:root {
    --primary-red: #de2910;
    --primary-gold: #ffde00;
    --ai-blue: #00bcd4;
    --ai-purple: #9c27b0;
    --bg-color: #fdfbf7;
    --text-dark: #2c3e50;
    --text-light: #596b7e;
    --glass-bg: rgba(255, 255, 255, 0.92);
    --glass-border: rgba(255, 255, 255, 0.5);
    --shadow: 0 8px 32px 0 rgba(31, 38, 135, 0.15);
    --shadow-lg: 0 12px 48px 0 rgba(31, 38, 135, 0.25);
    --font-title: 'Ma Shan Zheng', cursive;
    --font-body: 'Outfit', sans-serif;
    --font-serif: 'Noto Serif SC', serif;
    --font-mono: 'JetBrains Mono', monospace;
}

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

body {
    background-color: var(--bg-color);
    background-image:
        radial-gradient(circle at 10% 20%, rgba(222, 41, 16, 0.03) 0%, transparent 25%),
        radial-gradient(circle at 90% 80%, rgba(0, 188, 212, 0.04) 0%, transparent 25%),
        radial-gradient(circle at 50% 50%, rgba(156, 39, 176, 0.02) 0%, transparent 35%);
    color: var(--text-dark);
    font-family: var(--font-body);
    height: 100vh;
    overflow: hidden;
}

.app-container {
    display: flex;
    flex-direction: column;
    height: 100%;
    max-width: 1600px;
    margin: 0 auto;
    padding: 15px;
}

/* ===== Header ===== */
.main-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 18px 30px;
    background: var(--glass-bg);
    backdrop-filter: blur(15px);
    border-radius: 16px;
    box-shadow: var(--shadow);
    margin-bottom: 15px;
    border: 1px solid var(--glass-border);
}

.header-content h1 {
    font-family: var(--font-serif);
    font-size: 1.5rem;
    color: var(--text-dark);
    margin-bottom: 4px;
}

.header-content .highlight {
    color: var(--primary-red);
    font-family: var(--font-title);
    font-size: 1.9rem;
    margin-left: 10px;
}

.subtitle {
    font-family: var(--font-body);
    color: var(--text-light);
    font-size: 0.85rem;
    letter-spacing: 1px;
    text-transform: uppercase;
}

.progress-indicator {
    display: flex;
    align-items: center;
    gap: 15px;
}

.progress-bar {
    width: 220px;
    height: 24px;
    background: rgba(0, 0, 0, 0.05);
    border-radius: 12px;
    overflow: hidden;
    position: relative;
}

.progress-fill {
    height: 100%;
    width: 0%;
    background: linear-gradient(90deg, var(--ai-blue), var(--ai-purple));
    transition: width 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    border-radius: 12px;
}

.progress-text {
    font-family: var(--font-mono);
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-dark);
}

/* ===== Main Stage ===== */
.main-stage {
    display: flex;
    gap: 15px;
    flex: 1;
    overflow: hidden;
}

.left-panel,
.right-panel {
    width: 260px;
    background: var(--glass-bg);
    backdrop-filter: blur(15px);
    border-radius: 14px;
    box-shadow: var(--shadow);
    border: 1px solid var(--glass-border);
    padding: 18px;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: 18px;
}

.proof-workspace {
    flex: 1;
    background: var(--glass-bg);
    backdrop-filter: blur(15px);
    border-radius: 14px;
    box-shadow: var(--shadow);
    border: 1px solid var(--glass-border);
    padding: 22px;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

/* ===== Panel Sections ===== */
.panel-section {
    background: rgba(255, 255, 255, 0.5);
    border-radius: 10px;
    padding: 15px;
}

.panel - header {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 12px;
    padding-bottom: 8px;
    border-bottom: 2px solid var(--primary-gold);
}

.panel-icon {
    font-size: 1.3rem;
}

.panel-header h3 {
    font-size: 1rem;
    color: var(--primary-red);
    font-weight: 700;
}

/* ===== Premise Grid ===== */
.premise-grid {
    display: grid;
    gap: 8px;
}

.premise-card {
    padding: 10px;
    background: white;
    border: 1px solid #e0e0e0;
    border-radius: 8px;
    font-family: var(--font-mono);
    font-size: 0.85rem;
    transition: all 0.2s;
    cursor: default;
}

.premise-card:hover {
    border-color: var(--ai-blue);
    box-shadow: 0 2px 8px rgba(0, 188, 212, 0.2);
}

.premise-formula {
    font-weight: 600;
    margin-bottom: 4px;
    color: var(--text-dark);
}

.premise-desc {
    font-size: 0.8rem;
    color: var(--text-light);
}

/* ===== Rules List ===== */
.rules-list {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.rule-card {
    padding: 12px;
    background: white;
    border: 1px solid #e0e0e0;
    border-radius: 8px;
}

.rule-name {
    font-weight: 700;
    color: var(--ai-purple);
    margin-bottom: 6px;
    font-size: 0.9rem;
}

.rule-formula {
    font-size: 0.85rem;
    color: var(--text-light);
}

/* ===== Symbol Grid ===== */
.symbol-grid {
    display: grid;
    gap: 5px;
}

.symbol-item {
    padding: 6px 10px;
    background: white;
    border-radius: 6px;
    font-size: 0.85rem;
}

/* ===== Workspace ===== */
.workspace-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 15px;
    padding-bottom: 12px;
    border-bottom: 2px solid var(--primary-gold);
}

.workspace-header h2 {
    font-family: var(--font-title);
    font-size: 1.7rem;
    color: var(--primary-red);
}

.controls {
    display: flex;
    gap: 8px;
}

.ctrl-btn {
    padding: 8px 16px;
    background: white;
    border: 1px solid #ddd;
    border-radius: 8px;
    cursor: pointer;
    font-size: 0.85rem;
    font-weight: 600;
    transition: all 0.2s;
}

.ctrl-btn:hover {
    background: #f5f5f5;
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
}

.ctrl-btn.primary {
    background: linear-gradient(135deg, var(--ai-blue), var(--ai-purple));
    color: white;
    border: none;
}

.ctrl-btn.primary:hover {
    box-shadow: 0 4px 12px rgba(0, 188, 212, 0.4);
}

/* ===== Proof Table ===== */
.proof-container {
    flex: 1;
    overflow-y: auto;
    margin-bottom: 15px;
    border-radius: 10px;
}

.proof-table {
    width: 100%;
    border-collapse: collapse;
    font-family: var(--font-mono);
    background: white;
    border-radius: 10px;
    overflow: hidden;
}

.proof-table thead {
    background: linear-gradient(135deg, var(--primary-red), #c41e0a);
    color: white;
    position: sticky;
    top: 0;
    z-index: 10;
}

.proof-table th {
    padding: 12px;
    text-align: left;
    font-weight: 600;
    font-size: 0.9rem;
}

.proof-table tbody tr {
    border-bottom: 1px solid #e8e8e8;
    transition: all 0.2s;
    animation: slideIn 0.3s ease;
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateX(-10px);
    }

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

.proof-table tbody tr:hover {
    background: rgba(0, 188, 212, 0.05);
}

.proof-table td {
    padding: 10px 12px;
}

.proof-table td:nth-child(1) {
    font-weight: 700;
    color: var(--primary-red);
}

.proof-table td:nth-child(3) {
    color: var(--text-light);
    font-size: 0.85rem;
}

/* ===== Next Step Hint ===== */
.next-step-hint {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 15px;
    background: linear-gradient(135deg, #e3f2fd, #f3e5f5);
    border-radius: 10px;
    border-left: 4px solid var(--ai-blue);
}

.hint-icon {
    font-size: 1.8rem;
}

.hint-text {
    color: var(--text-dark);
    font-size: 0.95rem;
}

/* ===== Ideology Box ===== */
.ideology-box h4 {
    color: var(--primary-red);
    margin-bottom: 10px;
    font-size: 1.05rem;
}

.ideology-box p {
    font-size: 0.9rem;
    line-height: 1.6;
    color: var(--text-light);
    margin-bottom: 10px;
}

/* ===== Goal Box ===== */
.goal-box {
    text-align: center;
}

.goal-label {
    font-weight: 600;
    margin-bottom: 10px;
    color: var(--text-dark);
}

.goal-formula {
    font-size: 1.5rem;
    margin: 12px 0;
    padding: 15px;
    background: white;
    border-radius: 8px;
    font-family: var(--font-mono);
    color: var(--primary-red);
}

.goal-desc {
    font-size: 0.85rem;
    color: var(--text-light);
}

/* ===== Milestones ===== */
.milestones {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.milestone {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px;
    background: white;
    border-radius: 10px;
    border: 2px solid #e0e0e0;
    transition: all 0.3s;
}

.milestone.achieved {
    border-color: var(--ai-blue);
    background: linear-gradient(135deg, #e0f7fa, #ffffff);
    animation: achieve 0.5s ease;
}

@keyframes achieve {

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

    50% {
        transform: scale(1.05);
    }
}

.milestone-icon {
    font-size: 1.6rem;
}

.milestone-info {
    flex: 1;
}

.milestone-title {
    font-weight: 600;
    font-size: 0.9rem;
    margin-bottom: 2px;
}

.milestone-status {
    font-size: 0.8rem;
    color: var(--text-light);
}

/* ===== Stage Progress ===== */
.stage-progress {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.stage-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 8px 12px;
    background: white;
    border-radius: 8px;
    transition: all 0.2s;
}

.stage-item.active {
    background: linear-gradient(135deg, #fff9e6, #ffffff);
    border-left: 3px solid var(--primary-gold);
}

.stage-check {
    font-size: 1.2rem;
}

.stage-name {
    font-size: 0.85rem;
    font-weight: 600;
}

/* ===== Modal ===== */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 2000;
}

.modal.show {
    display: block;
    animation: fadeIn 0.3s ease;
}

.modal-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.7);
}

.modal-content {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background: white;
    padding: 40px;
    border-radius: 20px;
    max-width: 600px;
    width: 90%;
    box-shadow: var(--shadow-lg);
    animation: slideUp 0.5s ease;
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translate(-50%, -40%);
    }

    to {
        opacity: 1;
        transform: translate(-50%, -50%);
    }
}

.success-header h2 {
    font-family: var(--font-title);
    color: var(--primary-red);
    font-size: 2rem;
    text-align: center;
    margin-bottom: 25px;
}

.success-visual {
    margin: 25px 0;
}

.success-icons {
    display: flex;
    justify-content: center;
    gap: 25px;
}

.icon-lg {
    font-size: 3.5rem;
    animation: bounce 1.2s infinite;
}

.icon-lg:nth-child(2) {
    animation-delay: 0.2s;
}

.icon-lg:nth-child(3) {
    animation-delay: 0.4s;
}

.icon-lg:nth-child(4) {
    animation-delay: 0.6s;
}

@keyframes bounce {

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

    50% {
        transform: translateY(-15px);
    }
}

.success-body {
    text-align: center;
}

.success-msg {
    font-size: 1.1rem;
    line-height: 1.7;
    margin-bottom: 20px;
    color: var(--text-dark);
}

.success-quote {
    display: flex;
    gap: 12px;
    padding: 18px;
    background: #fff5f5;
    border-left: 4px solid var(--primary-red);
    border-radius: 10px;
    margin: 20px 0;
    text-align: left;
}

.quote-icon {
    font-size: 1.8rem;
}

.quote-text {
    font-family: var(--font-serif);
    font-size: 0.95rem;
    line-height: 1.6;
    color: var(--text-dark);
}

.btn-primary {
    width: 100%;
    padding: 14px;
    background: linear-gradient(135deg, var(--primary-red), #c41e0a);
    color: white;
    border: none;
    border-radius: 10px;
    font-size: 1.05rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
    margin-top: 20px;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 16px rgba(222, 41, 16, 0.3);
}