:root {
    --bg-color: #faf4ed;
    --text-color: #575279;
    --secondary-text: #797593;
    --accent-color: #575279;
    --grid-color: #575279;
    --card-bg: #fffaf3;
    --card-border: #f2e9de;
    --os-green: #16a34a;
    --accent-hover-color: #d7827e;
    --source-orange: #ea9d34;
}

.dark-theme {
    --bg-color: #191724;
    --text-color: #e0def4;
    --secondary-text: #908caa;
    --accent-color: #e0def4;
    --grid-color: #e0def4;
    --card-bg: #1f1d2e;
    --card-border: #26233a;
    --os-green: #34d399;
    --accent-hover-color: #eb6f92;
    --source-orange: #f6c177;
}

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

html {
    scroll-behavior: smooth;
    background-color: var(--bg-color);
    overscroll-behavior: none;
}

body {
    font-family: 'Fira Code', monospace;
    color: var(--text-color);
    background-color: var(--bg-color);
    line-height: 1.5;
    overflow-x: hidden;
    transition: background-color 0.4s ease, color 0.4s ease;
}

#grid-bg {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    z-index: 0;
    pointer-events: none;
}

/* Theme Toggle Button */
.theme-toggle-btn {
    position: fixed;
    top: 2rem;
    right: 2rem;
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background: transparent;
    border: 1px solid var(--card-border);
    color: var(--text-color);
    cursor: pointer;
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s ease-in-out;
}

.theme-toggle-btn:hover {
    border-color: var(--text-color);
    transform: rotate(15deg);
}

.sun-icon { display: block; }
.moon-icon { display: none; }

.dark-theme .sun-icon { display: none; }
.dark-theme .moon-icon { display: block; }

.top-left-btn {
    position: fixed;
    top: 2rem;
    left: 2rem;
    z-index: 1000;
    padding: 0.5rem 1rem; /* Smaller padding */
    font-size: 0.9rem;
}

.content-wrapper {
    position: relative;
    z-index: 1;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

/* Hero Section */
.hero-section {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
}

.hero-content {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.intro-tag {
    color: var(--secondary-text);
    font-size: 1.1rem;
    margin-bottom: 0.5rem;
    letter-spacing: 0.05em;
}

.main-title {
    font-size: clamp(1.5rem, 4vw, 2.5rem);
    font-weight: 600;
    line-height: 1.3;
    letter-spacing: -0.02em;
    margin-bottom: 2rem;
}

.main-title .separator {
    margin: 0 0.5em;
    opacity: 0.4;
}

.main-title a {
    color: inherit;
    text-decoration: none;
    transition: color 0.2s ease;
    border-bottom: 2px solid transparent;
}

.main-title a:hover {
    border-bottom-color: var(--secondary-text);
}

.description {
    font-size: clamp(1rem, 2.5vw, 1.25rem);
    color: var(--secondary-text);
    max-width: 700px;
    margin-bottom: 3rem;
    line-height: 1.6;
}

.cta-group {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1.5rem;
    flex-wrap: wrap;
}

.btn {
    padding: 1rem 2rem;
    background: var(--text-color);
    color: var(--bg-color);
    text-decoration: none;
    font-weight: 600;
    border-radius: 4px;
    transition: transform 0.15s ease, opacity 0.15s ease;
}

.btn:hover {
    transform: translateY(-2px);
    opacity: 0.9;
}

.email-info {
    color: var(--secondary-text);
    font-size: 0.9rem;
    cursor: pointer;
    transition: color 0.2s ease;
    margin-bottom: 1.5rem;
}

.email-info:hover {
    color: var(--text-color);
}

/* Clipboard Notification */
.clipboard-notification {
    position: fixed;
    bottom: 2rem;
    left: 50%;
    transform: translate(-50%, 150%);
    background: var(--card-bg);
    color: var(--text-color);
    padding: 0.75rem 1.5rem;
    border-radius: 8px;
    font-size: 0.9rem;
    font-family: 'Fira Code', monospace;
    z-index: 2000;
    opacity: 0;
    pointer-events: none;
    border: 1px solid var(--card-border);
    backdrop-filter: blur(10px);
    box-shadow: 0 10px 30px rgba(0,0,0,0.1);
    transition: opacity 0.4s cubic-bezier(0.2, 1, 0.3, 1), transform 0.4s cubic-bezier(0.2, 1, 0.3, 1);
}

.clipboard-notification.show {
    opacity: 1;
    transform: translate(-50%, 0);
}

.social-btn {
    color: var(--secondary-text);
    text-decoration: none;
    font-weight: 500;
    font-size: 0.9rem;
    padding: 0.5rem 1rem;
    border: 1px solid var(--card-border);
    border-radius: 4px;
    transition: all 0.2s ease;
}

.social-btn:hover {
    background: var(--card-bg);
    border-color: var(--text-color);
    color: var(--text-color);
}


/* Flow Settings Panel */
#flow-controls {
    z-index: 1000;
    font-family: 'Fira Code', monospace;
    font-size: 0.85rem;
    transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    position: fixed;
    bottom: 20px;
    right: 0;
    transform: translateX(calc(100% - 28px));
    display: flex;
    align-items: stretch;
}

#flow-controls.open {
    transform: translateX(0);
}

@media (max-width: 800px) {
    #flow-controls { display: none; }
}

.flow-controls-tab {
    background-color: var(--card-bg);
    border: 1px solid var(--card-border);
    border-right: none;
    border-radius: 8px 0 0 8px;
    cursor: pointer;
    writing-mode: vertical-rl;
    text-orientation: mixed;
    color: var(--secondary-text);
    padding: 10px 7px;
    font-size: 0.75rem;
    font-family: 'Fira Code', monospace;
    transition: color 0.2s ease, background-color 0.2s ease;
    align-self: center;
    flex-shrink: 0;
}

.flow-controls-tab:hover {
    color: var(--text-color);
    background-color: var(--card-border);
}

.flow-controls-panel {
    background-color: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: 8px 0 0 8px;
    min-width: 210px;
    max-height: 70vh;
    padding: 16px;
    overflow-y: auto;
    box-shadow: -4px 4px 20px rgba(0, 0, 0, 0.15);
}

.flow-controls-panel h4 {
    color: var(--text-color);
    border-bottom: 1px solid var(--card-border);
    margin: 0 0 12px;
    padding-bottom: 8px;
    font-size: 0.9rem;
    font-weight: 600;
}

.flow-control-group {
    margin-bottom: 12px;
}

.flow-control-group label {
    color: var(--secondary-text);
    margin-bottom: 4px;
    font-size: 0.78rem;
    display: block;
}

.flow-control-row {
    display: flex;
    align-items: center;
    gap: 8px;
}

.flow-control-row input[type=range] {
    flex: 1;
    accent-color: var(--accent-color);
}

.flow-control-value {
    color: var(--secondary-text);
    font-size: 0.72rem;
    min-width: 32px;
    text-align: right;
}

.flow-control-reset {
    background-color: var(--card-border);
    border: 1px solid var(--card-border);
    width: 100%;
    color: var(--secondary-text);
    cursor: pointer;
    border-radius: 4px;
    margin-top: 8px;
    padding: 6px 12px;
    font-size: 0.78rem;
    font-family: 'Fira Code', monospace;
    transition: all 0.2s ease;
}

.flow-control-reset:hover {
    background-color: var(--text-color);
    color: var(--bg-color);
    border-color: var(--text-color);
}

/* Projects Section */
.projects-section {
    padding: 10rem 0;
}

.section-label {
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 0.2em;
    color: var(--secondary-text);
    margin-bottom: 4rem;
}

.projects-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
}

@media (max-width: 1024px) {
    .projects-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .projects-grid {
        grid-template-columns: 1fr;
    }
}

.project-card {
    display: flex;
    flex-direction: column;
    height: 100%;
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    padding: 2rem;
    border-radius: 8px;
    text-decoration: none;
    color: inherit;
    transition: border-color 0.2s ease, transform 0.2s ease;
}

.project-card:hover {
    transform: translateY(-5px);
    border-color: var(--accent-hover-color);
}

.project-card h3 {
    font-size: 1.1rem;
    font-weight: 600;
    transition: color 0.2s ease;
}

.project-card:hover h3 {
    color: var(--accent-hover-color);
}

.card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
    border-bottom: 1px solid var(--card-border);
    padding-bottom: 1rem;
}

.open-source-label, .closed-source-label {
    font-size: 0.7rem;
    padding: 0.2rem 0.5rem;
    border-radius: 4px;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    font-weight: 600;
    flex-shrink: 0;
}

.open-source-label {
    color: var(--os-green);
    border: 1px solid var(--os-green);
}

.closed-source-label {
    color: var(--source-orange);
    border: 1px solid var(--source-orange);
}

.project-card p {
    color: var(--secondary-text);
    flex-grow: 1;
    margin-bottom: 1.5rem;
}

.tags {
    display: flex;
    gap: 0.8rem;
}

.tag {
    font-size: 0.8rem;
    color: var(--secondary-text);
    border: 1px solid var(--card-border);
    padding: 0.3rem 0.8rem;
    border-radius: 100px;
}