:root {
    /* Colors */
    --color-bg-primary: #050508;
    /* Deep Black/Blue */
    --color-bg-secondary: #0a0a10;
    --color-accent-primary: #00f0ff;
    /* Neon Cyan */
    --color-accent-glow: rgba(0, 240, 255, 0.4);
    --color-accent-secondary: #7000ff;
    /* Electric Violet */
    --color-text-primary: #ffffff;
    --color-text-secondary: #b3b3c2;
    --color-text-muted: #6e6e80;

    /* Surfaces & Borders (Dark) */
    --surface-1: rgba(255, 255, 255, 0.045);
    --surface-2: rgba(255, 255, 255, 0.075);
    --surface-3: rgba(255, 255, 255, 0.11);
    --border-subtle: rgba(255, 255, 255, 0.12);
    --border-strong: rgba(255, 255, 255, 0.2);

    /* Code Colors */
    --syntax-keyword: #ff0055;
    /* Red/Pink */
    --syntax-string: #00ff9d;
    /* Green */
    --syntax-val: #fddc00;
    /* Yellow */
    --syntax-var: #00f0ff;
    /* Cyan */

    /* Glassmorphism */
    --glass-bg: var(--surface-2);
    --glass-border: var(--border-subtle);
    --glass-highlight: rgba(255, 255, 255, 0.24);
    --glass-blur: 16px;
    --glass-shadow: 0 12px 32px 0 rgba(0, 0, 0, 0.45), inset 0 1px 0 rgba(255, 255, 255, 0.05);

    /* Typography */
    --font-heading: 'Sora', sans-serif;
    --font-body: 'Inter', sans-serif;
    --font-mono: 'Fira Code', monospace;

    /* Spacing */
    --container-width: 1200px;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 5rem;
    --header-height: 80px;

    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-medium: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
    scroll-behavior: smooth;
    scroll-padding-top: var(--header-height);
}

body {
    background-color: var(--color-bg-primary);
    color: var(--color-text-primary);
    font-family: var(--font-body);
    line-height: 1.6;
    overflow-x: hidden;
}

/* Background Grid */
.hero-bg-grid {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image:
        linear-gradient(var(--glass-border) 1px, transparent 1px),
        linear-gradient(90deg, var(--glass-border) 1px, transparent 1px);
    background-size: 40px 40px;
    opacity: 0.07;
    z-index: -1;
    pointer-events: none;
    mask-image: radial-gradient(circle at center, black 40%, transparent 80%);
}

h1,
h2,
h3,
h4 {
    font-family: var(--font-heading);
    color: var(--color-text-primary);
    line-height: 1.2;
}

a {
    text-decoration: none;
    color: inherit;
    transition: var(--transition-fast);
}

img {
    max-width: 100%;
    display: block;
}

.container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 var(--spacing-sm);
}

/* Utilities */
.highlight-text {
    color: var(--color-text-primary);
    font-weight: 700;
}

.highlight-text-alt {
    color: var(--color-accent-primary);
    text-shadow: 0 0 15px var(--color-accent-glow);
}

.text-left {
    text-align: left !important;
}

.text-center {
    text-align: center !important;
}

.glass-card {
    background: var(--glass-bg);
    backdrop-filter: blur(var(--glass-blur));
    border: 1px solid var(--glass-border);
    border-radius: 12px;
    box-shadow: var(--glass-shadow);
}

.section-padding {
    padding: var(--spacing-lg) 0;
}

/* Buttons */
.button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 1rem 2rem;
    font-weight: 600;
    border-radius: 4px;
    /* More techy, less rounded */
    cursor: pointer;
    transition: var(--transition-medium);
    font-family: var(--font-mono);
    font-size: 0.9rem;
    letter-spacing: 0.5px;
}

.button.primary {
    background: var(--color-accent-primary);
    color: #000;
    border: 1px solid var(--color-accent-primary);
    box-shadow: 0 0 15px var(--color-accent-glow);
}

.button.primary:hover {
    background: #fff;
    border-color: #fff;
    box-shadow: 0 0 25px rgba(255, 255, 255, 0.5);
    transform: translateY(-2px);
}

.button.ghost {
    background: transparent;
    border: 1px solid var(--glass-border);
    color: var(--color-text-secondary);
}

.button.ghost:hover {
    border-color: var(--color-accent-primary);
    color: var(--color-accent-primary);
    box-shadow: inset 0 0 10px rgba(0, 240, 255, 0.1);
}

/* Header */
.site-header {
    height: var(--header-height);
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 100;
    background: rgba(5, 5, 8, 0.9);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--glass-border);
    display: flex;
    align-items: center;
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 100%;
}

.logo-container {
    font-family: var(--font-heading);
    font-weight: 700;
    font-size: 1.5rem;
    letter-spacing: -1px;
    display: flex;
    align-items: center;
}

.logo-blue {
    color: var(--color-accent-primary);
    text-shadow: 0 0 10px rgba(0, 240, 255, 0.5);
}

.logo-white {
    color: var(--color-text-primary);
    text-shadow: 0 0 10px rgba(255, 255, 255, 0.3);
}

.desktop-nav {
    display: flex;
    align-items: center;
    gap: 2rem;
}

.desktop-nav a {
    font-family: var(--font-mono);
    font-size: 0.9rem;
    color: var(--color-text-secondary);
}

.desktop-nav a:hover,
.desktop-nav a.highlight-link {
    color: var(--color-accent-primary);
}

.mobile-nav-toggle {
    display: none;
    background: none;
    border: none;
    flex-direction: column;
    gap: 6px;
    cursor: pointer;
}

.mobile-nav-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background-color: var(--color-text-primary);
}

/* Hero */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    position: relative;
    padding-top: var(--header-height);
}

.hero-content-centered {
    text-align: left;
    max-width: 900px;
    margin: 0 auto;
}

.typewriter-container {
    font-family: var(--font-mono);
    color: var(--color-accent-primary);
    margin-bottom: 1.5rem;
    font-size: 1rem;
    display: flex;
    align-items: center;
}

.cursor {
    animation: blink 1s step-end infinite;
    color: var(--color-accent-primary);
    margin-left: 2px;
}

@keyframes blink {
    50% {
        opacity: 0;
    }
}

.hero-title {
    font-size: 3.5rem;
    margin-bottom: 1.5rem;
    font-weight: 600;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--color-text-secondary);
    font-weight: 400;
    margin-bottom: 3rem;
    max-width: 700px;
    line-height: 1.8;
}

.hero-actions {
    display: flex;
    gap: 1.5rem;
}

/* Syntax Highlighting Classes */
.syntax-keyword {
    color: var(--syntax-keyword);
}

.syntax-val {
    color: var(--syntax-val);
}

.syntax-string {
    color: var(--syntax-string);
}

.syntax-var {
    color: var(--syntax-var);
}

/* Services (3 Cards) */
.services-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
}

.service-card {
    padding: 2.5rem;
    transition: all 0.4s ease;
    position: relative;
    overflow: hidden;
    border: 1px solid var(--border-strong);
    display: flex;
    flex-direction: column;
}

.service-card:hover {
    border-color: var(--color-accent-primary);
    box-shadow: 0 0 30px rgba(0, 240, 255, 0.1);
    transform: translateY(-5px);
}

.card-header-split {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 2rem;
    font-family: var(--font-mono);
    color: var(--color-text-secondary);
    font-size: 0.9rem;
}

.card-number {
    color: var(--color-accent-primary);
    font-weight: bold;
}

.card-title {
    font-size: 1.8rem;
    margin-bottom: 1rem;
}

.card-desc {
    color: var(--color-text-secondary);
    margin-bottom: 2rem;
}

.terminal-list {
    list-style: none;
    font-family: var(--font-mono);
    font-size: 0.9rem;
    color: var(--color-text-muted);
}

.terminal-list li {
    margin-bottom: 0.8rem;
}

/* Core Values Section */
.values-section {
    position: relative;
}

.values-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
}

.value-item {
    padding: 2rem;
    text-align: left;
}

.value-item h3 {
    color: var(--color-accent-primary);
    margin-bottom: 1rem;
    font-size: 1.25rem;
    font-family: var(--font-mono);
}

.value-item p {
    color: var(--color-text-secondary);
    font-size: 0.95rem;
}

/* About Section */
.code-block-wrapper {
    max-width: 800px;
    margin: 0 auto;
    background: rgba(0, 0, 0, 0.3);
    padding: 0;
}

.code-header {
    background: var(--surface-1);
    padding: 0.8rem 1.5rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    border-bottom: 1px solid var(--glass-border);
}

.dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
}

.red {
    background: #FF5F56;
}

.yellow {
    background: #FFBD2E;
}

.green {
    background: #27C93F;
}

.filename {
    margin-left: 1rem;
    font-family: var(--font-mono);
    font-size: 0.85rem;
    color: var(--color-text-secondary);
}

.code-content {
    padding: 2rem;
    font-family: var(--font-mono);
    font-size: 0.95rem;
    line-height: 1.8;
}

.comment {
    color: var(--color-text-muted);
}

.code-narrative {
    color: var(--color-text-secondary);
}

/* Stack Section */
.stack-section {
    background: linear-gradient(to bottom, transparent, rgba(0, 240, 255, 0.02));
}

.section-title {
    font-family: var(--font-mono);
    font-size: 2rem;
    color: var(--color-text-primary);
    text-align: center;
    margin-bottom: 3rem;
}

.stack-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
}

.stack-group {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.stack-label {
    font-family: var(--font-mono);
    color: var(--color-accent-primary);
    margin-bottom: 1.5rem;
    font-size: 1rem;
}

.tags-container {
    display: flex;
    flex-wrap: wrap;
    gap: 0.8rem;
    justify-content: center;
}

.tech-tag {
    background: var(--surface-1);
    border: 1px solid var(--border-subtle);
    padding: 0.5rem 1rem;
    font-family: var(--font-mono);
    font-size: 0.8rem;
    border-radius: 4px;
    color: var(--color-text-secondary);
    transition: var(--transition-fast);
}

.tech-tag:hover {
    border-color: var(--color-accent-primary);
    color: var(--color-text-primary);
    background: rgba(0, 240, 255, 0.1);
}

/* Contact */
.contact-container-centered {
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
}

.contact-header {
    font-family: var(--font-mono);
    font-size: 2rem;
    margin-bottom: 1rem;
    color: var(--color-accent-primary);
}

.contact-sub {
    margin-bottom: 3rem;
    color: var(--color-text-secondary);
}

.contact-data {
    margin-bottom: 3rem;
    padding: 2rem;
}

.contact-row {
    font-family: var(--font-mono);
    margin-bottom: 0.5rem;
}

.contact-row .label {
    color: var(--color-text-muted);
    margin-right: 1rem;
}

.contact-row .value {
    color: var(--color-text-primary);
}

.contact-row .value:hover {
    color: var(--color-accent-primary);
}

.contact-form {
    text-align: left;
    padding: 3rem;
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-size: 0.9rem;
    color: var(--color-text-secondary);
    font-family: var(--font-mono);
}

.form-group input,
.form-group textarea,
.form-group select {
    width: 100%;
    background: var(--surface-1);
    border: 1px solid var(--border-subtle);
    padding: 1rem;
    color: var(--color-text-primary);
    font-family: var(--font-body);
    font-size: 1rem;
    border-radius: 4px;
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--color-accent-primary);
    box-shadow: 0 0 10px rgba(0, 240, 255, 0.1);
}

.select-wrapper {
    position: relative;
}

/* Footer */
.site-footer {
    border-top: 1px solid var(--glass-border);
    padding: 3rem 0;
    margin-top: 5rem;
    background: #020203;
}

.footer-content-wrapper {
    display: flex;
    flex-direction: column;
    gap: 3rem;
}

.footer-usp {
    text-align: center;
    font-size: 1.2rem;
    font-family: var(--font-heading);
    color: var(--color-text-primary);
    max-width: 800px;
    margin: 0 auto;
    line-height: 1.5;
}

.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 2rem;
    border-top: 1px solid var(--glass-border);
    width: 100%;
}

.footer-brand {
    font-family: var(--font-mono);
    color: var(--color-text-secondary);
}

.footer-links {
    display: flex;
    gap: 2rem;
}

.footer-links a {
    color: var(--color-text-secondary);
    font-size: 0.9rem;
}

.footer-links a:hover {
    color: var(--color-accent-primary);
}

/* Mobile Nav Styles */
.mobile-nav {
    position: fixed;
    top: var(--header-height);
    right: -90%;
    width: 90%;
    height: calc(100vh - var(--header-height));
    background: var(--color-bg-primary);
    padding: 2rem;
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    transition: var(--transition-medium);
    z-index: 99;
    border-top: 1px solid var(--glass-border);
}

.mobile-nav.active {
    right: 0;
}

.mobile-nav a {
    font-size: 1.5rem;
    font-family: var(--font-mono);
    color: var(--color-text-secondary);
}

.mobile-nav a:hover {
    color: var(--color-accent-primary);
}

.mobile-menu-overlay {
    position: fixed;
    top: var(--header-height);
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.55);
    opacity: 0;
    pointer-events: none;
    transition: opacity var(--transition-medium);
    z-index: 98;
}

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

/* ================================
   THEME TOGGLE & LIGHT MODE
   ================================ */

/* Brand Group (Logo + Theme Toggle) */
.brand-group {
    display: flex;
    align-items: center;
    gap: 1rem;
}

/* Theme Toggle Button (Command Style) */
.theme-toggle-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: 6px;
    cursor: pointer;
    font-family: var(--font-mono);
    font-size: 0.85rem;
    color: var(--color-accent-primary);
    transition: var(--transition-fast);
    padding: 0.4rem 0.8rem;
    height: auto;
    line-height: 1;
}

.theme-toggle-btn:hover {
    border-color: var(--color-accent-primary);
    box-shadow: 0 0 12px var(--color-accent-glow);
    background: rgba(0, 240, 255, 0.1);
}

[data-theme="light"] .theme-toggle-btn:hover {
    background: rgba(8, 145, 178, 0.1);
}

.theme-toggle-btn:focus-visible {
    outline: 2px solid var(--color-accent-primary);
    outline-offset: 2px;
}

/* Command text visibility */
.cmd-light {
    display: none;
}

.cmd-dark {
    display: inline;
}

[data-theme="light"] .cmd-light {
    display: inline;
}

[data-theme="light"] .cmd-dark {
    display: none;
}

/* Mobile theme toggle */
.theme-toggle-btn.mobile {
    font-size: 1.2rem;
    margin-top: 1.5rem;
    padding: 1rem 1.5rem;
    width: auto;
    justify-content: center;
    border-radius: 8px;
}

/* ================================
   LIGHT MODE VARIABLES
   ================================ */

[data-theme="light"] {
    /* Colors - Light Mode */
    --color-bg-primary: #F8FAFC;
    --color-bg-secondary: #F1F5F9;
    --color-accent-primary: #0891B2;
    --color-accent-glow: rgba(8, 145, 178, 0.2);
    --color-accent-secondary: #7C3AED;
    --color-text-primary: #0F172A;
    --color-text-secondary: #475569;
    --color-text-muted: #64748B;

    /* Surfaces & Borders (Light) */
    --surface-1: rgba(255, 255, 255, 0.7);
    --surface-2: rgba(255, 255, 255, 0.85);
    --surface-3: rgba(255, 255, 255, 0.95);
    --border-subtle: rgba(15, 23, 42, 0.12);
    --border-strong: rgba(15, 23, 42, 0.2);

    /* Code Colors - Light */
    --syntax-keyword: #DB2777;
    --syntax-string: #059669;
    --syntax-val: #CA8A04;
    --syntax-var: #0891B2;

    /* Glassmorphism - Light */
    --glass-bg: rgba(255, 255, 255, 0.85);
    --glass-border: rgba(15, 23, 42, 0.1);
    --glass-highlight: rgba(15, 23, 42, 0.05);
    --glass-shadow: 0 8px 32px 0 rgba(15, 23, 42, 0.08);
}

/* ================================
   LIGHT MODE SPECIFIC STYLES
   ================================ */

/* Header */
[data-theme="light"] .site-header {
    background: rgba(248, 250, 252, 0.92);
    border-bottom-color: rgba(15, 23, 42, 0.08);
}

/* Hero Background Grid */
[data-theme="light"] .hero-bg-grid {
    background-image:
        linear-gradient(rgba(15, 23, 42, 0.06) 1px, transparent 1px),
        linear-gradient(90deg, rgba(15, 23, 42, 0.06) 1px, transparent 1px);
    opacity: 0.6;
}

/* Logo */
[data-theme="light"] .logo-blue {
    text-shadow: none;
    color: var(--color-accent-primary);
}

[data-theme="light"] .logo-white {
    color: var(--color-text-primary);
    text-shadow: none;
}

/* Highlight Text */
[data-theme="light"] .highlight-text-alt {
    text-shadow: none;
}

/* Primary Button */
[data-theme="light"] .button.primary {
    background: var(--color-accent-primary);
    color: #ffffff;
    border-color: var(--color-accent-primary);
    box-shadow: 0 4px 14px var(--color-accent-glow);
}

[data-theme="light"] .button.primary:hover {
    background: #0E7490;
    border-color: #0E7490;
    box-shadow: 0 6px 20px rgba(8, 145, 178, 0.35);
    transform: translateY(-2px);
}

/* Ghost Button */
[data-theme="light"] .button.ghost {
    border-color: rgba(15, 23, 42, 0.2);
    color: var(--color-text-secondary);
}

[data-theme="light"] .button.ghost:hover {
    border-color: var(--color-accent-primary);
    color: var(--color-accent-primary);
    box-shadow: inset 0 0 10px rgba(8, 145, 178, 0.1);
}

/* Service Cards */
[data-theme="light"] .service-card {
    border-color: rgba(15, 23, 42, 0.08);
    background: var(--glass-bg);
}

[data-theme="light"] .service-card:hover {
    border-color: var(--color-accent-primary);
    box-shadow: 0 8px 30px rgba(8, 145, 178, 0.12);
}

/* Value Items / Glass Cards */
[data-theme="light"] .glass-card {
    box-shadow: 0 4px 20px rgba(15, 23, 42, 0.06);
}

/* Code Block */
[data-theme="light"] .code-block-wrapper {
    background: rgba(241, 245, 249, 0.95);
}

[data-theme="light"] .code-header {
    background: rgba(226, 232, 240, 0.6);
    border-bottom-color: rgba(15, 23, 42, 0.08);
}

/* Tech Tags */
[data-theme="light"] .tech-tag {
    background: rgba(241, 245, 249, 0.8);
    border-color: rgba(15, 23, 42, 0.1);
}

[data-theme="light"] .tech-tag:hover {
    background: rgba(8, 145, 178, 0.1);
    border-color: var(--color-accent-primary);
}

/* Forms */
[data-theme="light"] .form-group input,
[data-theme="light"] .form-group textarea,
[data-theme="light"] .form-group select {
    background: rgba(255, 255, 255, 0.95);
    border-color: rgba(15, 23, 42, 0.15);
    color: var(--color-text-primary);
}

[data-theme="light"] .form-group input::placeholder,
[data-theme="light"] .form-group textarea::placeholder {
    color: var(--color-text-muted);
}

[data-theme="light"] .form-group input:focus,
[data-theme="light"] .form-group textarea:focus,
[data-theme="light"] .form-group select:focus {
    border-color: var(--color-accent-primary);
    box-shadow: 0 0 0 3px rgba(8, 145, 178, 0.15);
}

/* Footer */
[data-theme="light"] .site-footer {
    background: #F1F5F9;
    border-top-color: rgba(15, 23, 42, 0.08);
}

/* Mobile Nav */
[data-theme="light"] .mobile-nav {
    background: var(--color-bg-primary);
    border-top-color: rgba(15, 23, 42, 0.08);
}

[data-theme="light"] .mobile-nav-toggle span {
    background-color: var(--color-text-primary);
}

/* Smooth theme transition */
html {
    transition: background-color 0.3s ease, color 0.3s ease;
}

body,
.site-header,
.glass-card,
.button,
.service-card {
    transition: background-color 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease, color 0.3s ease;
}

/* Responsive */
@media (max-width: 900px) {
    .container {
        padding: 0 1.5rem;
    }

    .hero-title {
        font-size: 2.5rem;
    }

    .services-grid,
    .values-grid {
        grid-template-columns: 1fr;
    }

    .desktop-nav {
        display: none;
    }

    .mobile-nav-toggle {
        display: flex;
    }

    .stack-grid {
        grid-template-columns: 1fr;
    }

    .hero-actions {
        flex-direction: column;
    }

    .button {
        width: 100%;
    }

    .footer-bottom {
        flex-direction: column;
        gap: 1.5rem;
        text-align: center;
    }
}