/*
 * Copyright (c) 2026 Russell Shen. All rights reserved.
 *
 * This source code is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 
 * 4.0 International (CC BY-NC-ND 4.0) license.
 *
 * Commercial use, proprietary use, or use in closed-source or revenue-generating projects 
 * is strictly prohibited under this license.
 *
 * For commercial licensing inquiries, please contact:
 * Russell Shen (russellshen7@gmail.com)
 *
 * Licensing terms, scope, and compensation are subject to separate negotiation.
 */

/* Root tokens and variables */
:root {
    --bg-dark: #090a16;
    --bg-deep: #0e0f24;
    --glass-bg: rgba(18, 20, 48, 0.55);
    --glass-border: rgba(255, 255, 255, 0.08);
    --glass-border-hover: rgba(255, 255, 255, 0.16);
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --accent-violet: #8b5cf6;
    --accent-cyan: #06b6d4;
    --accent-green: #10b981;
    --accent-gradient: linear-gradient(135deg, #8b5cf6 0%, #06b6d4 100%);
    --accent-gradient-hover: linear-gradient(135deg, #a78bfa 0%, #22d3ee 100%);
    --font-heading: 'Outfit', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    --font-body: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    --font-mono: 'Fira Code', monospace;
    --shadow-premium: 0 20px 40px -15px rgba(0, 0, 0, 0.5);
    --transition-smooth: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

body {
    background-color: var(--bg-dark);
    color: var(--text-primary);
    font-family: var(--font-body);
    min-height: 100vh;
    overflow-x: hidden;
    position: relative;
    padding: 2rem 1rem;
    line-height: 1.5;
}

/* Subtle background glowing spots for futuristic aesthetic */
.background-glow {
    position: fixed;
    top: -10%;
    left: -10%;
    width: 60%;
    height: 60%;
    background: radial-gradient(circle, rgba(139, 92, 246, 0.12) 0%, rgba(0,0,0,0) 70%);
    z-index: -1;
    pointer-events: none;
    filter: blur(80px);
    animation: floatGlow 15s ease-in-out infinite alternate;
}

@keyframes floatGlow {
    0% { transform: translate(0, 0) scale(1); }
    100% { transform: translate(10%, 10%) scale(1.1); }
}

/* App Container */
.app-container {
    max-width: 1400px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

/* Header */
.main-header {
    text-align: center;
    margin-bottom: 1rem;
}

.logo-area {
    font-family: var(--font-heading);
    font-size: 3.5rem;
    font-weight: 800;
    letter-spacing: -0.05em;
    margin-bottom: 0.5rem;
    display: inline-flex;
    align-items: center;
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    filter: drop-shadow(0 2px 10px rgba(139, 92, 246, 0.2));
}

.logo-eng {
    font-weight: 300;
}

.logo-lisp {
    font-weight: 800;
}

.tagline {
    font-size: 1.1rem;
    color: var(--text-secondary);
    font-weight: 400;
}

/* Quick Sentence Samples */
.samples-section {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    align-items: center;
}

.section-title {
    font-family: var(--font-heading);
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

.samples-grid {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
    justify-content: center;
}

.sample-btn {
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--glass-border);
    border-radius: 30px;
    padding: 0.6rem 1.2rem;
    color: var(--text-primary);
    font-family: var(--font-body);
    font-size: 0.9rem;
    cursor: pointer;
    transition: var(--transition-smooth);
}

.sample-btn:hover {
    background: rgba(255, 255, 255, 0.08);
    border-color: var(--accent-cyan);
    box-shadow: 0 0 12px rgba(6, 182, 212, 0.25);
    transform: translateY(-2px);
}

/* Grid Layout */
.pipeline-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 2rem;
}

/* Double width card */
.double-width {
    grid-column: span 2;
}

/* Card Styling */
.card {
    background: var(--glass-bg);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid var(--glass-border);
    border-radius: 20px;
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
    box-shadow: var(--shadow-premium);
    transition: var(--transition-smooth);
}

.card:hover {
    border-color: var(--glass-border-hover);
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.6);
}

/* Card Header */
.card-header {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.stage-badge {
    background: var(--accent-gradient);
    color: #fff;
    padding: 0.25rem 0.75rem;
    border-radius: 30px;
    font-family: var(--font-heading);
    font-weight: 700;
    font-size: 0.8rem;
    letter-spacing: 0.05em;
    text-transform: uppercase;
}

.card-title {
    font-family: var(--font-heading);
    font-size: 1.4rem;
    font-weight: 600;
}

/* Card Body elements */
.card-desc {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-bottom: 0.5rem;
}

.lang-selector-row {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-top: 0.25rem;
    margin-bottom: 0.75rem;
}

.lang-label {
    font-family: var(--font-heading);
    font-size: 0.9rem;
    color: var(--text-secondary);
    font-weight: 500;
}

.lang-select {
    background: rgba(0, 0, 0, 0.35);
    border: 1px solid var(--glass-border);
    border-radius: 8px;
    padding: 0.35rem 0.75rem;
    color: var(--text-primary);
    font-family: var(--font-heading);
    font-size: 0.85rem;
    outline: none;
    cursor: pointer;
    transition: var(--transition-smooth);
}

.lang-select:focus {
    border-color: var(--accent-cyan);
    box-shadow: 0 0 8px rgba(6, 182, 212, 0.25);
}

.text-input {
    width: 100%;
    min-height: 100px;
    background: rgba(0, 0, 0, 0.25);
    border: 1px solid var(--glass-border);
    border-radius: 12px;
    padding: 1rem;
    color: var(--text-primary);
    font-family: var(--font-body);
    font-size: 1rem;
    resize: vertical;
    outline: none;
    transition: var(--transition-smooth);
}

.text-input:focus {
    border-color: var(--accent-violet);
    box-shadow: 0 0 10px rgba(139, 92, 246, 0.2);
}

.code-input {
    font-family: var(--font-mono);
    font-size: 0.95rem;
    min-height: 110px;
    background: rgba(0, 0, 0, 0.35);
}

/* Buttons */
.action-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    border-radius: 12px;
    padding: 0.8rem 1.5rem;
    font-family: var(--font-heading);
    font-weight: 600;
    font-size: 1rem;
    cursor: pointer;
    transition: var(--transition-smooth);
    border: none;
    width: 100%;
}

.btn-icon {
    width: 18px;
    height: 18px;
    transition: var(--transition-smooth);
}

.action-btn:hover .btn-icon {
    transform: translateX(4px);
}

.action-btn:hover .rev-icon {
    transform: translateX(-4px);
}

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

.primary-btn:hover {
    background: var(--accent-gradient-hover);
    box-shadow: 0 0 20px rgba(139, 92, 246, 0.4);
}

.secondary-btn {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--glass-border);
    color: var(--text-primary);
}

.secondary-btn:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: var(--accent-cyan);
    box-shadow: 0 0 15px rgba(6, 182, 212, 0.25);
}

.accent-btn {
    background: linear-gradient(135deg, #059669 0%, #10b981 100%);
    color: #fff;
}

.accent-btn:hover {
    background: linear-gradient(135deg, #10b981 0%, #34d399 100%);
    box-shadow: 0 0 15px rgba(16, 185, 129, 0.4);
}

/* Tabs for Stage 2 */
.xbar-tabs {
    display: flex;
    gap: 0.5rem;
    border-bottom: 1px solid var(--glass-border);
    padding-bottom: 0.5rem;
    margin-bottom: 0.5rem;
}

.tab-btn {
    background: none;
    border: none;
    color: var(--text-secondary);
    padding: 0.5rem 1rem;
    font-family: var(--font-heading);
    font-weight: 500;
    font-size: 0.95rem;
    cursor: pointer;
    transition: var(--transition-smooth);
    border-bottom: 2px solid transparent;
}

.tab-btn.active {
    color: var(--accent-cyan);
    border-bottom-color: var(--accent-cyan);
}

.tab-btn:hover {
    color: var(--text-primary);
}

/* Visual Tree and Text AST Panel */
.visual-container {
    background: rgba(0, 0, 0, 0.25);
    border-radius: 12px;
    border: 1px solid var(--glass-border);
    overflow: auto;
    display: flex;
    justify-content: center;
    align-items: center;
}

.code-output {
    background: rgba(0, 0, 0, 0.35);
    border-radius: 12px;
    border: 1px solid var(--glass-border);
    padding: 1.5rem;
    font-family: var(--font-mono);
    font-size: 0.9rem;
    color: var(--accent-cyan);
    max-height: 450px;
    overflow-y: auto;
    white-space: pre-wrap;
}

.hidden {
    display: none !important;
}

/* SVG Rendering styles */
#xbar-svg {
    user-select: none;
}

.tree-link {
    fill: none;
    stroke: rgba(6, 182, 212, 0.25);
    stroke-width: 2.5px;
    transition: var(--transition-smooth);
}

.tree-node-circle {
    fill: #1e1b4b;
    stroke: var(--accent-violet);
    stroke-width: 2px;
    transition: var(--transition-smooth);
    cursor: pointer;
}

.tree-node-circle.phrase-node {
    stroke: var(--accent-violet);
    fill: #1e1b4b;
}

.tree-node-circle.bar-node {
    stroke: var(--accent-cyan);
    fill: #0c4a6e;
}

.tree-node-circle.head-node {
    stroke: var(--accent-green);
    fill: #064e3b;
}

.tree-node-text {
    font-family: var(--font-heading);
    font-size: 11px;
    font-weight: 700;
    fill: var(--text-primary);
    text-anchor: middle;
    pointer-events: none;
}

.tree-leaf-text {
    font-family: var(--font-body);
    font-size: 12px;
    font-weight: 500;
    fill: #38bdf8;
    text-anchor: middle;
    pointer-events: none;
}

.tree-node:hover .tree-node-circle {
    transform: scale(1.15);
    filter: drop-shadow(0 0 8px var(--accent-cyan));
    stroke: var(--text-primary);
}

/* Footer info */
.pipeline-info {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 2rem;
    margin-top: 1rem;
    padding-top: 2rem;
    border-top: 1px solid var(--glass-border);
}

.info-card {
    background: rgba(255, 255, 255, 0.01);
    border-radius: 12px;
    padding: 1.25rem;
    border: 1px solid rgba(255, 255, 255, 0.03);
}

.info-card h4 {
    font-family: var(--font-heading);
    font-size: 1.1rem;
    color: var(--accent-cyan);
    margin-bottom: 0.75rem;
}

.info-card ul {
    list-style-type: none;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.info-card li {
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.info-card li strong {
    color: var(--text-primary);
}

/* Responsive adjustment */
@media (max-width: 900px) {
    .pipeline-grid {
        grid-template-columns: 1fr;
    }
    .double-width {
        grid-column: span 1;
    }
    .pipeline-info {
        grid-template-columns: 1fr;
    }
}

/* S-Expression Interpreter Console & World State Styles */
.world-section {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    margin-top: 1rem;
    padding-top: 2rem;
    border-top: 1px solid var(--glass-border);
}

.world-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
}

@media (max-width: 900px) {
    .world-grid {
        grid-template-columns: 1fr;
    }
}

.world-state-container {
    background: rgba(0, 0, 0, 0.25);
    border-radius: 12px;
    border: 1px solid var(--glass-border);
    padding: 1rem;
    min-height: 180px;
    max-height: 250px;
    overflow-y: auto;
}

.facts-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.facts-list li {
    font-family: var(--font-mono);
    font-size: 0.95rem;
    color: var(--accent-green);
    background: rgba(16, 185, 129, 0.05);
    border: 1px solid rgba(16, 185, 129, 0.15);
    padding: 0.4rem 0.8rem;
    border-radius: 8px;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.facts-list li::before {
    content: "•";
    color: var(--accent-green);
    font-weight: bold;
    margin-right: 0.25rem;
}

.facts-list li.empty-state {
    color: var(--text-secondary);
    background: none;
    border: none;
    font-family: var(--font-body);
    font-size: 0.9rem;
    text-align: center;
    justify-content: center;
    padding-top: 3.5rem;
}

.facts-list li.empty-state::before {
    content: none;
}

.console-wrapper {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    background: rgba(0, 0, 0, 0.35);
    border-radius: 12px;
    border: 1px solid var(--glass-border);
    padding: 1rem;
}

.console-log {
    min-height: 150px;
    max-height: 200px;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    font-family: var(--font-mono);
    font-size: 0.9rem;
    padding-bottom: 0.5rem;
    border-bottom: 1px solid var(--glass-border);
}

.log-entry {
    line-height: 1.4;
    word-break: break-all;
}

.log-entry.system-msg {
    color: var(--text-secondary);
    font-style: italic;
}

.log-entry.user-cmd {
    color: var(--accent-cyan);
}

.log-entry.user-cmd::before {
    content: "> ";
    color: var(--text-secondary);
}

.log-entry.success-msg {
    color: var(--accent-green);
}

.log-entry.info-msg {
    color: #e2e8f0;
}

.log-entry.error-msg {
    color: #ef4444;
}

.console-input-row {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    background: rgba(0, 0, 0, 0.2);
    border: 1px solid var(--glass-border);
    border-radius: 8px;
    padding: 0.25rem 0.5rem;
}

.console-prompt {
    font-family: var(--font-mono);
    color: var(--text-secondary);
    font-weight: bold;
    user-select: none;
}

#console-input {
    flex-grow: 1;
    background: none;
    border: none;
    outline: none;
    color: var(--text-primary);
    font-family: var(--font-mono);
    font-size: 0.95rem;
    padding: 0.5rem 0;
}

#btn-submit-console {
    width: auto;
    padding: 0.4rem 1rem;
    font-size: 0.9rem;
    border-radius: 6px;
}

/* Toast Notification System */
.toast-container {
    position: fixed;
    top: 20px;
    right: 20px;
    z-index: 9999;
    display: flex;
    flex-direction: column;
    gap: 10px;
    pointer-events: none;
}

.toast {
    pointer-events: auto;
    background: rgba(239, 68, 68, 0.2);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid rgba(239, 68, 68, 0.4);
    color: #fca5a5;
    padding: 1rem 1.5rem;
    border-radius: 12px;
    font-family: var(--font-body);
    font-size: 0.95rem;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.4);
    min-width: 300px;
    max-width: 450px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    transform: translateX(120%);
    transition: transform 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

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

.toast.success {
    background: rgba(16, 185, 129, 0.2);
    border-color: rgba(16, 185, 129, 0.4);
    color: #a7f3d0;
}

.toast-close {
    background: none;
    border: none;
    color: currentColor;
    opacity: 0.7;
    cursor: pointer;
    font-size: 1.25rem;
    font-weight: bold;
    padding: 0 0.25rem;
    line-height: 1;
}

.toast-close:hover {
    opacity: 1;
}

/* ==========================================
   CODEMIRROR STYLE OVERRIDES
   ========================================== */
.CodeMirror {
    font-family: var(--font-mono);
    font-size: 0.95rem;
    background: transparent !important;
    color: var(--text-primary) !important;
    height: 100%;
}
.CodeMirror-gutters {
    background: rgba(0, 0, 0, 0.2) !important;
    border-right: 1px solid var(--glass-border) !important;
}
.CodeMirror-scroll {
    overflow-x: hidden !important;
}
.editor-container {
    border: 1px solid var(--glass-border);
    border-radius: 12px;
    background: rgba(0, 0, 0, 0.35) !important;
    padding: 0.25rem !important;
    overflow: hidden;
    height: 120px;
    min-height: 120px !important;
    transition: var(--transition-smooth);
}
.editor-container.error-glow {
    border-color: #ef4444 !important;
    box-shadow: 0 0 15px rgba(239, 68, 68, 0.4) !important;
}

/* ==========================================
   INTERACTIVE AGENT SANDBOX
   ========================================== */
.agent-nodes-grid {
    display: flex;
    justify-content: space-around;
    gap: 1.5rem;
    margin-bottom: 1.5rem;
    flex-wrap: wrap;
}
.agent-node {
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid var(--glass-border);
    border-radius: 16px;
    padding: 1rem;
    display: flex;
    align-items: center;
    gap: 1rem;
    min-width: 220px;
    transition: var(--transition-smooth);
    position: relative;
}
.agent-node.active-pulse-alice {
    background: rgba(139, 92, 246, 0.08);
    border-color: var(--accent-violet);
    box-shadow: 0 0 15px rgba(139, 92, 246, 0.25);
    transform: translateY(-4px);
}
.agent-node.active-pulse-bob {
    background: rgba(6, 182, 212, 0.08);
    border-color: var(--accent-cyan);
    box-shadow: 0 0 15px rgba(6, 182, 212, 0.25);
    transform: translateY(-4px);
}
.agent-node.active-pulse-charlie {
    background: rgba(16, 185, 129, 0.08);
    border-color: var(--accent-green);
    box-shadow: 0 0 15px rgba(16, 185, 129, 0.25);
    transform: translateY(-4px);
}
.node-indicator {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: #94a3b8;
    transition: var(--transition-smooth);
}
.active-pulse-alice .node-indicator {
    background: var(--accent-violet);
    box-shadow: 0 0 8px var(--accent-violet);
    animation: blinkGlow 1s infinite alternate;
}
.active-pulse-bob .node-indicator {
    background: var(--accent-cyan);
    box-shadow: 0 0 8px var(--accent-cyan);
    animation: blinkGlow 1s infinite alternate;
}
.active-pulse-charlie .node-indicator {
    background: var(--accent-green);
    box-shadow: 0 0 8px var(--accent-green);
    animation: blinkGlow 1s infinite alternate;
}
@keyframes blinkGlow {
    0% { opacity: 0.4; }
    100% { opacity: 1; }
}
.node-avatar {
    width: 45px;
    height: 45px;
    border-radius: 50%;
    border: 2px solid var(--glass-border);
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-heading);
    font-weight: 800;
    font-size: 1.25rem;
    color: #fff;
    transition: var(--transition-smooth);
}
.active-pulse-alice .node-avatar {
    border-color: var(--accent-violet);
    box-shadow: 0 0 8px rgba(139, 92, 246, 0.3);
}
.active-pulse-bob .node-avatar {
    border-color: var(--accent-cyan);
    box-shadow: 0 0 8px rgba(6, 182, 212, 0.3);
}
.active-pulse-charlie .node-avatar {
    border-color: var(--accent-green);
    box-shadow: 0 0 8px rgba(16, 185, 129, 0.3);
}
.node-info {
    display: flex;
    flex-direction: column;
}
.node-name {
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--text-primary);
}
.node-status {
    font-size: 0.8rem;
    color: var(--text-secondary);
}
.active-pulse-alice .node-status,
.active-pulse-bob .node-status,
.active-pulse-charlie .node-status {
    color: var(--text-primary);
    font-weight: 500;
}
.sandbox-controls {
    display: flex;
    gap: 1.5rem;
    align-items: center;
    justify-content: space-between;
    margin-top: 1rem;
    flex-wrap: wrap;
}
.speed-control {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    background: rgba(0, 0, 0, 0.20);
    border: 1px solid var(--glass-border);
    padding: 0.4rem 0.8rem;
    border-radius: 8px;
}
.speed-control input[type="range"] {
    accent-color: var(--accent-cyan);
    cursor: pointer;
    width: 120px;
}
.log-entry.agent-alice {
    color: #c084fc;
}
.log-entry.agent-alice::before {
    content: "[Alice] ";
    font-weight: bold;
}
.log-entry.agent-bob {
    color: #22d3ee;
}
.log-entry.agent-bob::before {
    content: "[Bob] ";
    font-weight: bold;
}
.log-entry.agent-charlie {
    color: #34d399;
}
.log-entry.agent-charlie::before {
    content: "[Charlie] ";
    font-weight: bold;
}

/* Voice Input Styles */
.voice-btn:hover {
    background: rgba(255, 255, 255, 0.15) !important;
    color: var(--accent-cyan) !important;
    box-shadow: 0 0 10px rgba(34, 211, 238, 0.3);
}

.voice-btn.recording {
    background: rgba(239, 68, 68, 0.2) !important;
    border-color: rgba(239, 68, 68, 0.8) !important;
    color: #ef4444 !important;
    animation: voice-pulse 1.5s infinite;
}

@keyframes voice-pulse {
    0% {
        box-shadow: 0 0 0 0 rgba(239, 68, 68, 0.4);
    }
    70% {
        box-shadow: 0 0 0 10px rgba(239, 68, 68, 0);
    }
    100% {
        box-shadow: 0 0 0 0 rgba(239, 68, 68, 0);
    }
}

/* User Account Modal Overlay & Content Styles */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.65);
    backdrop-filter: blur(8px);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 1000;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s ease;
}

.modal-overlay.active {
    opacity: 1;
    pointer-events: auto;
}

.modal-overlay .modal-content {
    width: 90%;
    max-width: 450px;
    background: rgba(15, 10, 30, 0.85);
    border: 1px solid var(--glass-border);
    box-shadow: var(--neon-glow);
    border-radius: 16px;
    transform: scale(0.9);
    transition: transform 0.3s ease;
}

.modal-overlay.active .modal-content {
    transform: scale(1);
}

.modal-close-btn {
    background: none;
    border: none;
    color: var(--text-secondary);
    font-size: 1.8rem;
    cursor: pointer;
    line-height: 1;
    transition: var(--transition-smooth);
    padding: 0;
    margin: 0;
}

.modal-close-btn:hover {
    color: var(--text-primary);
    transform: scale(1.1);
}

.auth-tabs .tab-btn {
    border-bottom: 2px solid transparent;
    padding-bottom: 0.5rem;
    background: none;
    border: none;
    color: var(--text-secondary);
    font-family: var(--font-heading);
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition-smooth);
}

.auth-tabs .tab-btn.active {
    color: var(--accent-cyan);
    border-bottom-color: var(--accent-cyan);
}

.badge {
    text-transform: uppercase;
    font-size: 0.75rem;
    letter-spacing: 0.05em;
}