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

:root {
    --primary-bg: #0f0f0f;
    --secondary-bg: #1a1a1a;
    --card-bg: #242424;
    --text-primary: #e8e8e8;
    --text-secondary: #a0a0a0;
    --accent: #6366f1;
    --accent-hover: #818cf8;
    --border: #333;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Helvetica Neue', Arial, sans-serif;
    background: var(--primary-bg);
    color: var(--text-primary);
    line-height: 1.7;
    font-size: 16px;
    overflow-x: hidden;
}

.container {
    max-width: 900px;
    margin: 0 auto;
    padding: 3rem 2rem;
}

/* Header */
header {
    text-align: center;
    margin-bottom: 4rem;
    padding: 3rem 0;
}

.title {
    font-size: 3.5rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--accent) 0%, var(--accent-hover) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 0.5rem;
    animation: fadeInDown 0.8s ease-out;
}

.subtitle {
    color: var(--text-secondary);
    font-size: 1.2rem;
    font-style: italic;
    animation: fadeInUp 0.8s ease-out 0.2s both;
}

/* Sections */
section {
    margin-bottom: 4rem;
    animation: fadeIn 0.8s ease-out;
}

section h2 {
    font-size: 2rem;
    margin-bottom: 1.5rem;
    color: var(--text-primary);
    position: relative;
    padding-bottom: 0.5rem;
}

section h2::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 60px;
    height: 3px;
    background: linear-gradient(90deg, var(--accent), transparent);
}

section p {
    margin-bottom: 1rem;
    color: var(--text-secondary);
    font-size: 1.1rem;
}

/* Intro Section */
.intro {
    background: var(--secondary-bg);
    padding: 2.5rem;
    border-radius: 12px;
    border: 1px solid var(--border);
    animation: fadeInUp 0.8s ease-out 0.4s both;
}

.intro p:first-child {
    font-size: 1.3rem;
    color: var(--text-primary);
}

/* Reflection Section */
.reflection {
    animation: fadeInUp 0.8s ease-out 0.6s both;
}

/* Thought Grid */
.thought-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem;
    margin-top: 2rem;
}

.thought-card {
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 2rem;
    cursor: pointer;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.thought-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--accent), var(--accent-hover));
    transform: scaleX(0);
    transition: var(--transition);
    transform-origin: left;
}

.thought-card:hover {
    border-color: var(--accent);
    transform: translateY(-4px);
    box-shadow: 0 8px 24px rgba(99, 102, 241, 0.2);
}

.thought-card:hover::before {
    transform: scaleX(1);
}

.thought-card h3 {
    font-size: 1.4rem;
    margin-bottom: 0.8rem;
    color: var(--text-primary);
}

.thought-preview {
    color: var(--text-secondary);
    font-style: italic;
    margin-bottom: 0;
}

.thought-full {
    display: none;
    margin-top: 1rem;
    padding-top: 1rem;
    border-top: 1px solid var(--border);
    animation: fadeIn 0.3s ease-out;
}

.thought-card.expanded .thought-preview {
    display: none;
}

.thought-card.expanded .thought-full {
    display: block;
}

.thought-full p {
    margin-bottom: 1rem;
    font-size: 1rem;
}

/* Interactive Section */
.interactive {
    background: var(--secondary-bg);
    padding: 2.5rem;
    border-radius: 12px;
    border: 1px solid var(--border);
    text-align: center;
}

.generate-btn {
    background: linear-gradient(135deg, var(--accent), var(--accent-hover));
    color: white;
    border: none;
    padding: 1rem 2.5rem;
    font-size: 1.1rem;
    border-radius: 8px;
    cursor: pointer;
    transition: var(--transition);
    font-weight: 600;
    margin: 1.5rem 0;
    box-shadow: 0 4px 12px rgba(99, 102, 241, 0.3);
}

.generate-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(99, 102, 241, 0.4);
}

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

.random-thought {
    margin-top: 2rem;
    padding: 1.5rem;
    background: var(--card-bg);
    border-radius: 8px;
    border-left: 4px solid var(--accent);
    min-height: 60px;
    text-align: left;
    font-style: italic;
    color: var(--text-primary);
    animation: fadeIn 0.5s ease-out;
}

.random-thought:empty {
    display: none;
}

/* Closing Section */
.closing {
    text-align: center;
    padding-top: 2rem;
}

.signature {
    font-size: 1.5rem;
    font-style: italic;
    color: var(--accent);
    margin: 2rem 0;
}

.meta {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-top: 3rem;
    padding-top: 2rem;
    border-top: 1px solid var(--border);
}

.meta a {
    color: var(--accent);
    text-decoration: none;
    transition: var(--transition);
}

.meta a:hover {
    color: var(--accent-hover);
    text-decoration: underline;
}

/* Animations */
@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

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

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

/* Responsive Design */
@media (max-width: 768px) {
    .container {
        padding: 2rem 1.5rem;
    }

    .title {
        font-size: 2.5rem;
    }

    .subtitle {
        font-size: 1rem;
    }

    section h2 {
        font-size: 1.6rem;
    }

    .thought-grid {
        grid-template-columns: 1fr;
        gap: 1rem;
    }

    .thought-card {
        padding: 1.5rem;
    }

    header {
        margin-bottom: 2rem;
        padding: 2rem 0;
    }
}

@media (max-width: 480px) {
    .title {
        font-size: 2rem;
    }

    section p {
        font-size: 1rem;
    }

    .generate-btn {
        padding: 0.8rem 2rem;
        font-size: 1rem;
    }
}

/* Smooth scrolling */
html {
    scroll-behavior: smooth;
}

/* Selection styling */
::selection {
    background: var(--accent);
    color: white;
}

::-moz-selection {
    background: var(--accent);
    color: white;
}