/* ==========================================
   VARIABLES & FOUNDATIONS
   ========================================== */

:root {
    /* Anime-inspired color palette */
    --bg-primary: #0f0f1e;
    --bg-secondary: #1a1a2e;
    --bg-tertiary: #252541;
    --bg-elevated: #2d2d4a;
    
    /* Vibrant accents */
    --accent-primary: #7c3aed;
    --accent-secondary: #ec4899;
    --accent-gradient: linear-gradient(135deg, #7c3aed 0%, #ec4899 100%);
    --accent-glow: rgba(124, 58, 237, 0.2);
    
    /* Character colors */
    --character1-color: #f59e0b;
    --character2-color: #ec4899;
    --character3-color: #8b5cf6;
    
    /* Text hierarchy */
    --text-primary: #f3f4f6;
    --text-secondary: #d1d5db;
    --text-tertiary: #9ca3af;
    --text-muted: #6b7280;
    
    /* Borders & dividers */
    --border-primary: #374151;
    --border-subtle: #2d2d4a;
    
    /* Semantic */
    --success: #10b981;
    --warning: #f59e0b;
    --error: #ef4444;
    
    /* Shadows & depth */
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.4);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.5);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.6);
    
    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    
    /* Typography */
    --font-primary: 'Poppins', 'Noto Sans JP', sans-serif;
    
    /* Transitions */
    --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-base: 250ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 400ms cubic-bezier(0.4, 0, 0.2, 1);
}

/* ==========================================
   BASE STYLES
   ========================================== */

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

body {
    font-family: var(--font-primary);
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    scroll-behavior: smooth;
    position: relative;
}

body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: 
        radial-gradient(circle at 20% 30%, rgba(124, 58, 237, 0.03) 0%, transparent 50%),
        radial-gradient(circle at 80% 70%, rgba(236, 72, 153, 0.02) 0%, transparent 50%);
    pointer-events: none;
    z-index: 0;
}

#app {
    position: relative;
    z-index: 1;
}

#app {
    flex: 1;
    display: flex;
    flex-direction: column;
    position: relative;
}

.hidden {
    display: none !important;
}

/* ==========================================
   HEADER
   ========================================== */

.app-header {
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border-primary);
    padding: var(--spacing-md) var(--spacing-lg);
    position: sticky;
    top: 0;
    z-index: 100;
    backdrop-filter: blur(10px);
}

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

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

.header-logo {
    font-size: 1.25rem;
    font-weight: 600;
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.header-divider {
    width: 1px;
    height: 20px;
    background: var(--border-primary);
}

.header-version {
    font-size: 0.875rem;
    color: var(--text-tertiary);
}

.reset-btn {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-md);
    background: transparent;
    border: 1px solid var(--border-primary);
    color: var(--text-secondary);
    border-radius: 8px;
    cursor: pointer;
    font-size: 0.875rem;
    transition: all var(--transition-base);
}

.reset-btn:hover {
    background: var(--bg-tertiary);
    border-color: var(--accent-primary);
    color: var(--text-primary);
}

/* ==========================================
   VIEW SECTIONS
   ========================================== */

.view-section {
    flex: 1;
    display: flex;
    flex-direction: column;
}

/* ==========================================
   LANDING PAGE
   ========================================== */

.landing-container {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-2xl) var(--spacing-lg);
}

.landing-content {
    max-width: 800px;
    width: 100%;
    text-align: center;
}

.landing-header {
    margin-bottom: var(--spacing-2xl);
}

.landing-icon {
    font-size: 4rem;
    margin-bottom: var(--spacing-lg);
    animation: float 3s ease-in-out infinite;
}

@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-10px); }
}

.landing-title {
    font-size: 3rem;
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: var(--spacing-md);
}

.title-line.primary {
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    display: block;
}

.landing-subtitle {
    font-size: 1.25rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-2xl);
}

.landing-features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-2xl);
}

.feature-card {
    background: var(--bg-secondary);
    border: 1px solid var(--border-primary);
    border-radius: 12px;
    padding: var(--spacing-lg);
    text-align: center;
    transition: all var(--transition-base);
}

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

.feature-icon {
    font-size: 2.5rem;
    margin-bottom: var(--spacing-md);
}

.feature-title {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
}

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

.landing-actions {
    margin-bottom: var(--spacing-2xl);
}

.btn-large {
    padding: var(--spacing-md) var(--spacing-2xl);
    font-size: 1.125rem;
}

.landing-info {
    background: var(--bg-secondary);
    border: 1px solid var(--border-primary);
    border-radius: 12px;
    padding: var(--spacing-lg);
}

.info-text {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-md);
}

.info-link {
    color: var(--accent-primary);
    text-decoration: none;
    font-weight: 500;
    transition: color var(--transition-base);
}

.info-link:hover {
    color: var(--accent-secondary);
}

/* ==========================================
   FORM VIEWS (API KEY)
   ========================================== */

.form-container {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-2xl) var(--spacing-lg);
}

.form-content {
    max-width: 500px;
    width: 100%;
    background: var(--bg-secondary);
    border: 1px solid var(--border-primary);
    border-radius: 16px;
    padding: var(--spacing-2xl);
}

.form-header {
    text-align: center;
    margin-bottom: var(--spacing-2xl);
}

.form-icon {
    font-size: 3rem;
    margin-bottom: var(--spacing-md);
}

.form-title {
    font-size: 1.875rem;
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
}

.form-subtitle {
    color: var(--text-secondary);
}

.form-body {
    margin-bottom: var(--spacing-lg);
}

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

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

.text-input {
    width: 100%;
    padding: var(--spacing-md);
    background: var(--bg-tertiary);
    border: 1px solid var(--border-primary);
    border-radius: 8px;
    color: var(--text-primary);
    font-size: 1rem;
    transition: all var(--transition-base);
}

.text-input:focus {
    outline: none;
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 3px var(--accent-glow);
}

.form-help {
    margin-top: var(--spacing-sm);
    font-size: 0.875rem;
    color: var(--text-tertiary);
}

.link {
    color: var(--accent-primary);
    text-decoration: none;
}

.link:hover {
    text-decoration: underline;
}

.form-error {
    margin-top: var(--spacing-sm);
    padding: var(--spacing-sm);
    background: rgba(239, 68, 68, 0.1);
    border: 1px solid var(--error);
    border-radius: 6px;
    color: var(--error);
    font-size: 0.875rem;
}

#admin-locked {
    margin-top: var(--spacing-md);
    padding: 0;
    background: none;
    border: none;
}

.locked-card {
    background: var(--bg-tertiary);
    border: 1px solid var(--border-primary);
    border-radius: 12px;
    padding: var(--spacing-xl);
    text-align: center;
}

.locked-icon {
    font-size: 3rem;
    margin-bottom: var(--spacing-md);
    animation: gentlePulse 2s ease-in-out infinite;
}

@keyframes gentlePulse {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.8; transform: scale(1.05); }
}

.locked-title {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
    color: var(--text-primary);
}

.locked-description {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-md);
    line-height: 1.6;
}

.locked-subtitle {
    color: var(--text-tertiary);
    font-size: 0.875rem;
    margin-bottom: var(--spacing-lg);
    font-weight: 500;
}

.locked-options {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.btn-locked-option {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-lg);
    background: var(--bg-secondary);
    border: 2px solid var(--border-primary);
    border-radius: 12px;
    cursor: pointer;
    transition: all var(--transition-base);
    text-align: left;
    width: 100%;
    position: relative;
    overflow: hidden;
}

.btn-locked-option::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(124, 58, 237, 0.1), transparent);
    transition: left var(--transition-slow);
}

.btn-locked-option:hover::before {
    left: 100%;
}

.btn-locked-option:hover {
    border-color: var(--accent-primary);
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(124, 58, 237, 0.2);
}

.locked-option-icon {
    font-size: 2rem;
    flex-shrink: 0;
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-elevated);
    border-radius: 10px;
    border: 1px solid var(--border-primary);
}

.locked-option-content {
    flex: 1;
}

.locked-option-title {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--spacing-xs);
}

.locked-option-desc {
    font-size: 0.875rem;
    color: var(--text-tertiary);
}

.btn-locked-option svg {
    flex-shrink: 0;
    color: var(--text-muted);
    transition: all var(--transition-base);
}

.btn-locked-option:hover svg {
    color: var(--accent-primary);
    transform: translateX(4px);
}

.btn-locked-option > * {
    position: relative;
    z-index: 1;
}

.form-actions {
    display: flex;
    gap: var(--spacing-md);
}

.form-footer {
    padding-top: var(--spacing-lg);
    border-top: 1px solid var(--border-primary);
}

.footer-note {
    font-size: 0.875rem;
    color: var(--text-tertiary);
    text-align: center;
}

/* Access Method Selection */
.access-options {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
}

.access-option {
    background: var(--bg-tertiary);
    border: 2px solid var(--border-primary);
    border-radius: 12px;
    padding: var(--spacing-lg);
    transition: all var(--transition-base);
    cursor: pointer;
}

.access-option:hover {
    border-color: var(--accent-primary);
    transform: translateY(-2px);
    box-shadow: 0 4px 16px rgba(124, 58, 237, 0.2);
}

.option-header {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-sm);
}

.option-icon {
    font-size: 2rem;
}

.option-title {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--text-primary);
}

.option-description {
    font-size: 0.875rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-md);
}

.btn-option {
    width: 100%;
    padding: var(--spacing-sm) var(--spacing-lg);
    background: transparent;
    border: 1px solid var(--accent-primary);
    color: var(--accent-primary);
    border-radius: 8px;
    font-size: 0.875rem;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-base);
}

.btn-option:hover {
    background: var(--accent-gradient);
    color: white;
    transform: scale(1.02);
}

.access-divider {
    text-align: center;
    position: relative;
    margin: var(--spacing-md) 0;
}

.access-divider::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 0;
    right: 0;
    height: 1px;
    background: var(--border-primary);
}

.access-divider span {
    position: relative;
    background: var(--bg-secondary);
    padding: 0 var(--spacing-md);
    color: var(--text-muted);
    font-size: 0.875rem;
    font-weight: 500;
}

.access-form {
    animation: fadeIn 0.3s ease-out;
}

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

/* ==========================================
   CHARACTER SELECTION
   ========================================== */

.character-container {
    flex: 1;
    padding: var(--spacing-2xl) var(--spacing-lg);
    overflow-y: auto;
}

.character-content {
    max-width: 1000px;
    margin: 0 auto;
}

.character-header {
    text-align: center;
    margin-bottom: var(--spacing-2xl);
}

.character-page-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: var(--spacing-xl);
    gap: var(--spacing-lg);
}

.character-page-header .character-header {
    margin-bottom: 0;
    flex: 1;
}

#reset-btn-character {
    flex-shrink: 0;
}

.character-title {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
}

.character-subtitle {
    font-size: 1.125rem;
    color: var(--text-secondary);
}

.character-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-2xl);
}

.character-card {
    background: var(--bg-secondary);
    border: 2px solid var(--border-primary);
    border-radius: 16px;
    padding: var(--spacing-xl);
    text-align: center;
    transition: all var(--transition-base);
    cursor: pointer;
    position: relative;
    overflow: hidden;
}

.character-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--accent-gradient);
    opacity: 0;
    transition: opacity var(--transition-base);
    z-index: 0;
}

.character-card:hover::before {
    opacity: 0.05;
}

.character-card:hover {
    transform: translateY(-8px);
    border-color: var(--accent-primary);
    box-shadow: 0 12px 40px rgba(124, 58, 237, 0.3);
}

.character-card > * {
    position: relative;
    z-index: 1;
}

.character-avatar {
    margin-bottom: var(--spacing-lg);
}

.character-image {
    width: 140px;
    height: 140px;
    border-radius: 50%;
    object-fit: cover;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.4);
    border: 4px solid transparent;
    background: linear-gradient(var(--bg-secondary), var(--bg-secondary)) padding-box,
                var(--accent-gradient) border-box;
    transition: all var(--transition-base);
}

.character-card:hover .character-image {
    transform: scale(1.08);
    box-shadow: 0 12px 32px rgba(124, 58, 237, 0.4);
}

.avatar-placeholder {
    width: 120px;
    height: 120px;
    margin: 0 auto;
    background: var(--accent-gradient);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-md);
}

.avatar-emoji {
    font-size: 4rem;
}

.character-info {
    margin-bottom: var(--spacing-lg);
}

.character-name {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
}

.character-role {
    font-size: 0.875rem;
    color: var(--accent-primary);
    font-weight: 500;
    margin-bottom: var(--spacing-sm);
}

.character-desc {
    font-size: 0.875rem;
    color: var(--text-secondary);
    line-height: 1.5;
}

.btn-select {
    width: 100%;
    padding: var(--spacing-md);
    background: var(--accent-gradient);
    border: none;
    color: white;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-base);
}

.btn-select:hover {
    transform: scale(1.05);
    box-shadow: var(--shadow-md);
}

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

.character-note {
    text-align: center;
    margin-top: var(--spacing-lg);
    padding: var(--spacing-md);
    background: var(--bg-elevated);
    border: 1px solid var(--border-subtle);
    border-radius: 8px;
}

.character-note p {
    color: var(--text-secondary);
    font-size: 0.875rem;
    margin: 0;
}

/* ==========================================
   CHAT VIEW
   ========================================== */

#view-chat {
    display: flex;
    flex-direction: column;
    height: calc(100vh - 64px);
    overflow: hidden;
}

.character-bar {
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border-primary);
    padding: var(--spacing-md) var(--spacing-lg);
    flex-shrink: 0;
    z-index: 50;
    backdrop-filter: blur(10px);
}

.character-bar-content {
    max-width: 900px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--spacing-md);
}

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

.character-bar-avatar {
    width: 52px;
    height: 52px;
    border-radius: 50%;
    overflow: hidden;
    border: 3px solid transparent;
    background: linear-gradient(var(--bg-secondary), var(--bg-secondary)) padding-box,
                var(--accent-gradient) border-box;
    flex-shrink: 0;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
}

.character-bar-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.avatar-emoji {
    width: 48px;
    height: 48px;
    background: var(--accent-gradient);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
}

.character-bar-info {
    flex: 1;
}

.character-bar-name {
    font-size: 1.125rem;
    font-weight: 600;
}

.character-bar-status {
    font-size: 0.875rem;
    color: var(--success);
    display: flex;
    align-items: center;
    gap: 6px;
}

.character-bar-status::before {
    content: '';
    width: 8px;
    height: 8px;
    background: var(--success);
    border-radius: 50%;
    animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% {
        opacity: 1;
        transform: scale(1);
    }
    50% {
        opacity: 0.6;
        transform: scale(0.9);
    }
}

.character-bar-actions {
    display: flex;
    gap: var(--spacing-sm);
}

.btn-clear-chat,
.btn-export,
.btn-change-character {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-md);
    background: transparent;
    border: 1px solid var(--border-primary);
    color: var(--text-secondary);
    border-radius: 8px;
    cursor: pointer;
    font-size: 0.875rem;
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
}

.btn-clear-chat::before,
.btn-export::before,
.btn-change-character::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: var(--accent-gradient);
    opacity: 0.1;
    transition: left var(--transition-base);
}

.btn-clear-chat:hover::before,
.btn-export:hover::before,
.btn-change-character:hover::before {
    left: 0;
}

.btn-clear-chat:hover,
.btn-export:hover,
.btn-change-character:hover {
    border-color: var(--accent-primary);
    color: var(--text-primary);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(124, 58, 237, 0.2);
}

.btn-clear-chat > *,
.btn-export > *,
.btn-change-character > * {
    position: relative;
    z-index: 1;
}

.chat-area {
    flex: 1;
    overflow-y: auto;
    background: linear-gradient(180deg, 
        var(--bg-primary) 0%, 
        rgba(26, 26, 46, 0.5) 50%,
        var(--bg-primary) 100%
    );
    position: relative;
}

.chat-area::before {
    content: '';
    position: fixed;
    top: 64px;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(circle at 50% 50%, rgba(124, 58, 237, 0.03) 0%, transparent 70%);
    pointer-events: none;
    z-index: 0;
}

.chat-messages {
    max-width: 900px;
    margin: 0 auto;
    padding: var(--spacing-lg);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
    position: relative;
    z-index: 1;
}

.message {
    display: flex;
    gap: var(--spacing-md);
    animation: messageSlideIn 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

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

.user-message {
    justify-content: flex-end;
}

.character-message {
    justify-content: flex-start;
}

.message-avatar {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    overflow: hidden;
    border: 3px solid transparent;
    background: linear-gradient(var(--bg-primary), var(--bg-primary)) padding-box,
                var(--accent-gradient) border-box;
    flex-shrink: 0;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
}

.message-avatar-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.message-content {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
    max-width: 70%;
}

.message-bubble {
    padding: var(--spacing-md) var(--spacing-lg);
    border-radius: 16px;
    word-wrap: break-word;
    line-height: 1.5;
}

.message-bubble em {
    font-style: italic;
    opacity: 0.9;
}

.message-bubble strong {
    font-weight: 600;
}

.user-message .message-content {
    align-items: flex-end;
}

.character-message .message-content {
    align-items: flex-start;
}

.user-message .message-bubble {
    background: var(--accent-gradient);
    color: white;
    border-bottom-right-radius: 4px;
    box-shadow: 0 2px 12px rgba(124, 58, 237, 0.3);
}

.character-message .message-bubble {
    background: var(--bg-secondary);
    border: 1px solid var(--border-primary);
    border-bottom-left-radius: 4px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
}

.message-timestamp {
    font-size: 0.75rem;
    color: var(--text-muted);
    padding: 0 var(--spacing-sm);
}

.input-area {
    background: var(--bg-secondary);
    border-top: 1px solid var(--border-primary);
    padding: var(--spacing-lg);
    flex-shrink: 0;
}

.input-wrapper {
    max-width: 900px;
    margin: 0 auto;
    display: flex;
    gap: var(--spacing-md);
    align-items: flex-end;
}

.user-input {
    flex: 1;
    padding: var(--spacing-md) var(--spacing-lg);
    background: var(--bg-tertiary);
    border: 2px solid var(--border-primary);
    border-radius: 12px;
    color: var(--text-primary);
    font-size: 1rem;
    font-family: var(--font-primary);
    resize: none;
    max-height: 120px;
    transition: all var(--transition-base);
}

.user-input:hover {
    border-color: var(--border-subtle);
    background: var(--bg-elevated);
}

.user-input:focus {
    outline: none;
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 4px var(--accent-glow);
    background: var(--bg-elevated);
}

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

.send-btn {
    width: 48px;
    height: 48px;
    background: var(--accent-gradient);
    border: none;
    border-radius: 12px;
    color: white;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-base);
    flex-shrink: 0;
    box-shadow: 0 4px 12px rgba(124, 58, 237, 0.3);
    position: relative;
}

.send-btn:not(:disabled)::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 100%;
    height: 100%;
    border-radius: 12px;
    background: var(--accent-gradient);
    opacity: 0;
    animation: buttonPulse 2s ease-in-out infinite;
}

@keyframes buttonPulse {
    0%, 100% {
        opacity: 0;
        transform: translate(-50%, -50%) scale(1);
    }
    50% {
        opacity: 0.3;
        transform: translate(-50%, -50%) scale(1.1);
    }
}

.send-btn:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(124, 58, 237, 0.5);
}

.send-btn:active:not(:disabled) {
    transform: translateY(0);
}

.send-btn:disabled {
    opacity: 0.4;
    cursor: not-allowed;
    box-shadow: none;
}

.send-btn svg {
    position: relative;
    z-index: 1;
}

.typing-indicator {
    max-width: 900px;
    margin: var(--spacing-md) auto 0;
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    color: var(--text-tertiary);
    font-size: 0.875rem;
}

.typing-dots {
    display: flex;
    gap: 4px;
}

.typing-dot {
    width: 6px;
    height: 6px;
    background: var(--accent-primary);
    border-radius: 50%;
    animation: typingBounce 1.4s infinite;
}

.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);
    }
}

/* ==========================================
   INITIAL LOADING OVERLAY
   ========================================== */

.initial-loading-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(15, 15, 30, 0.95);
    backdrop-filter: blur(8px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    opacity: 0;
    transition: opacity var(--transition-slow);
}

.initial-loading-overlay.visible {
    opacity: 1;
}

.loading-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-lg);
}

.loading-avatar-pulse {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    background: var(--accent-gradient);
    position: relative;
    animation: avatarPulse 2s ease-in-out infinite;
}

.loading-avatar-pulse::before,
.loading-avatar-pulse::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 100%;
    height: 100%;
    border-radius: 50%;
    border: 2px solid var(--accent-primary);
    opacity: 0;
}

.loading-avatar-pulse::before {
    animation: ripple 2s ease-out infinite;
}

.loading-avatar-pulse::after {
    animation: ripple 2s ease-out infinite 1s;
}

@keyframes avatarPulse {
    0%, 100% {
        transform: scale(1);
        opacity: 1;
    }
    50% {
        transform: scale(1.1);
        opacity: 0.8;
    }
}

@keyframes ripple {
    0% {
        width: 100%;
        height: 100%;
        opacity: 0.5;
    }
    100% {
        width: 180%;
        height: 180%;
        opacity: 0;
    }
}

.loading-text {
    font-size: 1.125rem;
    color: var(--text-secondary);
    font-weight: 500;
}

.loading-dots {
    display: flex;
    gap: 8px;
}

.loading-dot {
    width: 8px;
    height: 8px;
    background: var(--accent-primary);
    border-radius: 50%;
    animation: loadingBounce 1.4s infinite ease-in-out;
}

.loading-dot:nth-child(1) {
    animation-delay: 0s;
}

.loading-dot:nth-child(2) {
    animation-delay: 0.2s;
}

.loading-dot:nth-child(3) {
    animation-delay: 0.4s;
}

@keyframes loadingBounce {
    0%, 60%, 100% {
        transform: translateY(0);
        opacity: 0.7;
    }
    30% {
        transform: translateY(-12px);
        opacity: 1;
    }
}

/* ==========================================
   BUTTONS
   ========================================== */

.btn-primary,
.btn-secondary {
    padding: var(--spacing-md) var(--spacing-lg);
    border: none;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-base);
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
}

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

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

.btn-primary:active {
    transform: translateY(0);
    box-shadow: 0 2px 8px rgba(124, 58, 237, 0.4);
}

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

.btn-secondary:hover {
    background: var(--bg-tertiary);
    color: var(--text-primary);
    border-color: var(--accent-primary);
}

.btn-secondary:active {
    background: var(--bg-elevated);
    transform: scale(0.98);
}

/* ==========================================
   FOOTER
   ========================================== */

.app-footer {
    background: var(--bg-secondary);
    border-top: 1px solid var(--border-primary);
    padding: var(--spacing-md);
    text-align: center;
}

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

/* ==========================================
   RESPONSIVE
   ========================================== */

@media (max-width: 768px) {
    .landing-title {
        font-size: 2rem;
    }
    
    .landing-subtitle {
        font-size: 1rem;
    }
    
    .character-grid {
        grid-template-columns: 1fr;
    }
    
    .character-page-header {
        flex-direction: column;
        align-items: center;
    }
    
    .character-page-header .character-header {
        text-align: center;
    }
    
    .message-content {
        max-width: 85%;
    }
    
    .form-content {
        padding: var(--spacing-lg);
    }
    
    .character-bar-content {
        flex-wrap: wrap;
    }
    
    .character-bar-actions {
        width: 100%;
        justify-content: flex-end;
    }
    
    .btn-clear-chat,
    .btn-export,
    .btn-change-character {
        font-size: 0.75rem;
        padding: var(--spacing-xs) var(--spacing-sm);
    }
    
    .btn-clear-chat span,
    .btn-export span,
    .btn-change-character span {
        display: none;
    }
    
    .locked-card {
        padding: var(--spacing-lg);
    }
    
    .locked-icon {
        font-size: 2.5rem;
    }
    
    .locked-title {
        font-size: 1.25rem;
    }
    
    .btn-locked-option {
        padding: var(--spacing-md);
    }
    
    .locked-option-icon {
        width: 40px;
        height: 40px;
        font-size: 1.5rem;
    }
    
    .loading-avatar-pulse {
        width: 64px;
        height: 64px;
    }
    
    .loading-text {
        font-size: 1rem;
    }
}

/* ==========================================
   SCROLLBAR
   ========================================== */

::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: var(--bg-primary);
}

::-webkit-scrollbar-thumb {
    background: var(--bg-tertiary);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--border-primary);
}