/* ============================================
   ROYAL AI CHAT - PREMIUM THEME STYLES
   ============================================ */

/* ============================================
   CSS VARIABLES & RESET
   ============================================ */
:root {
    /* Royal Color Palette - Dark Mode (Default) */
    --color-primary: #2d1b4e;
    --color-primary-light: #3d2b5e;
    --color-primary-dark: #1a0033;
    --color-secondary: #1e3a8a;
    --color-accent: #d4af37;
    --color-accent-glow: rgba(212, 175, 55, 0.4);
    --color-background: #0a0015;
    --color-surface: rgba(45, 27, 78, 0.3);
    --color-surface-hover: rgba(45, 27, 78, 0.5);
    --color-text: #ffffff;
    --color-text-secondary: #b8b8d1;
    --color-border: rgba(212, 175, 55, 0.2);

    /* Gradients */
    --gradient-primary: linear-gradient(135deg, #2d1b4e 0%, #1e3a8a 100%);
    --gradient-surface: linear-gradient(135deg, rgba(45, 27, 78, 0.4) 0%, rgba(30, 58, 138, 0.3) 100%);
    --gradient-accent: linear-gradient(135deg, #d4af37 0%, #f4d03f 100%);
    --gradient-background: radial-gradient(circle at 20% 30%, rgba(45, 27, 78, 0.4) 0%, transparent 50%),
        radial-gradient(circle at 80% 70%, rgba(30, 58, 138, 0.3) 0%, transparent 50%),
        radial-gradient(circle at 50% 50%, rgba(212, 175, 55, 0.1) 0%, transparent 70%);

    /* Spacing */
    --spacing-xs: 4px;
    --spacing-sm: 8px;
    --spacing-md: 16px;
    --spacing-lg: 24px;
    --spacing-xl: 32px;

    /* Border Radius */
    --radius-sm: 8px;
    --radius-md: 16px;
    --radius-lg: 24px;
    --radius-xl: 32px;

    /* Shadows */
    --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);
    --shadow-glow: 0 0 20px var(--color-accent-glow);
    --shadow-glow-strong: 0 0 30px var(--color-accent-glow), 0 0 60px var(--color-accent-glow);

    /* Transitions */
    --transition-fast: 200ms ease;
    --transition-medium: 300ms ease;
    --transition-slow: 500ms ease;
}

/* Light Mode Theme */
body.light-mode {
    --color-primary: #6b46c1;
    --color-primary-light: #7c3aed;
    --color-primary-dark: #553c9a;
    --color-secondary: #3b82f6;
    --color-accent: #d97706;
    --color-accent-glow: rgba(217, 119, 6, 0.3);
    --color-background: #f8f9fa;
    --color-surface: rgba(255, 255, 255, 0.8);
    --color-surface-hover: rgba(255, 255, 255, 0.95);
    --color-text: #1a202c;
    --color-text-secondary: #4a5568;
    --color-border: rgba(217, 119, 6, 0.3);

    --gradient-primary: linear-gradient(135deg, #6b46c1 0%, #3b82f6 100%);
    --gradient-surface: linear-gradient(135deg, rgba(255, 255, 255, 0.9) 0%, rgba(249, 250, 251, 0.8) 100%);
    --gradient-accent: linear-gradient(135deg, #d97706 0%, #f59e0b 100%);
    --gradient-background: radial-gradient(circle at 20% 30%, rgba(107, 70, 193, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 80% 70%, rgba(59, 130, 246, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 50% 50%, rgba(217, 119, 6, 0.05) 0%, transparent 70%);

    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.15);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.2);
}

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

body {
    font-family: 'Inter', sans-serif;
    background: var(--color-background);
    color: var(--color-text);
    overflow: hidden;
    position: relative;
    transition: background var(--transition-medium), color var(--transition-medium);
}

/* Animated Background */
body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--gradient-background);
    animation: backgroundPulse 15s ease-in-out infinite;
    z-index: -1;
    transition: background var(--transition-medium);
}

@keyframes backgroundPulse {

    0%,
    100% {
        opacity: 0.5;
        transform: scale(1);
    }

    50% {
        opacity: 0.8;
        transform: scale(1.1);
    }
}

/* ============================================
   TYPOGRAPHY
   ============================================ */
h1,
h2,
h3 {
    font-family: 'Playfair Display', serif;
    font-weight: 700;
}

/* ============================================
   LAYOUT
   ============================================ */
.container {
    max-width: 900px;
    height: 100vh;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    padding: var(--spacing-lg);
    animation: fadeInUp 0.8s ease;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ============================================
   HEADER
   ============================================ */
.chat-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-lg);
    background: var(--gradient-surface);
    backdrop-filter: blur(20px);
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-border);
    box-shadow: var(--shadow-md);
    margin-bottom: var(--spacing-lg);
}

.header-content {
    flex: 1;
}

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

.app-title {
    font-size: 2rem;
    background: var(--gradient-accent);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: var(--spacing-xs);
    text-shadow: 0 0 30px var(--color-accent-glow);
}

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

/* ============================================
   MESSAGES CONTAINER
   ============================================ */
.messages-container {
    flex: 1;
    overflow-y: auto;
    padding: var(--spacing-md);
    margin-bottom: var(--spacing-md);
    scroll-behavior: smooth;
}

/* Custom Scrollbar */
.messages-container::-webkit-scrollbar {
    width: 8px;
}

.messages-container::-webkit-scrollbar-track {
    background: rgba(255, 255, 255, 0.05);
    border-radius: 10px;
}

.messages-container::-webkit-scrollbar-thumb {
    background: var(--gradient-accent);
    border-radius: 10px;
}

.messages-container::-webkit-scrollbar-thumb:hover {
    background: var(--color-accent);
}

/* Welcome Message */
.welcome-message {
    text-align: center;
    padding: var(--spacing-xl);
    animation: fadeInScale 0.8s ease 0.3s both;
}

@keyframes fadeInScale {
    from {
        opacity: 0;
        transform: scale(0.9);
    }

    to {
        opacity: 1;
        transform: scale(1);
    }
}

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

@keyframes float {

    0%,
    100% {
        transform: translateY(0);
    }

    50% {
        transform: translateY(-10px);
    }
}

.welcome-message h2 {
    font-size: 1.75rem;
    margin-bottom: var(--spacing-sm);
    color: var(--color-accent);
}

.welcome-message p {
    color: var(--color-text-secondary);
    max-width: 500px;
    margin: 0 auto;
}

/* Message Bubble */
.message {
    display: flex;
    margin-bottom: var(--spacing-lg);
    animation: messageSlideIn 0.4s ease;
    opacity: 0;
    animation-fill-mode: forwards;
}

@keyframes messageSlideIn {
    from {
        opacity: 0;
        transform: translateY(20px) scale(0.95);
    }

    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

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

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

.message-bubble {
    max-width: 70%;
    padding: var(--spacing-md) var(--spacing-lg);
    border-radius: var(--radius-lg);
    position: relative;
    backdrop-filter: blur(10px);
    border: 1px solid transparent;
    transition: all var(--transition-medium);
    animation: bubbleExpand 0.3s ease;
}

@keyframes bubbleExpand {
    from {
        transform: scale(0.9);
    }

    to {
        transform: scale(1);
    }
}

.message.user .message-bubble {
    background: var(--gradient-primary);
    border-color: var(--color-accent);
    box-shadow: var(--shadow-md), var(--shadow-glow);
}

.message.ai .message-bubble {
    background: var(--gradient-surface);
    border-color: var(--color-border);
    box-shadow: var(--shadow-md);
}

.message-bubble:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg), var(--shadow-glow-strong);
}

.message-text {
    line-height: 1.6;
    word-wrap: break-word;
}

.message-image {
    max-width: 100%;
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-sm);
    box-shadow: var(--shadow-sm);
}

/* ============================================
   TYPING INDICATOR
   ============================================ */
.typing-indicator {
    display: none;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-md) var(--spacing-lg);
    background: var(--gradient-surface);
    backdrop-filter: blur(10px);
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-border);
    width: fit-content;
    margin-bottom: var(--spacing-md);
    margin-left: var(--spacing-md);
    box-shadow: var(--shadow-md);
}

.typing-indicator.active {
    display: flex;
    animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }

    to {
        opacity: 1;
    }
}

.typing-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--color-accent);
    animation: typingBounce 1.4s infinite ease-in-out;
    box-shadow: 0 0 10px var(--color-accent-glow);
}

.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(-10px);
    }
}

/* ============================================
   INPUT AREA
   ============================================ */
.input-area {
    background: var(--gradient-surface);
    backdrop-filter: blur(20px);
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-border);
    box-shadow: var(--shadow-lg);
    padding: var(--spacing-md);
}

.image-preview-container {
    display: none;
    margin-bottom: var(--spacing-md);
}

.image-preview-container.active {
    display: block;
    animation: fadeInScale 0.3s ease;
}

.image-preview-wrapper {
    position: relative;
    display: inline-block;
    border-radius: var(--radius-md);
    overflow: hidden;
    box-shadow: var(--shadow-md);
}

#imagePreview {
    max-width: 200px;
    max-height: 200px;
    display: block;
    border-radius: var(--radius-md);
}

.remove-image-btn {
    position: absolute;
    top: var(--spacing-sm);
    right: var(--spacing-sm);
    background: rgba(0, 0, 0, 0.7);
    border: none;
    border-radius: 50%;
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    color: white;
    transition: all var(--transition-fast);
}

.remove-image-btn:hover {
    background: rgba(255, 0, 0, 0.8);
    transform: scale(1.1);
}

.input-controls {
    display: flex;
    align-items: flex-end;
    gap: var(--spacing-md);
}

#messageInput {
    flex: 1;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
    color: var(--color-text);
    font-family: 'Inter', sans-serif;
    font-size: 1rem;
    resize: none;
    max-height: 150px;
    transition: all var(--transition-medium);
}

#messageInput:focus {
    outline: none;
    border-color: var(--color-accent);
    box-shadow: 0 0 0 3px var(--color-accent-glow);
}

#messageInput::placeholder {
    color: var(--color-text-secondary);
}

/* ============================================
   BUTTONS
   ============================================ */
.icon-btn {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    color: var(--color-text);
    transition: all var(--transition-fast);
    position: relative;
    overflow: hidden;
}

.icon-btn:hover {
    background: var(--color-surface-hover);
    border-color: var(--color-accent);
    transform: scale(1.05);
    box-shadow: var(--shadow-glow);
}

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

/* Ripple Effect */
.icon-btn::after {
    content: '';
    position: absolute;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle, var(--color-accent-glow) 0%, transparent 70%);
    transform: scale(0);
    opacity: 0;
    transition: transform var(--transition-medium), opacity var(--transition-medium);
}

.icon-btn:active::after {
    transform: scale(2);
    opacity: 1;
    transition: 0s;
}

.send-btn {
    background: var(--gradient-accent);
    border: none;
    border-radius: var(--radius-md);
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    color: var(--color-primary-dark);
    transition: all var(--transition-fast);
    position: relative;
    overflow: hidden;
    box-shadow: var(--shadow-md);
}

.send-btn:hover:not(:disabled) {
    transform: scale(1.1);
    box-shadow: var(--shadow-glow-strong);
}

.send-btn:active:not(:disabled) {
    transform: scale(0.95);
}

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

/* Ripple Effect for Send Button */
.send-btn::after {
    content: '';
    position: absolute;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle, rgba(255, 255, 255, 0.5) 0%, transparent 70%);
    transform: scale(0);
    opacity: 0;
    transition: transform var(--transition-medium), opacity var(--transition-medium);
}

.send-btn:active:not(:disabled)::after {
    transform: scale(2);
    opacity: 1;
    transition: 0s;
}

/* ============================================
   MODAL
   ============================================ */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.8);
    backdrop-filter: blur(10px);
    z-index: 1000;
    align-items: center;
    justify-content: center;
    animation: fadeIn 0.3s ease;
}

.modal.active {
    display: flex;
}

.modal-content {
    background: var(--gradient-surface);
    backdrop-filter: blur(20px);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
    padding: var(--spacing-xl);
    max-width: 500px;
    width: 90%;
    box-shadow: var(--shadow-lg), var(--shadow-glow);
    animation: modalSlideIn 0.4s ease;
}

@keyframes modalSlideIn {
    from {
        opacity: 0;
        transform: translateY(-50px) scale(0.9);
    }

    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

.modal-header h2 {
    font-size: 1.75rem;
    margin-bottom: var(--spacing-sm);
    background: var(--gradient-accent);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.modal-header p {
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-lg);
}

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

.modal-body input {
    width: 100%;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
    color: var(--color-text);
    font-family: 'Inter', sans-serif;
    font-size: 1rem;
    transition: all var(--transition-medium);
}

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

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

.help-text a {
    color: var(--color-accent);
    text-decoration: none;
    transition: color var(--transition-fast);
}

.help-text a:hover {
    color: var(--color-text);
    text-decoration: underline;
}

.modal-footer {
    margin-top: var(--spacing-lg);
}

.btn-primary {
    width: 100%;
    background: var(--gradient-accent);
    border: none;
    border-radius: var(--radius-md);
    padding: var(--spacing-md) var(--spacing-lg);
    color: var(--color-primary-dark);
    font-family: 'Inter', sans-serif;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-fast);
    box-shadow: var(--shadow-md);
}

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

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

/* ============================================
   THEME TOGGLE
   ============================================ */
#themeToggle {
    position: relative;
}

#themeToggle .sun-icon,
#themeToggle .moon-icon {
    transition: opacity var(--transition-fast), transform var(--transition-fast);
}

body.light-mode #themeToggle .sun-icon {
    display: none;
}

body.light-mode #themeToggle .moon-icon {
    display: block !important;
}

/* ============================================
   COPYRIGHT FOOTER
   ============================================ */
.copyright-footer {
    text-align: center;
    padding: var(--spacing-md) 0;
    margin-top: var(--spacing-sm);
    color: var(--color-text-secondary);
    font-size: 0.875rem;
}

.copyright-footer p {
    margin: 0;
}

.copyright-footer strong {
    color: var(--color-accent);
    font-weight: 600;
    background: var(--gradient-accent);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* ============================================
   RESPONSIVE DESIGN
   ============================================ */
@media (max-width: 768px) {
    .container {
        padding: var(--spacing-md);
    }

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

    .app-title {
        font-size: 1.5rem;
    }

    .message-bubble {
        max-width: 85%;
    }

    .modal-content {
        padding: var(--spacing-lg);
    }

    .welcome-icon {
        font-size: 3rem;
    }

    .welcome-message h2 {
        font-size: 1.5rem;
    }
}

@media (max-width: 480px) {
    .app-title {
        font-size: 1.25rem;
    }

    .app-subtitle {
        font-size: 0.75rem;
    }

    .message-bubble {
        max-width: 90%;
        padding: var(--spacing-sm) var(--spacing-md);
    }

    #imagePreview {
        max-width: 150px;
        max-height: 150px;
    }
}