/* ==========================================================================
   Base Styles & Variables
   ========================================================================== */
:root {
    --bg-primary: #090b11;
    --bg-secondary: #131622;
    --bg-glass: rgba(22, 27, 45, 0.65);
    --border-glass: rgba(255, 255, 255, 0.08);
    --border-glass-focus: rgba(124, 58, 237, 0.4);
    
    --text-primary: #f3f4f6;
    --text-secondary: #9ca3af;
    --text-muted: #6b7280;
    
    --color-primary: #8b5cf6;
    --color-primary-hover: #7c3aed;
    --color-secondary: #06b6d4;
    --color-secondary-hover: #0891b2;
    --color-accent: #f43f5e;
    --color-success: #10b981;
    
    --neon-shadow: 0 0 15px rgba(139, 92, 246, 0.35);
    --neon-blue-shadow: 0 0 15px rgba(6, 182, 212, 0.35);
    --glass-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.37);
    
    --font-main: 'Outfit', 'Noto Sans KR', sans-serif;
    --transition-smooth: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

body {
    background-color: var(--bg-primary);
    color: var(--text-primary);
    font-family: var(--font-main);
    overflow-x: hidden;
    height: 100vh;
}

/* ==========================================================================
   App Layout
   ========================================================================== */
.app-container {
    display: flex;
    height: 100vh;
    width: 100vw;
    background: radial-gradient(circle at 80% 20%, rgba(124, 58, 237, 0.15) 0%, transparent 50%),
                radial-gradient(circle at 10% 80%, rgba(6, 182, 212, 0.1) 0%, transparent 50%);
}

/* Sidebar Styling */
.sidebar {
    width: 280px;
    background-color: var(--bg-secondary);
    border-right: 1px solid var(--border-glass);
    display: flex;
    flex-direction: column;
    padding: 24px 0;
    flex-shrink: 0;
}

.logo-area {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 0 24px 24px 24px;
    border-bottom: 1px solid var(--border-glass);
}

.logo-icon {
    font-size: 1.8rem;
    background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    filter: drop-shadow(0 2px 8px rgba(139, 92, 246, 0.4));
}

.logo-area h2 {
    font-size: 1.4rem;
    font-weight: 800;
    letter-spacing: -0.5px;
    background: linear-gradient(to right, #ffffff, #c084fc);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

/* Sidebar Selected Artist Style Box */
.selected-artist-style-box {
    margin: 10px 16px 20px 16px;
    padding: 16px;
    background-color: rgba(255, 255, 255, 0.02);
    border: 1px solid var(--border-glass);
    border-radius: 12px;
    display: flex;
    flex-direction: column;
    gap: 12px;
    animation: fadeIn 0.4s ease-out;
}

body.light-mode .selected-artist-style-box {
    background-color: rgba(15, 23, 42, 0.02);
    border-color: rgba(0, 0, 0, 0.08);
}

.artist-style-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.artist-style-header span {
    font-size: 0.75rem;
    font-weight: 700;
    color: var(--color-secondary);
    letter-spacing: 0.5px;
    text-transform: uppercase;
    display: flex;
    align-items: center;
    gap: 6px;
}

body.light-mode .artist-style-header span {
    color: var(--color-primary);
}

#btn-clear-artist-style {
    background: transparent;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    font-size: 1rem;
    padding: 2px 6px;
    border-radius: 4px;
    transition: var(--transition-smooth);
    display: flex;
    align-items: center;
    justify-content: center;
}

#btn-clear-artist-style:hover {
    color: var(--color-accent);
    background-color: rgba(244, 63, 94, 0.1);
}

.artist-style-img {
    width: 100%;
    height: auto;
    max-height: 380px;
    object-fit: contain;
    border-radius: 8px;
    border: 1px solid rgba(255, 255, 255, 0.05);
}

body.light-mode .artist-style-img {
    border-color: rgba(0, 0, 0, 0.05);
}

.steps-nav {
    flex-grow: 1;
    overflow-y: auto;
    padding: 24px 16px;
}

.steps-nav ul {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.nav-item {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 12px 16px;
    border-radius: 12px;
    cursor: pointer;
    transition: var(--transition-smooth);
    border: 1px solid transparent;
}

.nav-item:hover {
    background-color: rgba(255, 255, 255, 0.03);
    border-color: rgba(255, 255, 255, 0.05);
}

.nav-item.active {
    background: linear-gradient(135deg, rgba(139, 92, 246, 0.15), rgba(6, 182, 212, 0.05));
    border-color: rgba(139, 92, 246, 0.3);
    box-shadow: inset 0 0 12px rgba(139, 92, 246, 0.1);
}

.nav-item.completed {
    border-color: rgba(16, 185, 129, 0.2);
}

.step-num {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-muted);
    transition: var(--transition-smooth);
}

.nav-item.active .step-num {
    color: var(--color-secondary);
}

.nav-item.completed .step-num {
    color: var(--color-success);
}

.step-title {
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--text-secondary);
    transition: var(--transition-smooth);
}

.nav-item.active .step-title {
    color: var(--text-primary);
    font-weight: 600;
}

.sidebar-footer {
    padding: 20px 24px 0 24px;
    border-top: 1px solid var(--border-glass);
}

/* Workspace Styling */
.workspace {
    flex-grow: 1;
    display: flex;
    flex-direction: column;
    height: 100%;
    overflow: hidden;
}

.main-header {
    padding: 30px 40px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid var(--border-glass);
    position: relative;
}

.header-info h1 {
    font-size: 1.8rem;
    font-weight: 800;
    margin-bottom: 6px;
    letter-spacing: -0.5px;
}

.header-info p {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

.progress-container {
    position: absolute;
    bottom: -1px;
    left: 0;
    width: 100%;
    height: 2px;
    background-color: rgba(255, 255, 255, 0.05);
}

.progress-bar {
    height: 100%;
    width: 10%;
    background: linear-gradient(to right, var(--color-primary), var(--color-secondary));
    box-shadow: 0 0 10px rgba(139, 92, 246, 0.8);
    transition: width 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Workspace Content Grid */
.workspace-content {
    display: grid;
    grid-template-columns: 1.2fr 0.8fr;
    flex-grow: 1;
    overflow: hidden;
}

/* ==========================================================================
   Form Section & Step Cards
   ========================================================================== */
.form-section {
    padding: 40px;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    height: 100%;
}

.step-card {
    display: none;
    animation: fadeIn 0.4s ease-in-out;
}

.step-card.active {
    display: block;
}

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

.card-header {
    margin-bottom: 30px;
}

.badge {
    background: linear-gradient(135deg, rgba(139, 92, 246, 0.2), rgba(6, 182, 212, 0.2));
    border: 1px solid rgba(139, 92, 246, 0.4);
    color: #c084fc;
    padding: 4px 12px;
    border-radius: 30px;
    font-size: 0.8rem;
    font-weight: 600;
    letter-spacing: 0.5px;
    display: inline-block;
    margin-bottom: 12px;
}

.card-header h2 {
    font-size: 1.6rem;
    font-weight: 700;
    margin-bottom: 8px;
}

.card-header p {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

.card-body {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.scrollable-card-body {
    max-height: calc(100vh - 300px);
    min-height: 380px;
    overflow-y: auto;
    padding-right: 10px;
}

/* Form Controls */
.form-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.form-row {
    display: flex;
    gap: 20px;
}

.form-group.col {
    flex: 1;
}

label {
    font-size: 0.98rem;
    font-weight: 700;
    color: var(--text-primary);
    letter-spacing: -0.2px;
    display: inline-flex;
    align-items: center;
}

.form-control {
    background-color: rgba(255, 255, 255, 0.04);
    border: 1px solid rgba(255, 255, 255, 0.12);
    border-radius: 10px;
    padding: 12px 18px;
    color: #ffffff;
    font-family: var(--font-main);
    font-size: 1rem;
    transition: var(--transition-smooth);
    outline: none;
}

.form-control::placeholder {
    color: var(--text-muted);
    opacity: 0.7;
}

.form-control:focus {
    background-color: rgba(0, 0, 0, 0.2);
    border-color: var(--color-secondary);
    box-shadow: var(--neon-blue-shadow);
}

textarea.form-control {
    resize: none;
}

/* Suggestion Tags */
.tags-suggest {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-top: 6px;
}

.tag {
    background-color: rgba(255, 255, 255, 0.04);
    border: 1px solid var(--border-glass);
    color: var(--text-secondary);
    padding: 6px 12px;
    border-radius: 8px;
    font-size: 0.85rem;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition-smooth);
}

.tag:hover {
    background-color: rgba(139, 92, 246, 0.1);
    border-color: rgba(139, 92, 246, 0.4);
    color: #d8b4fe;
    box-shadow: var(--neon-shadow);
    transform: translateY(-1px);
}

.tag.selected {
    background-color: rgba(139, 92, 246, 0.2) !important;
    border-color: var(--color-primary) !important;
    color: #e9d5ff !important;
    box-shadow: 0 0 10px rgba(139, 92, 246, 0.4);
    font-weight: 700;
}

body.light-mode .tag.selected {
    background-color: rgba(139, 92, 246, 0.1) !important;
    border-color: var(--color-primary) !important;
    color: var(--color-primary) !important;
    box-shadow: 0 0 8px rgba(139, 92, 246, 0.25);
}

/* Navigation Footer */
.nav-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: 40px;
    padding-top: 24px;
    border-top: 1px solid var(--border-glass);
}

.step-indicator {
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--text-secondary);
}

#current-step-indicator {
    color: var(--color-secondary);
    font-size: 1.1rem;
}

/* ==========================================================================
   Buttons
   ========================================================================== */
.btn-primary {
    background: linear-gradient(135deg, var(--color-primary), var(--color-primary-hover));
    color: white;
    border: none;
    border-radius: 12px;
    padding: 12px 24px;
    font-family: var(--font-main);
    font-weight: 600;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    transition: var(--transition-smooth);
    box-shadow: 0 4px 12px rgba(139, 92, 246, 0.3);
}

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

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

.btn-secondary {
    background-color: rgba(255, 255, 255, 0.05);
    color: var(--text-primary);
    border: 1px solid var(--border-glass);
    border-radius: 12px;
    padding: 12px 24px;
    font-family: var(--font-main);
    font-weight: 600;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    transition: var(--transition-smooth);
}

.btn-secondary:hover {
    background-color: rgba(255, 255, 255, 0.08);
    border-color: rgba(255, 255, 255, 0.2);
}

.btn-secondary:disabled, .btn-primary:disabled {
    opacity: 0.4;
    cursor: not-allowed;
    transform: none !important;
    box-shadow: none !important;
}

.btn-danger {
    background-color: rgba(239, 68, 68, 0.1);
    color: #f87171;
    border: 1px solid rgba(239, 68, 68, 0.3);
    border-radius: 12px;
    padding: 12px 24px;
    font-family: var(--font-main);
    font-weight: 600;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    transition: var(--transition-smooth);
}

.btn-danger:hover {
    background-color: rgba(239, 68, 68, 0.2);
    border-color: rgba(239, 68, 68, 0.5);
    transform: translateY(-2px);
}

.btn-block {
    width: 100%;
}

.btn-small-secondary {
    background-color: rgba(255, 255, 255, 0.05);
    color: var(--text-secondary);
    border: 1px solid var(--border-glass);
    border-radius: 6px;
    padding: 6px 12px;
    font-size: 0.8rem;
    font-family: var(--font-main);
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    white-space: nowrap;
    transition: var(--transition-smooth);
}

.btn-small-secondary:hover {
    background-color: rgba(139, 92, 246, 0.1);
    border-color: rgba(139, 92, 246, 0.3);
    color: var(--text-primary);
}

/* ==========================================================================
   Preview Section
   ========================================================================== */
.preview-section {
    padding: 24px;
    border-left: 1px solid var(--border-glass);
    background-color: rgba(255, 255, 255, 0.01);
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.preview-card {
    background-color: var(--bg-glass);
    border: 1px solid var(--border-glass);
    border-radius: 16px;
    height: 100%;
    display: flex;
    flex-direction: column;
    box-shadow: var(--glass-shadow);
    backdrop-filter: blur(16px);
    overflow: hidden;
}

.preview-header {
    padding: 16px 20px;
    border-bottom: 1px solid var(--border-glass);
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 12px;
}

.preview-header h3 {
    font-size: 1.1rem;
    font-weight: 700;
    display: flex;
    align-items: center;
    gap: 8px;
    white-space: nowrap;
}

.preview-header h3 i {
    color: var(--color-secondary);
}

.preview-body {
    flex-grow: 1;
    padding: 28px;
    overflow-y: auto;
    font-family: 'Noto Serif KR', 'NanumMyeongjo', 'Batang', serif;
    font-weight: 700;
    font-size: 0.95rem;
    line-height: 1.75;
    letter-spacing: -0.4px;
    white-space: pre-wrap;
    background-color: rgba(0, 0, 0, 0.25);
    color: #e2e8f0;
}

.preview-body .highlight-token {
    color: #22d3ee;
    font-weight: 700;
    background-color: rgba(6, 182, 212, 0.15);
    padding: 3px 8px;
    border-radius: 6px;
    border: 1px solid rgba(6, 182, 212, 0.35);
    display: inline-block;
    margin: 2px 0;
    box-shadow: 0 0 8px rgba(6, 182, 212, 0.1);
}

.preview-body .empty-token {
    color: #f59e0b;
    font-weight: 600;
    background-color: rgba(245, 158, 11, 0.08);
    padding: 3px 8px;
    border-radius: 6px;
    border: 1px dashed rgba(245, 158, 11, 0.35);
    display: inline-block;
    margin: 2px 0;
}

.preview-section-header {
    color: var(--color-secondary);
    font-weight: 700;
    font-size: 0.95rem;
    margin-top: 24px;
    margin-bottom: 8px;
    padding-bottom: 4px;
    border-bottom: 1px solid rgba(6, 182, 212, 0.25);
    display: block;
    letter-spacing: 0.5px;
}

/* ==========================================================================
   Output Screen Specifics
   ========================================================================== */
.output-options {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
    margin-bottom: 20px;
}

.output-preview-container {
    flex-grow: 1;
    display: flex;
    flex-direction: column;
}

.final-output-area {
    width: 100%;
    height: 380px !important;
    font-family: 'Noto Serif KR', 'NanumMyeongjo', 'Batang', serif;
    font-weight: 700;
    font-size: 0.92rem;
    line-height: 1.6;
    letter-spacing: -0.4px;
    background-color: rgba(0, 0, 0, 0.3);
    border: 1px solid var(--border-glass-focus);
    box-shadow: inset 0 0 10px rgba(0,0,0,0.5);
    padding: 20px;
    border-radius: 12px;
}

/* ==========================================================================
   Toast Notification System
   ========================================================================== */
#toast-container {
    position: fixed;
    bottom: 30px;
    right: 30px;
    z-index: 9999;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.toast {
    background-color: rgba(22, 27, 45, 0.9);
    backdrop-filter: blur(10px);
    color: var(--text-primary);
    padding: 16px 24px;
    border-radius: 10px;
    display: flex;
    align-items: center;
    gap: 12px;
    min-width: 300px;
    transform: translateX(120%);
    transition: transform 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.toast.show {
    transform: translateX(0);
}

.toast i {
    font-size: 1.2rem;
}

/* Toast Variant Styles */
.toast-success {
    border: 1px solid var(--color-success);
    box-shadow: 0 4px 20px rgba(16, 185, 129, 0.2);
}
.toast-success i {
    color: var(--color-success);
}

.toast-error {
    border: 1px solid var(--color-accent);
    box-shadow: 0 4px 20px rgba(244, 63, 94, 0.2);
}
.toast-error i {
    color: var(--color-accent);
}

.toast-info {
    border: 1px solid var(--color-secondary);
    box-shadow: 0 4px 20px rgba(6, 182, 212, 0.2);
}
.toast-info i {
    color: var(--color-secondary);
}

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

::-webkit-scrollbar-track {
    background: rgba(255, 255, 255, 0.01);
}

::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.1);
    border-radius: 4px;
}

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

/* ==========================================================================
   Purpose Selector (Step 1)
   ========================================================================== */
.purpose-selector-group {
    margin-bottom: 24px;
}

.purpose-cards-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
    margin-top: 12px;
}

.purpose-select-card {
    background-color: rgba(255, 255, 255, 0.02);
    border: 1px solid var(--border-glass);
    border-radius: 14px;
    padding: 20px;
    cursor: pointer;
    position: relative;
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 14px;
    transition: var(--transition-smooth);
}

.purpose-select-card:hover {
    background-color: rgba(139, 92, 246, 0.05);
    border-color: rgba(139, 92, 246, 0.3);
    transform: translateY(-3px);
    box-shadow: 0 8px 24px rgba(139, 92, 246, 0.1);
}

.purpose-select-card.selected {
    background: linear-gradient(135deg, rgba(139, 92, 246, 0.15), rgba(6, 182, 212, 0.05));
    border-color: var(--color-primary);
    box-shadow: var(--neon-shadow);
}

.purpose-card-icon {
    width: 44px;
    height: 44px;
    border-radius: 10px;
    background-color: rgba(255, 255, 255, 0.04);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.3rem;
    color: var(--color-secondary);
    transition: var(--transition-smooth);
}

.purpose-select-card.selected .purpose-card-icon {
    background-color: var(--color-primary);
    color: white;
    box-shadow: 0 0 10px rgba(139, 92, 246, 0.5);
}

.purpose-card-info h4 {
    font-size: 1.05rem;
    font-weight: 700;
    margin-bottom: 6px;
    color: var(--text-primary);
}

.purpose-card-info p {
    font-size: 0.8rem;
    color: var(--text-secondary);
    line-height: 1.4;
}

.purpose-check {
    position: absolute;
    top: 16px;
    right: 16px;
    font-size: 1.1rem;
    color: var(--text-muted);
    opacity: 0;
    transform: scale(0.7);
    transition: var(--transition-smooth);
}

.purpose-select-card.selected .purpose-check {
    color: var(--color-secondary);
    opacity: 1;
    transform: scale(1);
}

.divider {
    height: 1px;
    background-color: var(--border-glass);
    margin: 30px 0;
}

/* Required field indicator & special 'None' tag styles */
.required-mark {
    color: var(--color-accent);
    margin-left: 4px;
    font-weight: 800;
}

/* Input Validation Error Animation & Styles */
.form-control.input-error {
    border-color: var(--color-accent) !important;
    box-shadow: 0 0 15px rgba(244, 63, 94, 0.4) !important;
    animation: shakeInput 0.5s cubic-bezier(.36,.07,.19,.97) both;
}

@keyframes shakeInput {
    10%, 90% { transform: translate3d(-1px, 0, 0); }
    20%, 80% { transform: translate3d(2px, 0, 0); }
    30%, 50%, 70% { transform: translate3d(-4px, 0, 0); }
    40%, 60% { transform: translate3d(4px, 0, 0); }
}

/* ==========================================================================
   Theme Switcher & Light Mode Support
   ========================================================================== */
body {
    transition: background-color 0.3s ease, color 0.3s ease;
}

.btn-theme-toggle {
    background-color: rgba(255, 255, 255, 0.04);
    border: 1px solid var(--border-glass);
    color: var(--text-primary);
    width: 44px;
    height: 44px;
    border-radius: 12px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.15rem;
    transition: var(--transition-smooth);
    margin-left: 20px;
    flex-shrink: 0;
}

.btn-theme-toggle:hover {
    background-color: rgba(255, 255, 255, 0.1);
    border-color: rgba(255, 255, 255, 0.2);
    transform: rotate(15deg) scale(1.05);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

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

/* Light Mode Variables Override */
body.light-mode {
    --bg-primary: #f8fafc;
    --bg-secondary: #ffffff;
    --bg-glass: rgba(255, 255, 255, 0.85);
    --border-glass: rgba(0, 0, 0, 0.08);
    --border-glass-focus: rgba(124, 58, 237, 0.4);
    
    --text-primary: #0f172a;
    --text-secondary: #475569;
    --text-muted: #94a3b8;
    
    --color-primary: #7c3aed;
    --color-primary-hover: #6d28d9;
    --color-secondary: #0891b2;
    --color-secondary-hover: #0e7490;
    
    --neon-shadow: 0 4px 20px rgba(124, 58, 237, 0.12);
    --neon-blue-shadow: 0 4px 20px rgba(8, 145, 178, 0.12);
    --glass-shadow: 0 8px 32px 0 rgba(15, 23, 42, 0.06);
}

body.light-mode .app-container {
    background: radial-gradient(circle at 80% 20%, rgba(124, 58, 237, 0.05) 0%, transparent 50%),
                radial-gradient(circle at 10% 80%, rgba(6, 182, 212, 0.04) 0%, transparent 50%);
}

body.light-mode .btn-theme-toggle {
    background-color: rgba(15, 23, 42, 0.04);
}

body.light-mode .btn-theme-toggle:hover {
    background-color: rgba(15, 23, 42, 0.08);
}

body.light-mode .form-control {
    background-color: #ffffff;
    border: 1px solid rgba(0, 0, 0, 0.15);
    color: #0f172a;
}

body.light-mode .form-control:focus {
    background-color: #ffffff;
    border-color: var(--color-primary);
    box-shadow: 0 0 10px rgba(124, 58, 237, 0.2);
}

body.light-mode .tag {
    background-color: rgba(15, 23, 42, 0.03);
    border: 1px solid var(--border-glass);
    color: var(--text-secondary);
}

body.light-mode .tag:hover {
    background-color: rgba(124, 58, 237, 0.08);
    border-color: rgba(124, 58, 237, 0.08);
    color: var(--color-primary);
    box-shadow: none;
}

body.light-mode .preview-body {
    background-color: #f8fafc;
    color: #334155;
    border-left: 1px solid rgba(0, 0, 0, 0.06);
}

body.light-mode .preview-body .highlight-token {
    color: #0891b2;
    background-color: rgba(8, 145, 178, 0.08);
    border-color: rgba(8, 145, 178, 0.25);
    box-shadow: none;
}

body.light-mode .preview-body .empty-token {
    color: #b45309;
    background-color: rgba(180, 83, 9, 0.04);
    border-color: rgba(180, 83, 9, 0.25);
}

body.light-mode .preview-section-header {
    color: var(--color-primary);
    border-bottom-color: rgba(124, 58, 237, 0.2);
}

body.light-mode .final-output-area {
    background-color: #f8fafc;
}

body.light-mode .sidebar {
    background-color: #f1f5f9;
}

body.light-mode .logo-area h2 {
    background: linear-gradient(to right, var(--text-primary), var(--color-primary));
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

body.light-mode .logo-icon {
    filter: drop-shadow(0 2px 6px rgba(124, 58, 237, 0.25));
}

body.light-mode .nav-item:hover {
    background-color: rgba(15, 23, 42, 0.02);
}

body.light-mode .nav-item.active {
    background: linear-gradient(135deg, rgba(124, 58, 237, 0.08), rgba(8, 145, 178, 0.03));
}

body.light-mode .btn-secondary {
    background-color: #ffffff;
    border-color: rgba(0, 0, 0, 0.1);
}

body.light-mode .btn-secondary:hover {
    background-color: #f8fafc;
}

body.light-mode .purpose-select-card {
    background-color: rgba(0, 0, 0, 0.01);
}

body.light-mode .purpose-select-card:hover {
    background-color: rgba(124, 58, 237, 0.03);
}

body.light-mode .purpose-card-icon {
    background-color: rgba(0, 0, 0, 0.03);
}

body.light-mode .purpose-select-card.selected {
    background: linear-gradient(135deg, rgba(124, 58, 237, 0.08), rgba(8, 145, 178, 0.03));
}

body.light-mode .purpose-select-card.selected .purpose-card-icon {
    background-color: var(--color-primary);
    color: white;
}

/* Light Mode Overrides for Toast Notifications */
body.light-mode .toast {
    background-color: rgba(255, 255, 255, 0.98);
    color: var(--text-primary);
}

body.light-mode .toast-success {
    box-shadow: 0 10px 30px rgba(15, 23, 42, 0.08), 0 4px 20px rgba(16, 185, 129, 0.15);
}

body.light-mode .toast-error {
    box-shadow: 0 10px 30px rgba(15, 23, 42, 0.08), 0 4px 20px rgba(244, 63, 94, 0.15);
}

body.light-mode .toast-info {
    box-shadow: 0 10px 30px rgba(15, 23, 42, 0.08), 0 4px 20px rgba(6, 182, 212, 0.15);
}

/* ==========================================================================
   Sidebar Hashtags (Bottom Left)
   ========================================================================== */
.hashtag-container {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    margin-bottom: 16px;
    padding: 0 4px;
}

.hash-tag {
    font-size: 0.75rem;
    font-weight: 500;
    color: var(--text-secondary);
    background-color: rgba(255, 255, 255, 0.02);
    border: 1px solid var(--border-glass);
    padding: 4px 10px;
    border-radius: 30px;
    transition: var(--transition-smooth);
    cursor: default;
    user-select: none;
}

.hash-tag:hover {
    color: var(--text-primary);
    border-color: var(--color-primary);
    background-color: rgba(139, 92, 246, 0.08);
    box-shadow: 0 2px 8px rgba(139, 92, 246, 0.15);
    transform: translateY(-1px);
}

body.light-mode .hash-tag {
    background-color: rgba(15, 23, 42, 0.02);
}

body.light-mode .hash-tag:hover {
    background-color: rgba(124, 58, 237, 0.06);
    border-color: var(--color-primary);
    box-shadow: 0 2px 8px rgba(124, 58, 237, 0.1);
}

/* ==========================================================================
   Image/Video Mode Toggle & GenMode Switcher Styles (Standardized 38px Height)
   ========================================================================== */
.title-with-toggle {
    display: flex;
    align-items: center;
    gap: 14px;
    margin-bottom: 8px;
}

.title-with-toggle h1 {
    margin-bottom: 0 !important;
}

.mode-toggle-group {
    display: inline-flex;
    align-items: center;
    height: 38px;
    background-color: rgba(255, 255, 255, 0.03);
    padding: 3px;
    border-radius: 10px;
    border: 1px solid var(--border-glass);
    box-sizing: border-box;
}

.btn-mode {
    height: 100%;
    padding: 0 14px;
    border-radius: 7px;
    border: none;
    font-size: 0.85rem;
    font-weight: 600;
    font-family: var(--font-main);
    cursor: pointer;
    background: transparent;
    color: var(--text-secondary);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    transition: var(--transition-smooth);
    box-sizing: border-box;
    line-height: 1;
}

.btn-mode:hover {
    color: var(--text-primary);
    background-color: rgba(255, 255, 255, 0.04);
}

.btn-mode.active {
    background: linear-gradient(135deg, var(--color-primary), var(--color-primary-hover));
    color: white;
    box-shadow: var(--neon-shadow);
}

/* Light mode support for mode switch */
body.light-mode .mode-toggle-group {
    background-color: rgba(0, 0, 0, 0.03);
    border-color: rgba(0, 0, 0, 0.08);
}
body.light-mode .btn-mode {
    color: var(--text-secondary);
}
body.light-mode .btn-mode.active {
    background: linear-gradient(135deg, var(--color-primary), var(--color-primary-hover));
    color: white;
}

/* ==========================================================================
   Premium Tooltip styles for Suggestion Tags (Glassmorphism & Fade-in)
   ========================================================================== */
.tag {
    position: relative;
}

.tag[data-tooltip]::after {
    content: attr(data-tooltip);
    position: absolute;
    bottom: 130%;
    left: 50%;
    transform: translateX(-50%) scale(0.9);
    background: rgba(15, 23, 42, 0.96);
    color: #e2e8f0;
    padding: 10px 14px;
    border-radius: 8px;
    font-size: 0.75rem;
    font-weight: 400;
    line-height: 1.5;
    white-space: normal;
    width: 250px;
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.4);
    border: 1px solid rgba(255, 255, 255, 0.1);
    opacity: 0;
    pointer-events: none;
    transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
    z-index: 1000;
    text-align: left;
    backdrop-filter: blur(10px);
}

.tag[data-tooltip]::before {
    content: '';
    position: absolute;
    bottom: 118%;
    left: 50%;
    transform: translateX(-50%);
    border-width: 6px;
    border-style: solid;
    border-color: rgba(15, 23, 42, 0.96) transparent transparent transparent;
    opacity: 0;
    pointer-events: none;
    transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
    z-index: 1000;
}

.tag[data-tooltip]:hover::after {
    opacity: 1;
    transform: translateX(-50%) scale(1);
}

.tag[data-tooltip]:hover::before {
    opacity: 1;
}

/* Light mode support for tooltip */
body.light-mode .tag[data-tooltip]::after {
    background: rgba(255, 255, 255, 0.98);
    color: #1e293b;
    border: 1px solid rgba(0, 0, 0, 0.1);
    box-shadow: 0 8px 30px rgba(15, 23, 42, 0.15);
}

body.light-mode .tag[data-tooltip]::before {
    border-color: rgba(255, 255, 255, 0.98) transparent transparent transparent;
}

/* ==========================================================================
   Field Example Guide Text Block (Enhanced Visibility)
   ========================================================================== */
.field-example-guide {
    font-size: 0.88rem;
    font-weight: 500;
    color: #d8b4fe;
    margin-top: 6px;
    margin-bottom: 12px;
    padding: 10px 14px;
    background-color: rgba(139, 92, 246, 0.15);
    border-radius: 8px;
    border-left: 4px solid var(--color-primary);
    display: flex;
    align-items: center;
    gap: 8px;
    width: 100%;
    box-sizing: border-box;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
    transition: var(--transition-smooth);
}

.field-example-guide i {
    color: #c084fc;
    font-size: 0.95rem;
    flex-shrink: 0;
}

body.light-mode .field-example-guide {
    background-color: rgba(124, 58, 237, 0.06);
    color: #5b21b6;
    border-left-color: var(--color-primary);
    box-shadow: 0 2px 6px rgba(124, 58, 237, 0.05);
}

body.light-mode .field-example-guide i {
    color: var(--color-primary);
}

/* ==========================================================================
   Preset Selector UI (Quick Presets)
   ========================================================================== */
.purpose-selector-container {
    background: linear-gradient(135deg, rgba(124, 58, 237, 0.08), rgba(6, 182, 212, 0.08));
    border: 1px solid var(--border-glass-focus);
    border-radius: 12px;
    padding: 16px 20px;
    margin-bottom: 20px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.05);
}

body.light-mode .purpose-selector-container {
    background: linear-gradient(135deg, rgba(124, 58, 237, 0.04), rgba(6, 182, 212, 0.04));
    border-color: rgba(0, 0, 0, 0.08);
}

.purpose-selector-label {
    font-size: 0.95rem;
    font-weight: 700;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 12px;
    margin-top: 0;
}

.purpose-selector-label i {
    color: var(--color-primary);
}
.preset-selector-container {
    background: linear-gradient(135deg, rgba(124, 58, 237, 0.1), rgba(6, 182, 212, 0.1));
    border: 1px solid var(--border-glass-focus);
    border-radius: 12px;
    padding: 14px 20px;
    margin-bottom: 20px;
    display: flex;
    align-items: center;
    gap: 16px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.05);
}

body.light-mode .preset-selector-container {
    background: linear-gradient(135deg, rgba(124, 58, 237, 0.05), rgba(6, 182, 212, 0.05));
    border-color: rgba(0, 0, 0, 0.08);
}

.preset-selector-container label {
    font-size: 0.95rem;
    font-weight: 700;
    color: var(--text-primary);
    white-space: nowrap;
    display: flex;
    align-items: center;
    gap: 8px;
    margin: 0;
}

.preset-selector-container label i {
    color: var(--color-secondary);
}

.preset-select {
    flex-grow: 1;
    background-color: rgba(0, 0, 0, 0.3) !important;
    border: 1px solid var(--border-glass) !important;
    color: var(--text-primary) !important;
    border-radius: 8px !important;
    padding: 8px 12px !important;
    font-size: 0.9rem !important;
    cursor: pointer;
    transition: all 0.3s ease;
}

body.light-mode .preset-select {
    background-color: #ffffff !important;
    border-color: #cbd5e1 !important;
    color: #0f172a !important;
}

.preset-select:hover {
    border-color: var(--color-secondary) !important;
}

.preset-select:focus {
    border-color: var(--color-primary) !important;
    box-shadow: 0 0 0 2px rgba(124, 58, 237, 0.2) !important;
    outline: none;
}

/* ==========================================================================
   Content Production Related Sites Section
   ========================================================================== */
.sites-section {
    margin: 10px 16px 20px 16px;
    padding: 16px;
    background-color: rgba(255, 255, 255, 0.02);
    border: 1px solid var(--border-glass);
    border-radius: 12px;
    display: flex;
    flex-direction: column;
    gap: 8px;
    text-align: left;
}

body.light-mode .sites-section {
    background-color: rgba(15, 23, 42, 0.02);
    border-color: rgba(0, 0, 0, 0.08);
}

.sites-section h4 {
    font-size: 0.85rem;
    font-weight: 700;
    color: var(--text-primary);
    margin: 0 0 8px 0;
    display: flex;
    align-items: center;
    gap: 6px;
}

.sites-section h4 i {
    color: var(--color-secondary);
}

.sites-section ul {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.sites-section ul li a {
    font-size: 0.8rem;
    color: var(--text-secondary);
    text-decoration: none;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: var(--transition-smooth);
}

.sites-section ul li a:hover {
    color: var(--text-primary);
}

.sites-section ul li a i {
    font-size: 0.7rem;
    opacity: 0.7;
    transition: var(--transition-smooth);
}

.sites-section ul li a:hover i {
    opacity: 1;
    transform: translate(1px, -1px);
}

/* ==========================================================================
   Dual Mode System (Fast Lite vs Pro Expert) Styles
   ========================================================================== */
.dual-mode-section {
    width: 100%;
    max-width: 900px;
    margin: 20px auto 30px auto;
}

.dual-mode-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
    width: 100%;
}

.dual-mode-card {
    background: var(--bg-glass);
    border: 1px solid var(--border-glass);
    border-radius: 18px;
    padding: 24px;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    text-align: left;
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    box-shadow: var(--glass-shadow);
    transition: var(--transition-smooth);
    position: relative;
    overflow: hidden;
}

.dual-mode-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 30px rgba(0, 0, 0, 0.25);
}

.mode-lite-card {
    border-color: rgba(6, 182, 212, 0.3);
}

.mode-lite-card:hover {
    border-color: var(--color-secondary);
    box-shadow: 0 0 25px rgba(6, 182, 212, 0.25);
}

.mode-pro-card {
    border-color: rgba(124, 58, 237, 0.3);
}

.mode-pro-card:hover {
    border-color: var(--color-primary);
    box-shadow: 0 0 25px rgba(124, 58, 237, 0.25);
}

.dual-card-header {
    margin-bottom: 12px;
}

.dual-card-header h4 {
    font-size: 1.25rem;
    font-weight: 800;
    margin-top: 8px;
    margin-bottom: 0;
    letter-spacing: -0.3px;
}

.dual-badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 0.75rem;
    font-weight: 700;
    padding: 4px 10px;
    border-radius: 20px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.lite-badge {
    background-color: rgba(6, 182, 212, 0.15);
    color: var(--color-secondary);
    border: 1px solid rgba(6, 182, 212, 0.3);
}

.pro-badge {
    background-color: rgba(124, 58, 237, 0.15);
    color: #c084fc;
    border: 1px solid rgba(124, 58, 237, 0.3);
}

.dual-card-desc {
    font-size: 0.85rem;
    color: var(--text-secondary);
    line-height: 1.5;
    margin-bottom: 16px;
}

.btn-dual-enter {
    width: 100%;
    padding: 14px 20px;
    font-size: 0.95rem;
    font-weight: 700;
    border-radius: 12px;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    cursor: pointer;
    transition: var(--transition-smooth);
    border: none;
    box-sizing: border-box;
}

.btn-lite-enter {
    background: linear-gradient(135deg, #0891b2, #06b6d4);
    color: #ffffff;
    box-shadow: 0 6px 20px rgba(6, 182, 212, 0.3);
}

.btn-lite-enter:hover {
    box-shadow: 0 8px 25px rgba(6, 182, 212, 0.5);
    transform: translateY(-2px);
}

.btn-pro-enter {
    background: linear-gradient(135deg, #7c3aed, #9333ea);
    color: #ffffff;
    box-shadow: 0 6px 20px rgba(124, 58, 237, 0.3);
}

.btn-pro-enter:hover {
    box-shadow: 0 8px 25px rgba(124, 58, 237, 0.5);
    transform: translateY(-2px);
}

/* Light Mode Overrides for Dual Cards */
body.landing-page.light-mode .dual-mode-card {
    background: rgba(255, 255, 255, 0.65);
    border-color: rgba(0, 0, 0, 0.08);
}

body.landing-page.light-mode .dual-card-header h4 {
    color: #0f172a;
}

/* Studio Header GenMode Segmented Switcher (Standardized 38px Height) */
.gen-mode-toggle-container {
    display: inline-flex;
    align-items: center;
    height: 38px;
    background-color: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--border-glass);
    border-radius: 10px;
    padding: 3px;
    gap: 2px;
    margin-left: 4px;
    box-sizing: border-box;
}

body.light-mode .gen-mode-toggle-container {
    background-color: rgba(0, 0, 0, 0.03);
    border-color: rgba(0, 0, 0, 0.08);
}

.gen-mode-btn {
    height: 100%;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    padding: 0 14px;
    font-size: 0.85rem;
    font-weight: 600;
    font-family: var(--font-main);
    color: var(--text-secondary);
    background: transparent;
    border: none;
    border-radius: 7px;
    cursor: pointer;
    transition: var(--transition-smooth);
    box-sizing: border-box;
    line-height: 1;
}

.gen-mode-btn i {
    font-size: 0.85rem;
}

.gen-mode-btn:hover {
    color: var(--text-primary);
    background-color: rgba(255, 255, 255, 0.04);
}

.gen-mode-btn.active[data-gen-mode="lite"] {
    background: linear-gradient(135deg, rgba(8, 145, 178, 0.9), rgba(6, 182, 212, 0.9));
    color: #ffffff;
    box-shadow: 0 2px 10px rgba(6, 182, 212, 0.3);
}

.gen-mode-btn.active[data-gen-mode="pro"] {
    background: linear-gradient(135deg, var(--color-primary), var(--color-primary-hover));
    color: #ffffff;
    box-shadow: var(--neon-shadow);
}

/* ChatGPT and Claude sub-buttons style */
.output-sub-buttons {
    display: flex;
    gap: 10px;
    margin-top: 10px;
}

.btn-sub-action {
    flex: 1;
    text-decoration: none;
    padding: 10px 0;
    font-size: 0.9rem;
}