/* ============================================
    IMPORTS & FONTS
    ============================================ */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&display=swap');
@import url('https://fonts.googleapis.com/css2?family=Orbitron:wght@400;500;600;700;900&display=swap');

/* ============================================
    RESET & VARIABLES
    ============================================ */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --bg-primary: #0a0e1a;
    --bg-secondary: #131826;
    --glass-bg: rgba(20, 25, 40, 0.4);
    --glass-border: rgba(255, 255, 255, 0.1);
    --accent: #00d4ff; /* 主 강조色 (cyan) */
    --accent-glow: rgba(0, 212, 255, 0.5);
    --text-primary: #e8eaed;
    --text-secondary: #9aa0a6;
    --message-user: rgba(0, 212, 255, 0.15);
    --message-ai: rgba(255, 255, 255, 0.05);
}

/* ============================================
    BASE STYLES
    ============================================ */
body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background: linear-gradient(135deg, #0a0e1a 0%, #1a1f35 100%);
    color: var(--text-primary);
    height: 100vh;
    overflow: hidden;
    position: relative;
}

/* ============================================
    BACKGROUND EFFECTS
    ============================================ */
/* Starry background */
.stars {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    background-image:
        radial-gradient(2px 2px at 20% 30%, white, transparent),
        radial-gradient(2px 2px at 60% 70%, white, transparent),
        radial-gradient(1px 1px at 50% 50%, white, transparent),
        radial-gradient(1px 1px at 80% 10%, white, transparent),
        radial-gradient(2px 2px at 90% 60%, white, transparent),
        radial-gradient(1px 1px at 33% 75%, white, transparent);
    background-size: 200% 200%;
    opacity: 0.4;
    animation: stars-drift 80s linear infinite;
}

@keyframes stars-drift {
    from { background-position: 0 0; }
    to { background-position: -200% 200%; }
}

/* Neural network sphere */
#neural-sphere {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    z-index: 1;
    opacity: 0.6;
    pointer-events: none;
    filter: blur(1px);
}

/* ============================================
    MAIN CONTAINER
    ============================================ */
.container {
    position: relative;
    z-index: 10;
    height: 100vh;
    display: flex;
    flex-direction: column;
    max-width: 900px;
    margin: 0 auto;
    padding: 2rem;
}

/* ============================================
    LOGO
    ============================================ */
.logo {
    position: relative;
    text-align: center;
    margin-bottom: 2rem;
    opacity: 0;
    animation: fade-in 1s ease forwards;
}

.logo-glow {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 120px;
    height: 120px;
    background: radial-gradient(circle, var(--accent-glow), transparent 70%);
    filter: blur(30px);
    pointer-events: none;
}

.logo span {
    font-size: 2rem;
    font-weight: 300;
    letter-spacing: 8px;
    background: linear-gradient(135deg, var(--accent), #fff);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    position: relative;
    z-index: 2;
}

/* ============================================
    CHAT AREA
    ============================================ */
.chat-area {
    flex: 1;
    overflow-y: auto;
    overflow-x: hidden;
    padding: 1rem;
    margin-bottom: 1.5rem;
    opacity: 0;
    animation: fade-in 1s 0.3s ease forwards;
}

.chat-area::-webkit-scrollbar {
    width: 6px;
}

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

.chat-area::-webkit-scrollbar-thumb {
    background: var(--glass-border);
    border-radius: 3px;
}

.chat-area::-webkit-scrollbar-thumb:hover {
    background: rgba(255, 255, 255, 0.2);
}

/* Welcome message */
.welcome-message {
    text-align: center;
    padding: 3rem 1rem;
    animation: fade-in 1s 0.6s ease forwards;
    opacity: 0;
}

.welcome-message h2 {
    font-size: 2.5rem;
    font-weight: 300;
    margin-bottom: 0.5rem;
    background: linear-gradient(135deg, var(--accent), #fff);
    background-clip: text;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.welcome-message p {
    color: var(--text-secondary);
    font-size: 1.1rem;
    font-weight: 300;
}

.welcome-message .hint {
    margin-top: 1rem;
    font-size: 0.85rem;
    color: var(--text-secondary);
    opacity: 0.7;
}

.welcome-message .hint i {
    color: #00ffff;
    animation: pulse-glow 2s infinite;
}

/* ============================================
    MESSAGES
    ============================================ */
.messages {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.message {
    display: flex;
    gap: 1rem;
    animation: message-appear 0.4s ease;
    opacity: 0;
    animation-fill-mode: forwards;
}

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

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

.message-avatar {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.9rem;
    flex-shrink: 0;
    backdrop-filter: blur(10px);
    border: 1px solid var(--glass-border);
}

.message.user .message-avatar {
    background: var(--message-user);
}

.message.ai .message-avatar {
    background: var(--message-ai);
}

.message-content {
    flex: 1;
    max-width: 75%;
    padding: 1rem 1.5rem;
    border-radius: 16px;
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    border: 1px solid var(--glass-border);
    line-height: 1.6;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.2);
}

.message.user .message-content {
    background: var(--message-user);
    border-color: rgba(0, 212, 255, 0.3);
}

.message.typing {
    opacity: 0.7;
}

/* Typing indicator */
.typing-indicator {
    display: flex;
    gap: 6px;
    padding: 1rem;
}

.typing-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--accent);
    animation: typing-bounce 1.4s infinite;
}

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

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

@keyframes typing-bounce {
    0%, 60%, 100% {
        transform: translateY(0);
    }
    30% {
        transform: translateY(-10px);
    }
}

/* ============================================
    INPUT AREA
    ============================================ */
.input-area {
    opacity: 0;
    animation: fade-in 1s 0.6s ease forwards;
}

.input-wrapper {
    display: flex;
    align-items: flex-end;
    gap: 0.75rem;
    padding: 1rem 1.5rem;
    background: var(--glass-bg);
    backdrop-filter: blur(30px);
    border: 1px solid var(--glass-border);
    border-radius: 24px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
    transition: all 0.3s ease;
}

.input-wrapper:focus-within {
    border-color: var(--accent);
    box-shadow: 0 8px 32px rgba(0, 212, 255, 0.2);
}

#user-input {
    flex: 1;
    background: transparent;
    border: none;
    outline: none;
    color: var(--text-primary);
    font-size: 1rem;
    font-family: inherit;
    resize: none;
    max-height: 120px;
    line-height: 1.5;
}

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

.attach-btn,
.send-btn {
    width: 40px;
    height: 40px;
    border: none;
    background: transparent;
    color: var(--text-secondary);
    cursor: pointer;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
    flex-shrink: 0;
}

.attach-btn:hover,
.send-btn:hover {
    background: rgba(255, 255, 255, 0.1);
    color: var(--accent);
}

.send-btn {
    background: var(--accent);
    color: #000;
}

.send-btn:hover {
    background: #00b8e6;
    transform: scale(1.05);
}

/* Status hint */
.status-hint {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-top: 0.75rem;
    padding-left: 1.5rem;
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.pulse-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--accent);
    animation: pulse 2s ease infinite;
}

@keyframes pulse {
    0%, 100% {
        opacity: 1;
        transform: scale(1);
    }
    50% {
        opacity: 0.5;
        transform: scale(0.8);
    }
}

/* ============================================
    MODE SELECTOR
    ============================================ */
.mode-selector {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 1rem;
    padding: 0 1.5rem;
    opacity: 0;
    animation: fade-in 1s 0.6s ease forwards;
}

.mode-selector label {
    font-size: 0.9rem;
    color: var(--text-secondary);
    white-space: nowrap;
    font-weight: 500;
}

.mode-selector select {
    flex: 1;
    padding: 0.65rem 1rem;
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    border: 1px solid var(--glass-border);
    border-radius: 12px;
    color: var(--text-primary);
    font-size: 0.95rem;
    cursor: pointer;
    transition: all 0.3s ease;
    font-family: inherit;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%2300d4ff' d='M6 9L1 4h10z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 1rem center;
    padding-right: 2.5rem;
}

.mode-selector select:hover {
    border-color: var(--accent);
    background-color: rgba(255, 255, 255, 0.03);
}

.mode-selector select:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 3px rgba(0, 212, 255, 0.1);
}

.mode-selector select option {
    background: var(--bg-secondary);
    color: var(--text-primary);
    padding: 0.5rem;
}

/* Info button */
.info-btn {
    width: 36px;
    height: 36px;
    border: 1px solid var(--glass-border);
    background: var(--glass-bg);
    backdrop-filter: blur(10px);
    color: var(--text-secondary);
    cursor: pointer;
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
    flex-shrink: 0;
}

.info-btn:hover {
    background: rgba(0, 212, 255, 0.1);
    border-color: var(--accent);
    color: var(--accent);
    transform: scale(1.05);
}

/* Mode tooltip */
.mode-tooltip {
    position: relative;
    margin: 0 1.5rem 1rem;
    padding: 1.5rem;
    background: var(--glass-bg);
    backdrop-filter: blur(30px);
    border: 1px solid var(--glass-border);
    border-radius: 16px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
    animation: tooltip-appear 0.3s ease;
}

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

.tooltip-content h3 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.tooltip-content h3:not(:first-child) {
    margin-top: 1.25rem;
}

.tooltip-content p {
    font-size: 0.9rem;
    color: var(--text-secondary);
    line-height: 1.6;
    margin: 0;
}

/* ============================================
    CYBER SIDEBAR
    ============================================ */
.cyber-sidebar {
    position: fixed;
    top: 0;
    right: -420px;
    width: 420px;
    height: 100vh;
    background: linear-gradient(180deg, #0c0d0d, #151515);
    border-left: 2px solid #00ffff;
    z-index: 2000;
    transition: right 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    overflow-y: auto;
    box-shadow: -20px 0 60px rgba(0, 255, 255, 0.3);
    font-family: 'Orbitron', monospace;
}

.cyber-sidebar.active {
    right: 0;
}

.cyber-sidebar::-webkit-scrollbar {
    width: 8px;
}

.cyber-sidebar::-webkit-scrollbar-track {
    background: #0c0d0d;
}

.cyber-sidebar::-webkit-scrollbar-thumb {
    background: #00ffff;
    border-radius: 4px;
}

/* Sidebar header */
.cyber-sidebar-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.5rem;
    border-bottom: 2px solid #00ffff;
    position: sticky;
    top: 0;
    background: #0c0d0d;
    z-index: 10;
}

.cyber-sidebar-header h3 {
    font-size: 1rem;
    font-weight: 700;
    color: #00ffff;
    text-transform: uppercase;
    letter-spacing: 3px;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    text-shadow: 0 0 10px rgba(0, 255, 255, 0.8);
}

.cyber-close-btn {
    width: 36px;
    height: 36px;
    border: 2px solid #ff00ff;
    background: transparent;
    color: #ff00ff;
    border-radius: 4px;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
}

.cyber-close-btn:hover {
    background: #ff00ff;
    color: #000;
    transform: rotate(90deg);
    box-shadow: 0 0 20px rgba(255, 0, 255, 0.8);
}

/* Sidebar content */
.cyber-sidebar-content {
    padding: 1.5rem;
}

.cyber-section {
    margin-bottom: 2rem;
    position: relative;
}

.cyber-section::before {
    content: '';
    position: absolute;
    left: -1.5rem;
    top: 0;
    bottom: 0;
    width: 3px;
    background: linear-gradient(180deg, #00ffff, #ff00ff);
    opacity: 0.5;
}

.cyber-section h4 {
    font-size: 0.75rem;
    font-weight: 700;
    color: #00ffff;
    margin-bottom: 1rem;
    text-transform: uppercase;
    letter-spacing: 2px;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    text-shadow: 0 0 10px rgba(0, 255, 255, 0.6);
}

.cyber-section h4 i {
    font-size: 1rem;
    animation: blink-cyber 2s infinite;
}

@keyframes blink-cyber {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.3; }
}


.cyber-type-card input[type="radio"] {
    position: absolute;
    opacity: 0;
}

.cyber-type-card .cyber-card-content {
    padding: 1rem;
    background: linear-gradient(145deg, #151515, #202222);
    border: 1px solid #2c2c2c;
    border-radius: 4px;
    text-align: center;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.cyber-type-card .cyber-card-content::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 2px;
    background: linear-gradient(90deg, transparent, #00ffff, transparent);
    transition: left 0.5s;
}

.cyber-type-card:hover .cyber-card-content::before {
    left: 100%;
}

.cyber-type-card input:checked + .cyber-card-content {
    border-color: #00ffff;
    box-shadow:
        inset 0 0 20px rgba(0, 255, 255, 0.2),
        0 0 30px rgba(0, 255, 255, 0.4);
    background: linear-gradient(145deg, #202222, #151515);
}

.cyber-type-card .cyber-card-content i {
    font-size: 1.5rem;
    color: #888888;
    margin-bottom: 0.5rem;
    display: block;
    transition: all 0.3s ease;
}

.cyber-type-card input:checked + .cyber-card-content i,
.cyber-type-card:hover .cyber-card-content i {
    color: #00ffff;
    text-shadow: 0 0 15px rgba(0, 255, 255, 0.8);
}

.cyber-type-card .cyber-card-content span {
    font-size: 0.7rem;
    color: #888888;
    font-weight: 600;
    letter-spacing: 1px;
    transition: all 0.3s ease;
}

.cyber-type-card input:checked + .cyber-card-content span {
    color: #00ffff;
}

/* NSTC option highlight (recommended) */
.cyber-type-card input[value="nstc_proposal"]:checked + .cyber-card-content {
    border-color: #00ff88;
    box-shadow:
        inset 0 0 20px rgba(0, 255, 136, 0.2),
        0 0 30px rgba(0, 255, 136, 0.4);
}

.cyber-type-card input[value="nstc_proposal"]:checked + .cyber-card-content i {
    color: #00ff88;
    text-shadow: 0 0 15px rgba(0, 255, 136, 0.8);
}

/* Template select */
.cyber-select {
    width: 100%;
    padding: 0.75rem;
    background: #151515;
    border: 1px solid #2c2c2c;
    border-radius: 4px;
    color: #c7c7c7;
    font-size: 0.85rem;
    font-family: 'Orbitron', monospace;
    cursor: pointer;
    transition: all 0.3s ease;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.cyber-select:hover,
.cyber-select:focus {
    border-color: #00ffff;
    box-shadow: 0 0 10px rgba(0, 255, 255, 0.3);
    outline: none;
}

/* Template preview */
.cyber-template-preview {
    margin-top: 0.75rem;
    padding: 0.75rem;
    background: rgba(0, 255, 255, 0.05);
    border: 1px solid #00ffff;
    border-radius: 4px;
}

.cyber-badge {
    display: inline-block;
    padding: 0.35rem 0.75rem;
    background: #00ffff;
    color: #000;
    border-radius: 2px;
    font-size: 0.7rem;
    font-weight: 700;
    letter-spacing: 1px;
    text-transform: uppercase;
}

/* Options list */
.cyber-options-list {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.cyber-option-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem;
    background: linear-gradient(145deg, #151515, #202222);
    border: 1px solid #2c2c2c;
    border-radius: 4px;
    cursor: pointer;
    transition: all 0.3s ease;
}

.cyber-option-item:hover {
    border-color: #00ffff;
    box-shadow: 0 0 15px rgba(0, 255, 255, 0.2);
}

.cyber-option-item input[type="checkbox"] {
    width: 50px;
    height: 24px;
    appearance: none;
    background: #0c0d0d;
    border: 1px solid #2c2c2c;
    border-radius: 12px;
    position: relative;
    cursor: pointer;
    transition: all 0.3s ease;
    flex-shrink: 0;
}

.cyber-option-item input[type="checkbox"]::before {
    content: '';
    position: absolute;
    width: 20px;
    height: 20px;
    background: #444444;
    border-radius: 50%;
    top: 1px;
    left: 1px;
    transition: all 0.3s ease;
}

.cyber-option-item input[type="checkbox"]:checked {
    background: #00ffff;
    border-color: #00ffff;
    box-shadow: 0 0 15px rgba(0, 255, 255, 0.5);
}

.cyber-option-item input[type="checkbox"]:checked::before {
    transform: translateX(26px);
    background: #000;
}

.cyber-option-item span {
    flex: 1;
    font-size: 0.75rem;
    color: #c7c7c7;
    font-weight: 600;
    letter-spacing: 1px;
    text-transform: uppercase;
}

.cyber-option-item i {
    color: #00ffff;
    font-size: 0.9rem;
}

/* (!! MODIFIED !!) -
   - 舊的 .cyber-file-upload 樣式在 .input-area 中不再需要
   - .cyber-file-upload 樣式在 sidebar 中仍然需要 (用於範本上傳)
   - 所以我們只隱藏 .input-area 中的 .cyber-section
*/
.input-area .cyber-section {
    display: none;
}

/* 範本上傳modal中的樣式 (保留) */
.cyber-file-upload {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1rem;
    background: #151515;
    border: 2px dashed #2c2c2c;
    border-radius: 4px;
    cursor: pointer;
    transition: all 0.3s ease;
}

.cyber-file-upload:hover {
    border-color: #00ffff;
    box-shadow: 0 0 20px rgba(0, 255, 255, 0.2);
}

.cyber-file-upload i {
    font-size: 1.5rem;
    color: #00ffff;
}

.cyber-file-upload span {
    flex: 1;
    font-size: 0.8rem;
    color: #888888;
    font-weight: 600;
    letter-spacing: 1px;
}


/* Settings toggle button */
.cyber-settings-toggle {
    position: absolute;
    top: 50%;
    right: -60px;
    transform: translateY(-50%);
    width: 44px;
    height: 44px;
    border: 2px solid #00ffff;
    background: linear-gradient(145deg, #0a0e1a, #1a1f35);
    color: #00ffff;
    border-radius: 4px;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
}

.cyber-settings-toggle:hover {
    box-shadow: 0 0 30px rgba(0, 255, 255, 0.6);
    transform: translateY(-50%) scale(1.1);
    background: #00ffff;
    color: #000;
}

.cyber-settings-toggle i {
    font-size: 1.3rem;
    animation: rotate-cyber 10s linear infinite;
}

@keyframes rotate-cyber {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

/* ============================================
    CYBER ACTION BUTTONS
    ============================================ */
/* Base cyber button style */
.cyber-action-btn {
    padding: 0.75rem 1.5rem;
    background: linear-gradient(145deg, #0a0e1a, #1a1f35);
    color: #00ffff;
    border: 2px solid #00ffff;
    border-radius: 4px;
    font-weight: 700;
    cursor: pointer;
    transition: all 0.3s ease;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.85rem;
    font-family: 'Orbitron', monospace;
    text-transform: uppercase;
    letter-spacing: 2px;
    position: relative;
    overflow: hidden;
}

/* Animated border effect */
.cyber-action-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 2px;
    background: linear-gradient(90deg, transparent, #00ffff, transparent);
    transition: left 0.5s;
}

.cyber-action-btn:hover::before {
    left: 100%;
}

/* Hover effect */
.cyber-action-btn:hover {
    background: #00ffff;
    color: #000;
    transform: translateY(-2px);
    box-shadow:
        0 0 20px rgba(0, 255, 255, 0.6),
        inset 0 0 20px rgba(0, 255, 255, 0.2);
}

.cyber-action-btn i {
    font-size: 1rem;
    transition: transform 0.3s ease;
}

.cyber-action-btn:hover i {
    transform: scale(1.2);
}

.cyber-action-btn:active i {
    animation: icon-pulse 0.3s ease;
}

@keyframes icon-pulse {
    0%, 100% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.1);
    }
}

/* Preview button variant (cyan) */
.cyber-preview-btn {
    border-color: #00d4ff;
    color: #00d4ff;
}

.cyber-preview-btn:hover {
    background: #00d4ff;
    box-shadow:
        0 0 20px rgba(0, 212, 255, 0.6),
        inset 0 0 20px rgba(0, 212, 255, 0.2);
}

/* Download button variant (green) */
.cyber-download-btn {
    border-color: #00ff88;
    color: #00ff88;
}

.cyber-download-btn:hover {
    background: #00ff88;
    box-shadow:
        0 0 20px rgba(0, 255, 136, 0.6),
        inset 0 0 20px rgba(0, 255, 136, 0.2);
}

/* Refine button variant (purple) */
.cyber-refine-btn {
    border-color: #8800ff;
    color: #8800ff;
}

.cyber-refine-btn:hover {
    background: #8800ff;
    box-shadow:
        0 0 20px rgba(136, 0, 255, 0.6),
        inset 0 0 20px rgba(136, 0, 255, 0.2);
}

/* ============================================
    PREVIEW PANEL
    ============================================ */
.report-preview-panel {
    position: fixed;
    top: 0;
    right: 0;
    width: 50%;
    height: 100vh;
    background: linear-gradient(180deg, rgba(10, 14, 26, 0.98), rgba(19, 24, 38, 0.98));
    backdrop-filter: blur(30px);
    border-left: 1px solid var(--glass-border);
    z-index: 1500;
    display: flex;
    flex-direction: column;
    box-shadow: -10px 0 50px rgba(0, 0, 0, 0.5);
    animation: slide-in-right 0.4s ease;
}

@keyframes slide-in-right {
    from {
        transform: translateX(100%);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

.preview-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.5rem;
    border-bottom: 1px solid var(--glass-border);
    background: rgba(10, 14, 26, 0.95);
    backdrop-filter: blur(20px);
}

.preview-header h3 {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--accent);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.preview-actions {
    display: flex;
    gap: 0.5rem;
}

.action-btn {
    padding: 0.5rem 1rem;
    border: 1px solid var(--glass-border);
    background: var(--glass-bg);
    color: var(--text-secondary);
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.3s ease;
    font-size: 0.85rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.action-btn:hover {
    background: rgba(0, 212, 255, 0.1);
    border-color: var(--accent);
    color: var(--accent);
    transform: translateY(-2px);
}

.close-preview-btn:hover {
    background: rgba(255, 68, 68, 0.1);
    border-color: #ff4444;
    color: #ff4444;
}

.preview-content {
    flex: 1;
    overflow-y: auto;
    padding: 2rem;
    line-height: 1.8;
}

.preview-content::-webkit-scrollbar {
    width: 8px;
}

.preview-content::-webkit-scrollbar-track {
    background: transparent;
}

.preview-content::-webkit-scrollbar-thumb {
    background: var(--glass-border);
    border-radius: 4px;
}

.preview-content::-webkit-scrollbar-thumb:hover {
    background: rgba(255, 255, 255, 0.3);
}

/* Preview content formatting */
.preview-content h1 {
    font-size: 2rem;
    color: var(--text-primary);
    margin-bottom: 1.5rem;
    padding-bottom: 0.5rem;
    border-bottom: 2px solid var(--accent);
}

.preview-content h2 {
    font-size: 1.5rem;
    color: var(--accent);
    margin-top: 2rem;
    margin-bottom: 1rem;
}

.preview-content h3 {
    font-size: 1.2rem;
    color: var(--text-primary);
    margin-top: 1.5rem;
    margin-bottom: 0.75rem;
}

.preview-content p {
    margin-bottom: 1rem;
    color: var(--text-secondary);
}

.preview-content strong {
    color: var(--text-primary);
}

.preview-content em {
    color: var(--accent);
}

/* ============================================
    MODAL
    ============================================ */
.modal {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.8);
    backdrop-filter: blur(10px);
    z-index: 3000;
    display: flex;
    align-items: center;
    justify-content: center;
}

.modal-content {
    background: linear-gradient(145deg, var(--glass-bg), rgba(10, 14, 26, 0.95));
    backdrop-filter: blur(30px);
    border: 1px solid var(--glass-border);
    border-radius: 16px;
    width: 90%;
    max-width: 500px;
    padding: 2rem;
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
}

.modal-header h3 {
    color: var(--accent);
    font-size: 1.2rem;
    font-weight: 600;
}

.close-btn {
    background: transparent;
    border: 1px solid var(--glass-border);
    color: var(--text-secondary);
    cursor: pointer;
    padding: 0.5rem;
    border-radius: 8px;
    transition: all 0.3s ease;
}

.close-btn:hover {
    border-color: var(--accent);
    color: var(--accent);
    transform: rotate(90deg);
}

.modal-body {
    margin-bottom: 1.5rem;
}

.file-upload-label {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1rem;
    background: var(--glass-bg);
    border: 2px dashed var(--glass-border);
    border-radius: 12px;
    cursor: pointer;
    transition: all 0.3s ease;
}

.file-upload-label:hover {
    border-color: var(--accent);
    background: rgba(0, 212, 255, 0.05);
}

.file-upload-label i {
    font-size: 1.5rem;
    color: var(--accent);
}

.modal-footer {
    display: flex;
    justify-content: flex-end;
    gap: 1rem;
}

.btn {
    padding: 0.75rem 1.5rem;
    border: 1px solid var(--glass-border);
    border-radius: 12px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

.primary-btn {
    background: var(--accent);
    color: #000;
    border-color: var(--accent);
}

.primary-btn:hover {
    box-shadow: 0 0 20px var(--accent-glow);
    transform: translateY(-2px);
}

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

.secondary-btn:hover {
    background: var(--glass-bg);
}

/* ============================================
    LOADING OVERLAY
    ============================================ */
.loading-overlay {
    position: fixed;
    inset: 0;
    background: rgba(10, 14, 26, 0.9);
    backdrop-filter: blur(10px);
    z-index: 1000;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 1.5rem;
}

.loading-spinner {
    width: 60px;
    height: 60px;
    border: 3px solid transparent;
    border-top-color: var(--accent);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

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

#loading-text {
    color: var(--text-secondary);
    font-size: 1rem;
}

/* ============================================
    ANIMATIONS
    ============================================ */
@keyframes fade-in {
    to {
        opacity: 1;
    }
}

@keyframes pulse-glow {
    0%, 100% {
        opacity: 1;
        text-shadow: 0 0 5px rgba(0, 212, 255, 0.5);
    }
    50% {
        opacity: 0.6;
        text-shadow: 0 0 10px rgba(0, 212, 255, 0.8);
    }
}

/* ============================================
    RESPONSIVE DESIGN
    ============================================ */
@media (max-width: 1024px) {
    .report-preview-panel {
        width: 70%;
    }
}

@media (max-width: 768px) {
    .container {
        padding: 1rem;
    }

    .logo span {
        font-size: 1.5rem;
        letter-spacing: 6px;
    }

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

    .welcome-message h2 {
        font-size: 2rem;
    }

    .mode-selector {
        flex-wrap: wrap;
    }

    .mode-selector select {
        min-width: 200px;
    }

    .cyber-sidebar {
        width: 100%;
        right: -100%;
    }

    .cyber-settings-toggle {
        right: 1rem;
        top: 1rem;
        transform: none;
    }

    .report-preview-panel {
        width: 100%;
    }
}

@keyframes pulse-border {
    0%, 100% {
        box-shadow: 0 0 20px rgba(0, 255, 255, 0.3);
    }
    50% {
        box-shadow: 0 0 30px rgba(0, 255, 255, 0.6);
    }
}

/* ============================================
    (!! NEW STYLES !!) - UPLOAD ICON & FILE LIST
    ============================================ */

/* 新的 Flex 容器，用於包裹上傳按鈕和輸入框 */
.main-input-row {
    display: flex;
    align-items: flex-end; /* 確保按鈕和輸入框底部對齊 */
    gap: 0.75rem;
    /* 確保它在 mode-selector 下方 */
    margin-top: 1rem;
}

/* 讓 input-wrapper 填滿剩餘空間 */
.main-input-row .input-wrapper {
    flex: 1;
}

/* 新的上傳圖示按鈕樣式 */
.cyber-file-upload-icon {
    position: relative; /* 為了徽章定位 */
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background: var(--glass-bg);
    backdrop-filter: blur(30px);
    border: 1px solid var(--glass-border);
    border-radius: 12px;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all 0.3s ease;
    font-size: 1.1rem;
    flex-shrink: 0; /* 防止按鈕被壓縮 */

    /* 關鍵：使其與 send-btn 對齊 (input-wrapper 的 padding-bottom 是 1rem) */
    margin-bottom: 1rem;
}

.cyber-file-upload-icon:hover {
    border-color: var(--accent);
    color: var(--accent);
    box-shadow: 0 0 15px var(--accent-glow);
}

/* (!! MODIFIED !!) - 檔案計數徽章 (Just the number, styled) */
.file-count-badge {
    position: absolute;
    top: -10px;  /* 微調位置 */
    right: -6px; /* 微調位置 */
    background: transparent; /* 無背景 */
    color: var(--accent); /* 使用強調色 */
    border-radius: 0;
    width: auto;
    height: auto;
    display: block;
    font-size: 1.1rem; /* 稍微縮小一點 */
    font-weight: 700; /* 不需過粗 */
    font-family: 'Orbitron', monospace;
    text-shadow: 0 0 8px var(--accent-glow); /* 使用強調色的光暈 */
    border: none;
    box-shadow: none;
    line-height: 1; /* 確保數字垂直置中 */
}

/* 檔案清單的新樣式 (在輸入框下方) */
.cyber-file-list {
    background: rgba(0, 0, 0, 0.2);
    border-left: 3px solid var(--accent);
    padding: 0.5rem 1rem;
    animation: fade-in 0.3s ease;
}

.cyber-file-list-item {
    font-size: 0.8rem;
    color: #00ffff;
    margin: 0.35rem 0;
    font-family: 'Orbitron', monospace;
    letter-spacing: 0.5px;
}

.cyber-file-list-item::before {
    content: 'FILE:: ';
    color: var(--text-secondary);
    opacity: 0.7;
}