dark);
}

/* ============================================
   Access Gate Screen
   ============================================ */
#access-gate {
    align-items: center;
    justify-content: center;
    padding: var(--space-lg);
}

.gate-container {
    width: 100%;
    max-width: 400px;
    text-align: center;
    position: relative;
}

.logo-area {
    margin-bottom: var(--space-xl);
}

.logo-bubble {
    width: 100px;
    height: 100px;
    background: var(--gradient-main);
    border-radius: var(--radius-xl);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--space-md);
    box-shadow: var(--shadow-glow);
    animation: pulse 2s infinite ease-in-out;
}

@keyframes pulse {
    0%, 100% { transform: scale(1); box-shadow: var(--shadow-glow); }
    50% { transform: scale(1.05); box-shadow: 0 0 50px rgba(255, 107, 157, 0.5); }
}

.logo-emoji {
    font-size: 3rem;
    filter: drop-shadow(0 2px 4px rgba(0,0,0,0.2));
}

.app-title {
    font-family: var(--font-display);
    font-size: 2.5rem;
    font-weight: 700;
    background: var(--gradient-main);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: var(--space-xs);
}

.tagline {
    color: var(--text-medium);
    font-size: 1.1rem;
    font-weight: 600;
}

.gate-card {
    background: var(--gradient-card);
    backdrop-filter: blur(10px);
    border-radius: var(--radius-xl);
    padding: var(--space-xl);
    box-shadow: var(--shadow-lg);
    border: 2px solid rgba(255,255,255,0.8);
}

.gate-header {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
    margin-bottom: var(--space-lg);
}

.gate-header h2 {
    font-family: var(--font-display);
    font-size: 1.3rem;
    color: var(--text-dark);
}

.lock-icon {
    font-size: 1.5rem;
}

.gate-form {
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
}

.hint-text {
    margin-top: var(--space-md);
    color: var(--text-light);
    font-size: 0.9rem;
}

/* Floating Emojis */
.floating-emojis {
    position: absolute;
    inset: 0;
    pointer-events: none;
}

.float-emoji {
    position: absolute;
    font-size: 2rem;
    animation: floatEmoji 6s infinite ease-in-out;
    opacity: 0.7;
}

.e1 { top: -20px; left: 10%; animation-delay: 0s; }
.e2 { top: 30%; right: -10px; animation-delay: -1.5s; }
.e3 { bottom: 10%; left: -10px; animation-delay: -3s; }
.e4 { bottom: 30%; right: 10%; animation-delay: -4.5s; }

@keyframes floatEmoji {
    0%, 100% { transform: translateY(0) rotate(-10deg); }
    50% { transform: translateY(-20px) rotate(10deg); }
}

/* ============================================
   Input Groups & Buttons
   ============================================ */
.input-group {
    position: relative;
}

.input-group input,
.input-group textarea {
    width: 100%;
    padding: var(--space-md) var(--space-lg);
    padding-right: 50px;
    font-family: var(--font-body);
    font-size: 1rem;
    font-weight: 600;
    border: 3px solid var(--border);
    border-radius: var(--radius-lg);
    background: var(--bg-card);
    color: var(--text-dark);
    transition: all var(--transition-normal);
    outline: none;
}

.input-group input:focus,
.input-group textarea:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 4px rgba(255, 107, 157, 0.15);
}

.input-group input::placeholder,
.input-group textarea::placeholder {
    color: var(--text-light);
    font-weight: 500;
}

.input-icon {
    position: absolute;
    right: var(--space-md);
    top: 50%;
    transform: translateY(-50%);
    font-size: 1.3rem;
    pointer-events: none;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
    font-family: var(--font-display);
    font-size: 1rem;
    font-weight: 600;
    padding: var(--space-md) var(--space-lg);
    border: none;
    border-radius: var(--radius-lg);
    cursor: pointer;
    transition: all var(--transition-normal);
    text-decoration: none;
}

.btn-primary {
    background: var(--gradient-main);
    color: white;
    box-shadow: var(--shadow-md);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn-primary:active {
    transform: translateY(0);
}

.btn-lg {
    padding: var(--space-md) var(--space-xl);
    font-size: 1.1rem;
}

.btn-block {
    width: 100%;
}

.btn-icon {
    width: 44px;
    height: 44px;
    padding: 0;
    background: var(--bg-card);
    border: 2px solid var(--border);
    border-radius: var(--radius-md);
    font-size: 1.3rem;
}

.btn-icon:hover {
    background: var(--bg-main);
    border-color: var(--primary);
}

.btn-emoji {
    font-size: 1.2rem;
}

/* ============================================
   Username Screen
   ============================================ */
#username-screen {
    align-items: center;
    justify-content: center;
    padding: var(--space-lg);
}

.username-container {
    width: 100%;
    max-width: 400px;
    text-align: center;
    background: var(--gradient-card);
    backdrop-filter: blur(10px);
    border-radius: var(--radius-xl);
    padding: var(--space-xl);
    box-shadow: var(--shadow-lg);
    border: 2px solid rgba(255,255,255,0.8);
}

.avatar-preview {
    margin-bottom: var(--space-lg);
}

.avatar-circle {
    width: 80px;
    height: 80px;
    background: var(--gradient-main);
    border-radius: var(--radius-full);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-display);
    font-size: 2rem;
    font-weight: 700;
    color: white;
    box-shadow: var(--shadow-md);
    transition: background var(--transition-normal);
}

.section-title {
    font-family: var(--font-display);
    font-size: 1.5rem;
    color: var(--text-dark);
    margin-bottom: var(--space-lg);
}

.username-form {
    display: flex;
    flex-direction: column;
    gap: var(--space-lg);
}

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

.color-picker label {
    display: block;
    font-weight: 700;
    color: var(--text-medium);
    margin-bottom: var(--space-sm);
    font-size: 0.9rem;
}

.color-options {
    display: flex;
    gap: var(--space-sm);
    flex-wrap: wrap;
}

.color-btn {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-md);
    border: 3px solid transparent;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.color-btn:hover {
    transform: scale(1.1);
}

.color-btn.active {
    border-color: var(--text-dark);
    box-shadow: var(--shadow-md);
}

/* ============================================
   Dashboard Screen
   ============================================ */
#dashboard {
    padding-bottom: var(--space-lg);
}

.dash-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-md) var(--space-lg);
    background: var(--gradient-card);
    backdrop-filter: blur(10px);
    border-bottom: 2px solid var(--border);
    position: sticky;
    top: 0;
    z-index: 10;
}

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

.mini-avatar {
    width: 44px;
    height: 44px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-display);
    font-size: 1.2rem;
    font-weight: 700;
    color: white;
    box-shadow: var(--shadow-sm);
}

.header-info {
    display: flex;
    flex-direction: column;
}

.greeting {
    font-size: 0.9rem;
    color: var(--text-medium);
}

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

.active-count {
    display: flex;
    align-items: center;
    gap: var(--space-xs);
    font-size: 0.8rem;
    color: var(--accent-1);
    font-weight: 700;
}

.pulse-dot {
    width: 8px;
    height: 8px;
    background: var(--accent-1);
    border-radius: var(--radius-full);
    animation: pulseDot 1.5s infinite;
}

@keyframes pulseDot {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.5; transform: scale(1.3); }
}

.dash-content {
    padding: var(--space-lg);
    flex: 1;
}

.dash-actions {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-md);
    margin-bottom: var(--space-xl);
}

.action-card {
    background: var(--bg-card);
    border: 3px solid var(--border);
    border-radius: var(--radius-lg);
    padding: var(--space-lg);
    cursor: pointer;
    transition: all var(--transition-normal);
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-xs);
}

.action-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
    border-color: var(--primary);
}

.action-card.create-room:hover {
    background: linear-gradient(135deg, #FFF5F8 0%, #FFF 100%);
}

.action-icon {
    font-size: 2rem;
    margin-bottom: var(--space-xs);
}

.action-text {
    font-family: var(--font-display);
    font-size: 1rem;
    font-weight: 700;
    color: var(--text-dark);
}

.action-desc {
    font-size: 0.75rem;
    color: var(--text-light);
}

.rooms-section {
    flex: 1;
}

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

.section-header span {
    font-family: var(--font-display);
    font-size: 1.1rem;
    color: var(--text-dark);
}

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

.room-card {
    background: var(--bg-card);
    border: 3px solid var(--border);
    border-radius: var(--radius-lg);
    padding: var(--space-md) var(--space-lg);
    display: flex;
    align-items: center;
    justify-content: space-between;
    cursor: pointer;
    transition: all var(--transition-normal);
    animation: slideIn 0.3s ease;
}

@keyframes slideIn {
    from { opacity: 0; transform: translateX(-20px); }
    to { opacity: 1; transform: translateX(0); }
}

.room-card:hover {
    transform: translateX(8px);
    border-color: var(--secondary);
    box-shadow: var(--shadow-sm);
}

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

.room-icon {
    width: 50px;
    height: 50px;
    background: var(--gradient-fun);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
}

.room-details h4 {
    font-family: var(--font-display);
    font-size: 1rem;
    color: var(--text-dark);
    margin-bottom: 2px;
}

.room-meta {
    font-size: 0.8rem;
    color: var(--text-light);
}

.room-join {
    background: var(--gradient-cool);
    color: white;
    font-family: var(--font-display);
    font-weight: 700;
    padding: var(--space-sm) var(--space-md);
    border-radius: var(--radius-md);
    border: none;
    cursor: pointer;
    transition: transform var(--transition-fast);
}

.room-join:hover {
    transform: scale(1.05);
}

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

.empty-icon {
    font-size: 3rem;
    display: block;
    margin-bottom: var(--space-md);
    opacity: 0.5;
}

/* ============================================
   Modal Styles
   ============================================ */
.modal {
    position: fixed;
    inset: 0;
    z-index: 100;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-lg);
}

.modal.hidden {
    display: none;
}

.modal-backdrop {
    position: absolute;
    inset: 0;
    background: rgba(45, 48, 71, 0.6);
    backdrop-filter: blur(4px);
    animation: fadeIn 0.2s ease;
}

.modal-content {
    position: relative;
    background: var(--bg-card);
    border-radius: var(--radius-xl);
    padding: var(--space-xl);
    width: 100%;
    max-width: 400px;
    box-shadow: var(--shadow-lg);
    animation: modalPop 0.3s ease;
}

@keyframes modalPop {
    from { opacity: 0; transform: scale(0.9) translateY(20px); }
    to { opacity: 1; transform: scale(1) translateY(0); }
}

.modal-close {
    position: absolute;
    top: var(--space-md);
    right: var(--space-md);
    width: 32px;
    height: 32px;
    border: none;
    background: var(--bg-main);
    border-radius: var(--radius-sm);
    cursor: pointer;
    font-size: 1rem;
    color: var(--text-medium);
    transition: all var(--transition-fast);
}

.modal-close:hover {
    background: var(--accent-4);
    color: white;
}

.modal-header {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    margin-bottom: var(--space-lg);
}

.modal-icon {
    font-size: 1.8rem;
}

.modal-header h3 {
    font-family: var(--font-display);
    font-size: 1.3rem;
    color: var(--text-dark);
}

.modal form {
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
}

/* ============================================
   Chat Room Screen
   ============================================ */
#chat-room {
    display: flex;
    flex-direction: column;
    height: 100vh;
    height: 100dvh;
}

.chat-header {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    padding: var(--space-md) var(--space-lg);
    background: var(--gradient-card);
    backdrop-filter: blur(10px);
    border-bottom: 2px solid var(--border);
    flex-shrink: 0;
}

.back-btn span {
    font-size: 1.5rem;
}

.chat-info {
    flex: 1;
}

.chat-info h2 {
    font-family: var(--font-display);
    font-size: 1.1rem;
    color: var(--text-dark);
    line-height: 1.2;
}

.chat-meta {
    display: flex;
    align-items: center;
    gap: var(--space-xs);
    font-size: 0.75rem;
    color: var(--accent-1);
    font-weight: 700;
}

.chat-actions {
    display: flex;
    gap: var(--space-xs);
}

.disappearing-banner {
    background: linear-gradient(135deg, var(--secondary) 0%, var(--primary) 100%);
    color: white;
    text-align: center;
    padding: var(--space-sm) var(--space-md);
    font-size: 0.8rem;
    font-weight: 700;
    animation: slideDown 0.3s ease;
}

.disappearing-banner.hidden {
    display: none;
}

@keyframes slideDown {
    from { transform: translateY(-100%); }
    to { transform: translateY(0); }
}

.messages-container {
    flex: 1;
    overflow-y: auto;
    padding: var(--space-md);
    display: flex;
    flex-direction: column;
}

.messages-list {
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
    margin-top: auto;
}

/* Message Bubbles */
.message {
    display: flex;
    gap: var(--space-sm);
    max-width: 85%;
    animation: messagePop 0.3s ease;
}

@keyframes messagePop {
    0% { opacity: 0; transform: translateY(20px) scale(0.9); }
    50% { transform: translateY(-5px) scale(1.02); }
    100% { opacity: 1; transform: translateY(0) scale(1); }
}

.message.own {
    flex-direction: row-reverse;
    align-self: flex-end;
}

.message-avatar {
    width: 36px;
    height: 36px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-display);
    font-size: 0.9rem;
    font-weight: 700;
    color: white;
    flex-shrink: 0;
}

.message-content {
    background: var(--bg-card);
    border: 2px solid var(--border);
    border-radius: var(--radius-lg);
    padding: var(--space-sm) var(--space-md);
    box-shadow: var(--shadow-sm);
}

.message.own .message-content {
    background: var(--gradient-main);
    border-color: transparent;
    color: white;
}

.message-header {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    margin-bottom: var(--space-xs);
}

.message-author {
    font-family: var(--font-display);
    font-weight: 700;
    font-size: 0.85rem;
    color: var(--text-dark);
}

.message.own .message-author {
    color: rgba(255,255,255,0.9);
}

.message-time {
    font-size: 0.7rem;
    color: var(--text-light);
}

.message.own .message-time {
    color: rgba(255,255,255,0.7);
}

.message-text {
    font-size: 0.95rem;
    line-height: 1.4;
    word-wrap: break-word;
}

.message-media {
    margin-top: var(--space-sm);
    border-radius: var(--radius-md);
    overflow: hidden;
}

.message-media img,
.message-media video {
    max-width: 100%;
    max-height: 300px;
    display: block;
    border-radius: var(--radius-sm);
}

/* Typing Indicator */
.typing-indicator {
    display: flex;
    gap: 4px;
    padding: var(--space-md);
    align-self: flex-start;
}

.typing-indicator.hidden {
    display: none;
}

.typing-dot {
    width: 8px;
    height: 8px;
    background: var(--text-light);
    border-radius: var(--radius-full);
    animation: typingBounce 1.4s infinite ease-in-out;
}

.typing-dot:nth-child(1) { animation-delay: 0s; }
.typing-dot:nth-child(2) { animation-delay: 0.2s; }
.typing-dot:nth-child(3) { animation-delay: 0.4s; }

@keyframes typingBounce {
    0%, 60%, 100% { transform: translateY(0); }
    30% { transform: translateY(-8px); }
}

/* Upload Progress */
.upload-progress {
    padding: var(--space-sm) var(--space-lg);
    background: var(--bg-card);
    border-top: 2px solid var(--border);
}

.upload-progress.hidden {
    display: none;
}

.progress-info {
    display: flex;
    justify-content: space-between;
    font-size: 0.8rem;
    margin-bottom: var(--space-xs);
}

.progress-text {
    color: var(--text-medium);
    font-weight: 600;
}

.progress-percent {
    color: var(--primary);
    font-weight: 700;
}

.progress-bar {
    height: 8px;
    background: var(--border);
    border-radius: var(--radius-sm);
    overflow: hidden;
}

.progress-fill {
    height: 100%;
    background: var(--gradient-main);
    width: 0%;
    transition: width 0.2s ease;
    border-radius: var(--radius-sm);
}

/* Message Form */
.message-form {
    padding: var(--space-md);
    background: var(--gradient-card);
    backdrop-filter: blur(10px);
    border-top: 2px solid var(--border);
    flex-shrink: 0;
}

.message-input-area {
    display: flex;
    align-items: flex-end;
    gap: var(--space-sm);
}

.attach-btn {
    flex-shrink: 0;
}

.input-wrapper {
    flex: 1;
    position: relative;
}

.input-wrapper textarea {
    width: 100%;
    padding: var(--space-md);
    font-family: var(--font-body);
    font-size: 1rem;
    border: 3px solid var(--border);
    border-radius: var(--radius-lg);
    background: var(--bg-card);
    color: var(--text-dark);
    resize: none;
    outline: none;
    max-height: 120px;
    transition: border-color var(--transition-fast);
}

.input-wrapper textarea:focus {
    border-color: var(--primary);
}

.btn-send {
    width: 50px;
    height: 50px;
    padding: 0;
    background: var(--gradient-main);
    border: none;
    border-radius: var(--radius-lg);
    font-size: 1.5rem;
    box-shadow: var(--shadow-md);
    flex-shrink: 0;
}

.btn-send:hover {
    transform: scale(1.05);
}

.btn-send:active {
    transform: scale(0.95);
}

/* Attachment Preview */
.attachment-preview {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-top: var(--space-sm);
    padding: var(--space-sm);
    background: var(--bg-main);
    border-radius: var(--radius-md);
    border: 2px dashed var(--border);
}

.attachment-preview.hidden {
    display: none;
}

.preview-content {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    overflow: hidden;
}

.preview-content img,
.preview-content video {
    width: 60px;
    height: 60px;
    object-fit: cover;
    border-radius: var(--radius-sm);
}

.preview-name {
    font-size: 0.85rem;
    color: var(--text-medium);
    font-weight: 600;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    max-width: 150px;
}

.remove-attachment {
    width: 32px;
    height: 32px;
    padding: 0;
    font-size: 0.9rem;
}

/* Room Info Modal */
.room-info-content {
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
}

.info-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--space-sm) 0;
    border-bottom: 1px solid var(--border);
}

.info-row:last-child {
    border-bottom: none;
}

.info-label {
    color: var(--text-light);
    font-size: 0.9rem;
}

.info-value {
    font-weight: 700;
    color: var(--text-dark);
}

/* ============================================
   System Messages
   ============================================ */
.system-message {
    text-align: center;
    padding: var(--space-sm) var(--space-md);
    color: var(--text-light);
    font-size: 0.85rem;
    font-style: italic;
}

.system-message span {
    background: var(--bg-main);
    padding: var(--space-xs) var(--space-md);
    border-radius: var(--radius-lg);
    display: inline-block;
}

/* ============================================
   Responsive Design
   ============================================ */
@media (min-width: 768px) {
    .gate-card {
        padding: var(--space-2xl);
    }
    
    .dash-content {
        max-width: 700px;
        margin: 0 auto;
    }
    
    .messages-container {
        padding: var(--space-lg) var(--space-xl);
    }
    
    .message {
        max-width: 60%;
    }
    
    .message-form {
        padding: var(--space-lg) var(--space-xl);
    }
}

@media (min-width: 1024px) {
    .dash-content {
        max-width: 800px;
    }
    
    .action-card {
        padding: var(--space-xl);
    }
    
    .action-icon {
        font-size: 2.5rem;
    }
    
    .action-text {
        font-size: 1.1rem;
    }
}

/* ============================================
   Scrollbar Styling
   ============================================ */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: transparent;
}

::-webkit-scrollbar-thumb {
    background: var(--border);
    border-radius: var(--radius-sm);
}

::-webkit-scrollbar-thumb:hover {
    background: var(--text-light);
}

/* ============================================
   Loading States
   ============================================ */
.loading {
    position: relative;
    pointer-events: none;
}

.loading::after {
    content: '';
    position: absolute;
    inset: 0;
    background: rgba(255,255,255,0.8);
    border-radius: inherit;
    display: flex;
    align-items: center;
    justify-content: center;
}

.spinner {
    width: 24px;
    height: 24px;
    border: 3px solid var(--border);
    border-top-color: var(--primary);
    border-radius: var(--radius-full);
    animation: spin 0.8s linear infinite;
}

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

/* Hidden utility */
.hidden {
    display: none !important;
}