/* ============================================
   PIGNick Tracker - Stylesheet
   Light & Dark Mode mit PIGNick Branding
   Created by Nikolas Kato
   ============================================ */

/* ============================================
   MARK: - CSS Variables - Light Mode (Default)
   ============================================ */
:root,
[data-theme="light"] {
    /* PIGNick Farben - Light Mode */
    --bg-primary: #e8f4fc;
    --bg-secondary: #d4edfc;
    --bg-tertiary: #ffffff;
    --bg-gradient-start: #87CEEB;
    --bg-gradient-end: #98D8AA;
    
    /* Glass Effekte - Light */
    --glass-bg: rgba(255, 255, 255, 0.7);
    --glass-border: rgba(255, 255, 255, 0.8);
    --glass-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
    
    /* PIGNick Akzentfarben */
    --accent-primary: #1a1a4e;
    --accent-secondary: #2d5a7b;
    --accent-pink: #FFB6C1;
    --accent-pink-dark: #FF91A4;
    --accent-green: #4CAF50;
    --accent-green-light: #98D8AA;
    --accent-yellow: #FFD93D;
    --accent-glow: rgba(26, 26, 78, 0.2);
    
    /* Text - Light */
    --text-primary: #1a1a4e;
    --text-secondary: rgba(26, 26, 78, 0.7);
    --text-tertiary: rgba(26, 26, 78, 0.5);
    
    /* Message Colors */
    --msg-assistant-bg: #ffffff;
    --msg-assistant-border: rgba(26, 26, 78, 0.1);
    --msg-user-bg: linear-gradient(135deg, #1a1a4e, #2d5a7b);
    --msg-user-text: #ffffff;
    
    /* Button */
    --btn-primary-bg: linear-gradient(135deg, #1a1a4e, #2d5a7b);
    --btn-primary-text: #ffffff;
    
    /* Clouds (nur Light Mode) */
    --cloud-opacity: 1;
    
    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    
    /* Border Radius */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --radius-full: 9999px;
    
    /* Transitions */
    --transition-fast: 0.15s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
    --transition-theme: 0.4s ease;
}

/* ============================================
   MARK: - CSS Variables - Dark Mode
   ============================================ */
[data-theme="dark"] {
    /* Farben - Dark Mode */
    --bg-primary: #0a0a0f;
    --bg-secondary: #12121a;
    --bg-tertiary: #1a1a24;
    --bg-gradient-start: #0a0a0f;
    --bg-gradient-end: #12121a;
    
    /* Glass Effekte - Dark */
    --glass-bg: rgba(255, 255, 255, 0.03);
    --glass-border: rgba(255, 255, 255, 0.08);
    --glass-shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
    
    /* Akzentfarben - Dark */
    --accent-primary: #10b981;
    --accent-secondary: #34d399;
    --accent-pink: #FF6B9D;
    --accent-pink-dark: #FF4081;
    --accent-green: #10b981;
    --accent-green-light: #34d399;
    --accent-yellow: #FBBF24;
    --accent-glow: rgba(16, 185, 129, 0.3);
    
    /* Text - Dark */
    --text-primary: #ffffff;
    --text-secondary: rgba(255, 255, 255, 0.7);
    --text-tertiary: rgba(255, 255, 255, 0.4);
    
    /* Message Colors - Dark */
    --msg-assistant-bg: #1a1a24;
    --msg-assistant-border: rgba(255, 255, 255, 0.08);
    --msg-user-bg: linear-gradient(135deg, #10b981, #0d9668);
    --msg-user-text: #ffffff;
    
    /* Button - Dark */
    --btn-primary-bg: linear-gradient(135deg, #10b981, #0d9668);
    --btn-primary-text: #ffffff;
    
    /* No Clouds in Dark Mode */
    --cloud-opacity: 0;
}

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

html {
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: 'Nunito', 'Poppins', -apple-system, BlinkMacSystemFont, sans-serif;
    background: linear-gradient(180deg, var(--bg-gradient-start) 0%, var(--bg-gradient-end) 100%);
    background-attachment: fixed;
    color: var(--text-primary);
    min-height: 100vh;
    overflow-x: hidden;
    line-height: 1.6;
    transition: background var(--transition-theme), color var(--transition-theme);
}

/* ============================================
   MARK: - Background Effects
   ============================================ */
.background-effects {
    position: fixed;
    inset: 0;
    pointer-events: none;
    z-index: 0;
    overflow: hidden;
}

/* Gradient Orbs */
.gradient-orb {
    position: absolute;
    border-radius: 50%;
    filter: blur(80px);
    opacity: 0.4;
    animation: float 20s ease-in-out infinite;
    transition: opacity var(--transition-theme);
}

.gradient-orb-1 {
    width: 400px;
    height: 400px;
    background: linear-gradient(135deg, var(--accent-green-light), transparent);
    top: -100px;
    right: -100px;
    animation-delay: 0s;
}

.gradient-orb-2 {
    width: 300px;
    height: 300px;
    background: linear-gradient(135deg, var(--accent-pink), transparent);
    bottom: 20%;
    left: -50px;
    animation-delay: -7s;
}

.gradient-orb-3 {
    width: 250px;
    height: 250px;
    background: linear-gradient(135deg, var(--accent-yellow), transparent);
    bottom: -50px;
    right: 30%;
    animation-delay: -14s;
}

@keyframes float {
    0%, 100% { transform: translate(0, 0) scale(1); }
    25% { transform: translate(20px, -20px) scale(1.05); }
    50% { transform: translate(-10px, 20px) scale(0.95); }
    75% { transform: translate(-20px, -10px) scale(1.02); }
}

/* Clouds - Light Mode Only */
.clouds-layer {
    position: absolute;
    inset: 0;
    opacity: var(--cloud-opacity);
    transition: opacity var(--transition-theme);
}

.cloud {
    position: absolute;
    background: white;
    border-radius: 100px;
    opacity: 0.9;
    animation: cloudFloat 60s linear infinite;
}

.cloud::before,
.cloud::after {
    content: '';
    position: absolute;
    background: white;
    border-radius: 50%;
}

.cloud-1 {
    width: 200px;
    height: 60px;
    top: 10%;
    left: -200px;
    animation-duration: 45s;
}

.cloud-1::before {
    width: 80px;
    height: 80px;
    top: -40px;
    left: 30px;
}

.cloud-1::after {
    width: 60px;
    height: 60px;
    top: -30px;
    left: 90px;
}

.cloud-2 {
    width: 150px;
    height: 50px;
    top: 25%;
    left: -150px;
    animation-duration: 55s;
    animation-delay: -20s;
}

.cloud-2::before {
    width: 60px;
    height: 60px;
    top: -30px;
    left: 20px;
}

.cloud-2::after {
    width: 50px;
    height: 50px;
    top: -25px;
    left: 70px;
}

.cloud-3 {
    width: 180px;
    height: 55px;
    top: 5%;
    left: -180px;
    animation-duration: 65s;
    animation-delay: -35s;
}

.cloud-3::before {
    width: 70px;
    height: 70px;
    top: -35px;
    left: 25px;
}

.cloud-3::after {
    width: 55px;
    height: 55px;
    top: -28px;
    left: 85px;
}

@keyframes cloudFloat {
    from { transform: translateX(0); }
    to { transform: translateX(calc(100vw + 300px)); }
}

/* Noise Overlay */
.noise-overlay {
    position: absolute;
    inset: 0;
    background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)'/%3E%3C/svg%3E");
    opacity: 0.02;
    mix-blend-mode: overlay;
}

/* ============================================
   MARK: - Glass Panel
   ============================================ */
.glass-panel {
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--glass-border);
    box-shadow: var(--glass-shadow);
    transition: background var(--transition-theme), 
                border-color var(--transition-theme),
                box-shadow var(--transition-theme);
}

.glass-input {
    background: var(--glass-bg);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid var(--glass-border);
    transition: all var(--transition-theme);
}

/* ============================================
   MARK: - App Container
   ============================================ */
.app-container {
    position: relative;
    z-index: 1;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    max-width: 800px;
    margin: 0 auto;
    padding: var(--spacing-md);
}

/* ============================================
   MARK: - Header
   ============================================ */
.app-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-md) var(--spacing-lg);
    border-radius: var(--radius-xl);
    margin-bottom: var(--spacing-md);
    animation: slideDown 0.6s ease-out;
}

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

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

.logo-icon {
    width: 50px;
    height: 50px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-md);
    overflow: hidden;
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
}

.logo-icon img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.logo-text h1 {
    font-size: 1.6rem;
    font-weight: 800;
    color: var(--accent-primary);
    letter-spacing: -0.02em;
    transition: color var(--transition-theme);
}

[data-theme="dark"] .logo-text h1 {
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.logo-subtitle {
    font-size: 0.75rem;
    color: var(--text-tertiary);
    font-weight: 600;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    transition: color var(--transition-theme);
}

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

/* Theme Toggle Button */
.theme-toggle {
    width: 44px;
    height: 44px;
    border: none;
    border-radius: var(--radius-md);
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
    transition: all var(--transition-fast);
}

.theme-toggle:hover {
    transform: scale(1.05);
    box-shadow: 0 4px 15px var(--accent-glow);
}

.toggle-icon {
    position: absolute;
    width: 22px;
    height: 22px;
    color: var(--accent-primary);
    transition: all var(--transition-normal);
}

.toggle-icon svg {
    width: 100%;
    height: 100%;
}

/* Light Mode: Show Moon, Hide Sun */
[data-theme="light"] .toggle-icon.sun {
    opacity: 0;
    transform: rotate(90deg) scale(0);
}

[data-theme="light"] .toggle-icon.moon {
    opacity: 1;
    transform: rotate(0) scale(1);
}

/* Dark Mode: Show Sun, Hide Moon */
[data-theme="dark"] .toggle-icon.sun {
    opacity: 1;
    transform: rotate(0) scale(1);
}

[data-theme="dark"] .toggle-icon.moon {
    opacity: 0;
    transform: rotate(-90deg) scale(0);
}

/* Status Indicator */
.header-status {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: 0.85rem;
    color: var(--text-secondary);
    font-weight: 500;
}

.status-indicator {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: #6b7280;
}

.status-indicator.online {
    background: var(--accent-green);
    box-shadow: 0 0 10px rgba(76, 175, 80, 0.5);
    animation: statusPulse 2s ease-in-out infinite;
}

@keyframes statusPulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

/* ============================================
   MARK: - Chat Container
   ============================================ */
.chat-container {
    flex: 1;
    display: flex;
    flex-direction: column;
    border-radius: var(--radius-xl);
    overflow: hidden;
    animation: fadeIn 0.8s ease-out 0.2s backwards;
}

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

/* ============================================
   MARK: - Chat Messages
   ============================================ */
.chat-messages {
    flex: 1;
    overflow-y: auto;
    padding: var(--spacing-lg);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
    min-height: 400px;
    max-height: 60vh;
}

/* Custom Scrollbar */
.chat-messages::-webkit-scrollbar {
    width: 6px;
}

.chat-messages::-webkit-scrollbar-track {
    background: transparent;
}

.chat-messages::-webkit-scrollbar-thumb {
    background: var(--glass-border);
    border-radius: var(--radius-full);
}

.chat-messages::-webkit-scrollbar-thumb:hover {
    background: var(--text-tertiary);
}

/* ============================================
   MARK: - Message Styles
   ============================================ */
.message {
    display: flex;
    gap: var(--spacing-md);
    animation: messageSlide 0.4s ease-out;
}

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

.message.user {
    flex-direction: row-reverse;
}

.message-avatar {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-md);
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    font-size: 1.4rem;
    transition: all var(--transition-theme);
}

.avatar-emoji {
    line-height: 1;
}

/* Avatar Bild (offizielles Logo) */
.avatar-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: var(--radius-md);
}

.message.user .message-avatar {
    background: var(--msg-user-bg);
    border: none;
}

.message.user .avatar-emoji {
    filter: brightness(0) invert(1);
}

.message-content {
    max-width: 75%;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

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

.message-bubble {
    padding: var(--spacing-md) var(--spacing-lg);
    border-radius: var(--radius-lg);
    background: var(--msg-assistant-bg);
    border: 1px solid var(--msg-assistant-border);
    transition: all var(--transition-theme);
}

.message.user .message-bubble {
    background: var(--msg-user-bg);
    border: none;
    color: var(--msg-user-text);
}

.message-bubble p {
    margin-bottom: var(--spacing-sm);
}

.message-bubble p:last-child {
    margin-bottom: 0;
}

.message-bubble strong {
    color: var(--accent-primary);
    font-weight: 700;
}

[data-theme="dark"] .message-bubble strong {
    color: var(--accent-secondary);
}

.message.user .message-bubble strong {
    color: var(--accent-yellow);
}

.message-time {
    font-size: 0.7rem;
    color: var(--text-tertiary);
    padding: 0 var(--spacing-sm);
    font-weight: 500;
}

/* ============================================
   MARK: - Quick Examples
   ============================================ */
.quick-examples {
    margin-top: var(--spacing-md);
    padding-top: var(--spacing-md);
    border-top: 1px solid var(--glass-border);
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
    align-items: center;
}

.example-label {
    font-size: 0.75rem;
    color: var(--text-tertiary);
    width: 100%;
    margin-bottom: var(--spacing-xs);
    font-weight: 600;
}

.example-btn {
    font-family: inherit;
    font-size: 0.8rem;
    font-weight: 600;
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-full);
    color: var(--text-secondary);
    cursor: pointer;
    transition: all var(--transition-fast);
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

.example-btn span {
    font-size: 1rem;
}

.example-btn:hover {
    background: var(--btn-primary-bg);
    border-color: transparent;
    color: var(--btn-primary-text);
    transform: translateY(-2px);
    box-shadow: 0 4px 15px var(--accent-glow);
}

/* ============================================
   MARK: - Typing Indicator
   ============================================ */
.typing-indicator {
    display: none;
    padding: 0 var(--spacing-lg) var(--spacing-md);
    gap: var(--spacing-md);
    align-items: center;
}

.typing-indicator.active {
    display: flex;
}

.typing-dots {
    display: flex;
    gap: 4px;
    padding: var(--spacing-md);
    background: var(--msg-assistant-bg);
    border-radius: var(--radius-lg);
    border: 1px solid var(--msg-assistant-border);
}

.typing-dots span {
    width: 8px;
    height: 8px;
    background: var(--accent-primary);
    border-radius: 50%;
    animation: typingBounce 1.4s ease-in-out infinite;
}

[data-theme="dark"] .typing-dots span {
    background: var(--accent-secondary);
}

.typing-dots span:nth-child(2) {
    animation-delay: 0.2s;
}

.typing-dots span:nth-child(3) {
    animation-delay: 0.4s;
}

@keyframes typingBounce {
    0%, 60%, 100% { transform: translateY(0); }
    30% { transform: translateY(-6px); }
}

/* ============================================
   MARK: - Chat Input
   ============================================ */
.chat-input-container {
    padding: var(--spacing-lg);
    border-top: 1px solid var(--glass-border);
}

.chat-input-wrapper {
    display: flex;
    align-items: flex-end;
    gap: var(--spacing-md);
    padding: var(--spacing-sm) var(--spacing-sm) var(--spacing-sm) var(--spacing-lg);
    border-radius: var(--radius-xl);
    transition: all var(--transition-fast);
}

.chat-input-wrapper:focus-within {
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 3px var(--accent-glow);
}

.chat-input-wrapper textarea {
    flex: 1;
    background: transparent;
    border: none;
    outline: none;
    color: var(--text-primary);
    font-family: inherit;
    font-size: 0.95rem;
    font-weight: 500;
    resize: none;
    max-height: 120px;
    padding: var(--spacing-sm) 0;
}

.chat-input-wrapper textarea::placeholder {
    color: var(--text-tertiary);
}

.send-button {
    width: 44px;
    height: 44px;
    border: none;
    border-radius: var(--radius-md);
    background: var(--btn-primary-bg);
    color: var(--btn-primary-text);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-fast);
    flex-shrink: 0;
}

.send-button:hover {
    transform: scale(1.05);
    box-shadow: 0 4px 20px var(--accent-glow);
}

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

.send-button:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
}

.send-button svg {
    width: 20px;
    height: 20px;
}

.input-hint {
    margin-top: var(--spacing-sm);
    text-align: center;
    font-size: 0.75rem;
    color: var(--text-tertiary);
    font-weight: 500;
}

.input-hint kbd {
    display: inline-block;
    padding: 2px 6px;
    background: var(--bg-tertiary);
    border: 1px solid var(--glass-border);
    border-radius: 4px;
    font-family: inherit;
    font-size: 0.7rem;
    font-weight: 600;
}

/* ============================================
   MARK: - Footer
   ============================================ */
.app-footer {
    text-align: center;
    padding: var(--spacing-lg) var(--spacing-md);
    font-size: 0.8rem;
    color: var(--text-tertiary);
    font-weight: 500;
    animation: fadeIn 1s ease-out 0.4s backwards;
}

.app-footer strong {
    color: var(--accent-primary);
}

[data-theme="dark"] .app-footer strong {
    color: var(--accent-secondary);
}

.footer-hint {
    margin-top: var(--spacing-xs);
    font-size: 0.7rem;
    opacity: 0.7;
}

/* ============================================
   MARK: - Responsive Design
   ============================================ */
@media (max-width: 640px) {
    .app-container {
        padding: var(--spacing-sm);
    }
    
    .app-header {
        padding: var(--spacing-sm) var(--spacing-md);
        border-radius: var(--radius-lg);
    }
    
    .logo-icon {
        width: 40px;
        height: 40px;
    }
    
    .logo-text h1 {
        font-size: 1.3rem;
    }
    
    .header-status span {
        display: none;
    }
    
    .chat-container {
        border-radius: var(--radius-lg);
    }
    
    .chat-messages {
        padding: var(--spacing-md);
        min-height: 300px;
        max-height: 55vh;
    }
    
    .message-content {
        max-width: 85%;
    }
    
    .message-bubble {
        padding: var(--spacing-sm) var(--spacing-md);
    }
    
    .quick-examples {
        flex-direction: column;
        align-items: stretch;
    }
    
    .example-btn {
        justify-content: center;
    }
    
    .chat-input-container {
        padding: var(--spacing-md);
    }
    
    .input-hint {
        display: none;
    }
}

/* ============================================
   MARK: - Animations for Messages
   ============================================ */
.message.assistant .message-bubble {
    animation: bubbleIn 0.3s ease-out;
}

.message.user .message-bubble {
    animation: bubbleInRight 0.3s ease-out;
}

@keyframes bubbleIn {
    from {
        opacity: 0;
        transform: translateX(-10px) scale(0.95);
    }
    to {
        opacity: 1;
        transform: translateX(0) scale(1);
    }
}

@keyframes bubbleInRight {
    from {
        opacity: 0;
        transform: translateX(10px) scale(0.95);
    }
    to {
        opacity: 1;
        transform: translateX(0) scale(1);
    }
}

/* ============================================
   MARK: - Calorie Highlight
   ============================================ */
.calorie-highlight {
    display: inline-block;
    background: linear-gradient(135deg, var(--accent-green), var(--accent-green-light));
    color: white;
    padding: 2px 8px;
    border-radius: var(--radius-sm);
    font-weight: 700;
    font-size: 0.9em;
}

/* ============================================
   MARK: - Theme Transition Overlay
   ============================================ */
.theme-transitioning * {
    transition: none !important;
}