/* --- RESET & VARIABLES --- */
:root {
    --bg-main: #0a0a0a;
    --bg-card: #121212;
    --bg-card-hover: #181818;
    --bg-subtle: #1e1e1e;
    
    --border-light: rgba(255, 255, 255, 0.08);
    --border-hover: rgba(255, 255, 255, 0.25);
    
    --text-primary: #ffffff;
    --text-secondary: #a0a0a0;
    --text-muted: #666666;
    
    --header-bg: rgba(10, 10, 10, 0.85);
    --grid-line: rgba(255, 255, 255, 0.03);
    
    --font-heading: 'Space Grotesk', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-body: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-mono: 'SFMono-Regular', Consolas, 'Liberation Mono', Menlo, monospace;
    
    --transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
    --container-max: 1200px;
}

[data-theme="light"] {
    --bg-main: #ffffff;
    --bg-card: #f8f9fa;
    --bg-card-hover: #f1f3f5;
    --bg-subtle: #e9ecef;
    
    --border-light: rgba(0, 0, 0, 0.08);
    --border-hover: rgba(0, 0, 0, 0.25);
    
    --text-primary: #0f172a;
    --text-secondary: #475569;
    --text-muted: #64748b;
    
    --header-bg: rgba(255, 255, 255, 0.85);
    --grid-line: rgba(0, 0, 0, 0.04);
}

.header-actions {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.theme-toggle-btn {
    background: var(--bg-card);
    border: 1px solid var(--border-light);
    color: var(--text-primary);
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: var(--transition);
    font-size: 1.1rem;
}

.theme-toggle-btn:hover {
    background: var(--bg-subtle);
    border-color: var(--border-hover);
    transform: scale(1.05);
}

[data-theme="light"] .sun-icon {
    display: none;
}

[data-theme="light"] .moon-icon {
    display: inline-block;
}

:root:not([data-theme="light"]) .sun-icon {
    display: inline-block;
}

:root:not([data-theme="light"]) .moon-icon {
    display: none;
}

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

html {
    scroll-behavior: smooth;
    font-size: 16px;
    background-color: var(--bg-main);
    color: var(--text-primary);
    font-family: var(--font-body);
}

body {
    overflow-x: hidden;
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

a {
    color: inherit;
    text-decoration: none;
}

button, input, select, textarea {
    font-family: inherit;
    font-size: inherit;
}

.container {
    width: 100%;
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 1.5rem;
}

.section {
    padding: 7rem 0;
    border-bottom: 1px solid var(--border-light);
}

/* --- BUTTONS & BADGES --- */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.85rem 1.8rem;
    font-weight: 600;
    font-size: 0.95rem;
    border-radius: 4px;
    transition: var(--transition);
    cursor: pointer;
    border: 1px solid transparent;
}

.btn-primary {
    background-color: var(--text-primary);
    color: var(--bg-main);
    border-color: var(--text-primary);
}

.btn-primary:hover {
    background-color: #e2e2e2;
    transform: translateY(-2px);
    box-shadow: 0 10px 25px rgba(255, 255, 255, 0.1);
}

.btn-secondary {
    background-color: transparent;
    color: var(--text-primary);
    border-color: var(--border-light);
}

.btn-secondary:hover {
    background-color: var(--bg-subtle);
    border-color: var(--border-hover);
    transform: translateY(-2px);
}

.btn-block {
    width: 100%;
}

.badge {
    display: inline-flex;
    align-items: center;
    gap: 0.6rem;
    padding: 0.4rem 0.9rem;
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid var(--border-light);
    border-radius: 50px;
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
}

.badge-dot {
    width: 6px;
    height: 6px;
    background-color: #ffffff;
    border-radius: 50%;
    box-shadow: 0 0 10px #ffffff;
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.4; transform: scale(0.8); }
}

/* --- HEADER & NAV --- */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    padding: 1.25rem 0;
    transition: var(--transition);
    background: var(--header-bg);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid transparent;
}

.header.scrolled {
    padding: 0.9rem 0;
    border-bottom: 1px solid var(--border-light);
}

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

.brand {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    font-family: var(--font-heading);
    font-weight: 700;
    font-size: 1.25rem;
    letter-spacing: 1px;
}

.brand-symbol {
    color: var(--text-muted);
    font-weight: 800;
}

.nav {
    display: flex;
    gap: 2.5rem;
}

.nav-link {
    color: var(--text-secondary);
    font-size: 0.95rem;
    font-weight: 500;
    transition: var(--transition);
}

.nav-link:hover {
    color: var(--text-primary);
}

.nav-cta {
    padding: 0.6rem 1.2rem;
    font-size: 0.85rem;
}

/* --- HERO SECTION --- */
.hero {
    position: relative;
    padding: 11rem 0 7rem;
    border-bottom: 1px solid var(--border-light);
    overflow: hidden;
}

.hero-bg-grid {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: 
        linear-gradient(to right, var(--grid-line) 1px, transparent 1px),
        linear-gradient(to bottom, var(--grid-line) 1px, transparent 1px);
    background-size: 60px 60px;
    mask-image: radial-gradient(circle at center, black 40%, transparent 80%);
    pointer-events: none;
}

.hero-container {
    position: relative;
    z-index: 1;
    max-width: 900px;
}

.hero-title {
    font-family: var(--font-heading);
    font-size: clamp(2.5rem, 5.5vw, 4.2rem);
    font-weight: 700;
    line-height: 1.1;
    letter-spacing: -1.5px;
    margin-bottom: 1.5rem;
}

.hero-subtitle {
    font-size: clamp(1.1rem, 2vw, 1.35rem);
    color: var(--text-secondary);
    max-width: 720px;
    font-weight: 400;
    line-height: 1.6;
    margin-bottom: 2.5rem;
}

.hero-actions {
    display: flex;
    gap: 1rem;
    margin-bottom: 4.5rem;
    flex-wrap: wrap;
}

.hero-stats {
    display: flex;
    align-items: center;
    gap: 2.5rem;
    padding-top: 2.5rem;
    border-top: 1px solid var(--border-light);
}

.stat-number {
    font-family: var(--font-heading);
    font-size: 2.2rem;
    font-weight: 700;
    line-height: 1;
    margin-bottom: 0.4rem;
}

.stat-label {
    font-size: 0.85rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.stat-divider {
    width: 1px;
    height: 40px;
    background-color: var(--border-light);
}

/* --- SECTION HEADERS --- */
.section-header {
    margin-bottom: 3.5rem;
}

.section-tag {
    font-family: var(--font-mono);
    font-size: 0.85rem;
    color: var(--text-muted);
    letter-spacing: 1px;
    display: block;
    margin-bottom: 0.8rem;
}

.section-title {
    font-family: var(--font-heading);
    font-size: clamp(2rem, 3.5vw, 2.8rem);
    font-weight: 700;
    letter-spacing: -0.5px;
}

/* --- SERVICES --- */
.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 2rem;
}

.service-card {
    background-color: var(--bg-card);
    border: 1px solid var(--border-light);
    padding: 2.5rem;
    border-radius: 8px;
    transition: var(--transition);
    position: relative;
    display: flex;
    flex-direction: column;
}

.service-card:hover {
    border-color: var(--border-hover);
    transform: translateY(-4px);
    background-color: var(--bg-card-hover);
}

.service-num {
    font-family: var(--font-mono);
    font-size: 0.9rem;
    color: var(--text-muted);
    margin-bottom: 1.5rem;
}

.service-title {
    font-family: var(--font-heading);
    font-size: 1.4rem;
    font-weight: 600;
    margin-bottom: 1rem;
}

.service-desc {
    color: var(--text-secondary);
    font-size: 0.95rem;
    margin-bottom: 1.8rem;
    flex-grow: 1;
}

.service-list {
    list-style: none;
    border-top: 1px solid var(--border-light);
    padding-top: 1.2rem;
}

.service-list li {
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
    position: relative;
    padding-left: 1rem;
}

.service-list li::before {
    content: "•";
    position: absolute;
    left: 0;
    color: var(--text-muted);
}

/* --- PORTFOLIO --- */
.portfolio-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-end;
    margin-bottom: 3.5rem;
    flex-wrap: wrap;
    gap: 1.5rem;
}

.portfolio-filter {
    display: flex;
    gap: 0.5rem;
    background-color: var(--bg-card);
    padding: 0.3rem;
    border-radius: 6px;
    border: 1px solid var(--border-light);
}

.filter-btn {
    background: transparent;
    border: none;
    color: var(--text-secondary);
    padding: 0.5rem 1.2rem;
    font-size: 0.85rem;
    font-weight: 500;
    cursor: pointer;
    border-radius: 4px;
    transition: var(--transition);
}

.filter-btn.active, .filter-btn:hover {
    color: var(--text-primary);
    background-color: var(--bg-subtle);
}

.portfolio-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(480px, 1fr));
    gap: 2.5rem;
}

.portfolio-card {
    background-color: var(--bg-card);
    border: 1px solid var(--border-light);
    border-radius: 8px;
    overflow: hidden;
    transition: var(--transition);
}

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

.portfolio-image-wrapper {
    background: #161616;
    padding: 2.5rem;
    border-bottom: 1px solid var(--border-light);
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 260px;
}

.portfolio-img-box {
    padding: 0;
    overflow: hidden;
    height: 260px;
}

.portfolio-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: top left;
    filter: grayscale(40%) contrast(1.05);
    transition: var(--transition);
}

.portfolio-card:hover .portfolio-img {
    filter: grayscale(0%) contrast(1.1);
    transform: scale(1.03);
}

/* Abstract Monochrome CSS Mockups */
.portfolio-mockup {
    width: 100%;
    background: #0d0d0d;
    border: 1px solid var(--border-light);
    border-radius: 6px;
    overflow: hidden;
    box-shadow: 0 15px 30px rgba(0,0,0,0.5);
}

.mockup-header {
    height: 28px;
    background: #181818;
    border-bottom: 1px solid var(--border-light);
    display: flex;
    align-items: center;
    padding: 0 0.8rem;
    gap: 0.4rem;
}

.mockup-header .dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background-color: #333;
}

.mockup-url {
    font-family: var(--font-mono);
    font-size: 0.7rem;
    color: var(--text-muted);
    margin-left: auto;
}

.mockup-body {
    padding: 1.2rem;
    display: flex;
    gap: 1rem;
    height: 140px;
}

.mockup-dash .mockup-sidebar {
    width: 25%;
    background: #1a1a1a;
    border-radius: 4px;
}

.mockup-dash .mockup-content {
    width: 75%;
    display: flex;
    flex-direction: column;
    gap: 0.8rem;
}

.mockup-bar {
    height: 35%;
    background: #222;
    border-radius: 4px;
}

.mockup-grid-2 {
    display: flex;
    gap: 0.8rem;
    height: 60%;
}

.mockup-box {
    flex: 1;
    background: #1a1a1a;
    border-radius: 4px;
}

.mockup-kanban .mockup-column {
    flex: 1;
    background: #181818;
    border-radius: 4px;
    border-top: 2px solid #444;
}

.mockup-mobile {
    display: flex;
    justify-content: center;
    background: transparent;
    border: none;
    box-shadow: none;
}

.mockup-phone {
    width: 140px;
    height: 180px;
    background: #141414;
    border: 2px solid #333;
    border-radius: 16px;
    padding: 8px;
}

.phone-screen {
    background: #080808;
    height: 100%;
    border-radius: 10px;
    padding: 8px;
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.phone-bar { height: 12px; background: #222; border-radius: 3px; }
.phone-card { height: 40px; background: #181818; border-radius: 4px; }

.mockup-editor .mockup-lines {
    width: 100%;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.line { height: 8px; background: #222; border-radius: 2px; }
.w-75 { width: 75%; background: #333; }
.w-50 { width: 50%; }
.w-90 { width: 90%; background: #2a2a2a; }

.portfolio-info {
    padding: 2rem;
}

.portfolio-tags {
    display: flex;
    gap: 0.8rem;
    margin-bottom: 0.8rem;
}

.portfolio-tags span {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--text-muted);
    text-transform: uppercase;
}

.portfolio-title {
    font-family: var(--font-heading);
    font-size: 1.35rem;
    font-weight: 600;
    margin-bottom: 0.6rem;
}

.portfolio-link {
    color: var(--text-primary);
    display: inline-flex;
    align-items: center;
    gap: 0.3rem;
    transition: var(--transition);
}

.portfolio-link:hover {
    color: #ffffff;
    text-decoration: underline;
    text-underline-offset: 4px;
}

.external-icon {
    font-size: 0.9em;
    opacity: 0.7;
    transition: var(--transition);
}

.portfolio-card:hover .external-icon {
    opacity: 1;
    transform: translate(2px, -2px);
}

.portfolio-desc {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-bottom: 1.5rem;
}

.portfolio-tech {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.portfolio-tech span {
    background: var(--bg-subtle);
    border: 1px solid var(--border-light);
    padding: 0.25rem 0.6rem;
    border-radius: 3px;
    font-size: 0.75rem;
    color: var(--text-secondary);
    font-family: var(--font-mono);
}

/* --- PROCESS --- */
.process-steps {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 2rem;
}

.step-card {
    position: relative;
}

.step-header {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1.2rem;
}

.step-num {
    font-family: var(--font-mono);
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--text-primary);
}

.step-line {
    flex-grow: 1;
    height: 1px;
    background: var(--border-light);
}

.step-title {
    font-family: var(--font-heading);
    font-size: 1.15rem;
    font-weight: 600;
    margin-bottom: 0.6rem;
}

.step-desc {
    color: var(--text-secondary);
    font-size: 0.88rem;
}

/* --- ABOUT & TERMINAL --- */
.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.about-text {
    color: var(--text-secondary);
    font-size: 1.05rem;
    margin-bottom: 1.2rem;
}

.about-features {
    margin-top: 2.5rem;
    display: flex;
    flex-direction: column;
    gap: 1.2rem;
}

.feature-item {
    display: flex;
    gap: 1rem;
}

.feature-icon {
    font-weight: bold;
    color: var(--text-primary);
}

.feature-item h4 {
    font-size: 0.95rem;
    font-weight: 600;

}

.feature-item p {
    font-size: 0.85rem;
    color: var(--text-muted);
}

.code-terminal {
    background: #0d0d0d;
    border: 1px solid var(--border-light);
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 20px 40px rgba(0,0,0,0.6);
}

.terminal-header {
    background: #141414;
    padding: 0.8rem 1rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    border-bottom: 1px solid var(--border-light);
}

.terminal-header .dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: #333;
}

.terminal-title {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-left: auto;
}

.terminal-body {
    padding: 1.5rem;
    font-family: var(--font-mono);
    font-size: 0.82rem;
    color: #d4d4d4;
    line-height: 1.7;
    overflow-x: auto;
}

.code-keyword { color: #888; font-weight: bold; }
.code-attr { color: #ccc; }
.code-str { color: #fff; text-decoration: underline rgba(255,255,255,0.2); }

/* --- CONTACT SECTION --- */
.contact-box {
    max-width: 700px;
    margin: 0 auto;
    background: var(--bg-card);
    border: 1px solid var(--border-light);
    padding: 3.5rem;
    border-radius: 12px;
}

.contact-header {
    text-align: center;
    margin-bottom: 2.5rem;
}

.contact-subtitle {
    color: var(--text-secondary);
    font-size: 0.95rem;
    margin-top: 0.5rem;
}

.form-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    margin-bottom: 1.5rem;
}

.form-group label {
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--text-secondary);
}

.form-group input,
.form-group select,
.form-group textarea {
    background-color: var(--bg-main);
    border: 1px solid var(--border-light);
    color: var(--text-primary);
    padding: 0.8rem 1rem;
    border-radius: 4px;
    outline: none;
    transition: var(--transition);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    border-color: var(--text-primary);
}

.form-status {
    margin-top: 1rem;
    text-align: center;
    font-size: 0.88rem;
}

.form-status.success {
    color: #ffffff;
    padding: 0.8rem;
    background: rgba(255,255,255,0.05);
    border: 1px solid var(--border-hover);
    border-radius: 4px;
}

/* --- FOOTER --- */
.footer {
    padding: 3rem 0;
    background-color: var(--bg-main);
}

.footer-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1.5rem;
}

.footer-brand p {
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-top: 0.3rem;
}

.footer-copy {
    font-size: 0.82rem;
    color: var(--text-muted);
}

/* --- RESPONSIVE MEDIA QUERIES --- */
@media (max-width: 900px) {
    .about-grid {
        grid-template-columns: 1fr;
    }
    .portfolio-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .nav {
        display: none; /* Can be toggled if extended */
    }
    .form-grid {
        grid-template-columns: 1fr;
    }
    .contact-box {
        padding: 2rem 1.5rem;
    }
    .hero-stats {
        flex-direction: column;
        align-items: flex-start;
        gap: 1.5rem;
    }
    .stat-divider {
        width: 100%;
        height: 1px;
    }
}