/* ============================================================
   Stephen Punak Design — Dark + Techy Theme
   ============================================================ */

:root {
    --color-bg: #0a0e17;
    --color-bg-alt: #0f1420;
    --color-bg-card: #141922;
    --color-bg-card-hover: #1a2030;
    --color-surface: #1a2030;
    --color-text: #c5cdd8;
    --color-text-light: #7a8599;
    --color-text-bright: #e8ecf2;
    --color-heading: #f0f2f5;
    --color-accent: #00d4ff;
    --color-accent-hover: #33dfff;
    --color-accent-dim: rgba(0, 212, 255, 0.15);
    --color-accent-glow: rgba(0, 212, 255, 0.3);
    --color-accent2: #6366f1;
    --color-border: rgba(255, 255, 255, 0.06);
    --color-border-bright: rgba(0, 212, 255, 0.2);
    --color-grid: rgba(0, 212, 255, 0.03);
    --font-body: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    --font-heading: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    --font-mono: "JetBrains Mono", "Fira Code", "SF Mono", monospace;
    --max-width: 1100px;
    --section-pad: 6rem 1.5rem;
}

/* Reset */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }

body {
    font-family: var(--font-body);
    color: var(--color-text);
    line-height: 1.7;
    background: var(--color-bg);
    -webkit-font-smoothing: antialiased;
}

/* Subtle grid background on body */
body::before {
    content: "";
    position: fixed;
    inset: 0;
    background-image:
        linear-gradient(var(--color-grid) 1px, transparent 1px),
        linear-gradient(90deg, var(--color-grid) 1px, transparent 1px);
    background-size: 60px 60px;
    pointer-events: none;
    z-index: 0;
}

a {
    color: var(--color-accent);
    text-decoration: none;
    transition: color 0.2s;
}
a:hover { color: var(--color-accent-hover); }

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

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

.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 1.5rem;
    position: relative;
    z-index: 1;
}

/* ---- Header / Nav ---- */
.site-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    background: rgba(10, 14, 23, 0.85);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--color-border);
}

.nav-container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 1.5rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 64px;
}

.logo {
    font-size: 1.05rem;
    font-weight: 700;
    color: var(--color-accent);
    letter-spacing: -0.02em;
    font-family: var(--font-mono);
}
.logo:hover { color: var(--color-accent-hover); }

.nav-links {
    list-style: none;
    display: flex;
    gap: 2rem;
    align-items: center;
}

.nav-links a {
    color: var(--color-text-light);
    font-size: 0.85rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    transition: color 0.2s;
}
.nav-links a:hover { color: var(--color-accent); }

.nav-cta {
    background: var(--color-accent);
    color: var(--color-bg) !important;
    padding: 0.5rem 1.25rem;
    border-radius: 4px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.06em;
}
.nav-cta:hover {
    background: var(--color-accent-hover);
    color: var(--color-bg) !important;
    box-shadow: 0 0 20px var(--color-accent-glow);
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 4px;
}
.nav-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--color-accent);
    transition: transform 0.2s;
}

/* ---- Hero ---- */
.hero {
    padding: 10rem 1.5rem 5rem;
    position: relative;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
}

/* Radial glow behind hero */
.hero::before {
    content: "";
    position: absolute;
    top: -20%;
    left: 50%;
    transform: translateX(-50%);
    width: 800px;
    height: 800px;
    background: radial-gradient(circle, rgba(0, 212, 255, 0.08) 0%, transparent 70%);
    pointer-events: none;
}

/* Scan line effect */
.hero::after {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: repeating-linear-gradient(
        0deg,
        transparent,
        transparent 2px,
        rgba(0, 212, 255, 0.01) 2px,
        rgba(0, 212, 255, 0.01) 4px
    );
    pointer-events: none;
}

.hero-content {
    max-width: 500px;
    position: relative;
    z-index: 1;
    flex-shrink: 0;
}

/* HMI Display in hero */
.hero-hmi {
    position: relative;
    z-index: 1;
    flex-shrink: 0;
    margin-left: 3rem;
    filter: drop-shadow(0 0 40px rgba(0, 212, 255, 0.1));
    animation: fadeInUp 0.8s ease-out 0.5s both;
}

.hmi-display {
    width: 480px;
    height: auto;
}

/* HMI Animations */
@keyframes hmiBlink {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.3; }
}

@keyframes hmiBlinkSlow {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.4; }
}

@keyframes hmiWave {
    0% { transform: translateX(0); }
    100% { transform: translateX(-20px); }
}

@keyframes hmiBarPulse {
    0%, 100% { opacity: 0.3; }
    50% { opacity: 0.7; }
}

@keyframes hmiChannelBar {
    0% { height: 0; transform: translateY(0); }
    50% { height: var(--bar-h); transform: translateY(calc(var(--bar-h) * -1)); }
    100% { height: 0; transform: translateY(0); }
}

.hmi-blink { animation: hmiBlink 1.5s ease-in-out infinite; }
.hmi-blink-slow { animation: hmiBlinkSlow 2.5s ease-in-out infinite; }
.hmi-wave1 { animation: hmiWave 3s ease-in-out infinite alternate; }
.hmi-wave2 { animation: hmiWave 4s ease-in-out infinite alternate-reverse; }
.hmi-bar1 { animation: hmiBarPulse 2s ease-in-out infinite; }
.hmi-bar2 { animation: hmiBarPulse 3s ease-in-out infinite 0.5s; }
.hmi-bar3 { animation: hmiBarPulse 2.5s ease-in-out infinite 1s; }
.hmi-bar4 { animation: hmiBarPulse 1.8s ease-in-out infinite 0.3s; }
.hmi-chbar { animation: hmiChannelBar 2.5s ease-in-out infinite; }

.hmi-gauge1 { animation: hmiBarPulse 4s ease-in-out infinite; }
.hmi-gauge2 { animation: hmiBarPulse 5s ease-in-out infinite 1s; }

.hero-tag {
    display: inline-block;
    font-family: var(--font-mono);
    font-size: 0.8rem;
    color: var(--color-accent);
    letter-spacing: 0.12em;
    text-transform: uppercase;
    margin-bottom: 1.5rem;
    padding: 0.4rem 1rem;
    border: 1px solid var(--color-border-bright);
    border-radius: 2px;
    background: var(--color-accent-dim);
}

.hero h1 {
    font-size: clamp(2.5rem, 6vw, 4rem);
    font-weight: 800;
    letter-spacing: -0.04em;
    margin-bottom: 1.5rem;
    line-height: 1.1;
}

.hero h1 .accent {
    color: var(--color-accent);
    text-shadow: 0 0 40px var(--color-accent-glow);
}

.hero-subtitle {
    font-size: 1.2rem;
    color: var(--color-text-light);
    max-width: 580px;
    margin-bottom: 2.5rem;
    line-height: 1.7;
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 0.875rem 2rem;
    border-radius: 4px;
    font-size: 0.9rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    transition: all 0.25s;
    cursor: pointer;
    border: none;
}

.btn-primary {
    background: var(--color-accent);
    color: var(--color-bg);
}
.btn-primary:hover {
    background: var(--color-accent-hover);
    color: var(--color-bg);
    box-shadow: 0 0 30px var(--color-accent-glow), 0 4px 20px rgba(0, 0, 0, 0.3);
    transform: translateY(-2px);
}

.btn-outline {
    background: transparent;
    color: var(--color-accent);
    border: 1px solid var(--color-border-bright);
}
.btn-outline:hover {
    background: var(--color-accent-dim);
    color: var(--color-accent-hover);
    border-color: var(--color-accent);
}

/* ---- Sections ---- */
.section {
    padding: var(--section-pad);
    position: relative;
    z-index: 1;
}

.section-alt {
    background: var(--color-bg-alt);
}

.section h2 {
    font-size: 2rem;
    margin-bottom: 0.5rem;
    letter-spacing: -0.03em;
}

.section-label {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--color-accent);
    text-transform: uppercase;
    letter-spacing: 0.15em;
    margin-bottom: 0.5rem;
    display: block;
}

.section-intro {
    font-size: 1.05rem;
    color: var(--color-text-light);
    max-width: 620px;
    margin-bottom: 3.5rem;
    line-height: 1.7;
}

/* Horizontal rule accent */
.section h2::after {
    content: "";
    display: block;
    width: 40px;
    height: 2px;
    background: var(--color-accent);
    margin-top: 1rem;
    box-shadow: 0 0 8px var(--color-accent-glow);
}

/* ---- Grid ---- */
.grid {
    display: grid;
    gap: 1.5rem;
}

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

/* Cards */
.card {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: 4px;
    padding: 2rem;
    transition: all 0.3s;
    position: relative;
    overflow: hidden;
}

/* Top edge glow on hover */
.card::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--color-accent), transparent);
    opacity: 0;
    transition: opacity 0.3s;
}

.card:hover {
    background: var(--color-bg-card-hover);
    border-color: var(--color-border-bright);
    transform: translateY(-2px);
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.3);
}
.card:hover::before { opacity: 1; }

.card-icon {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    color: var(--color-accent);
    text-shadow: 0 0 10px var(--color-accent-glow);
}

.card h3 {
    font-size: 1.05rem;
    margin-bottom: 0.75rem;
    color: var(--color-text-bright);
}

.card p {
    font-size: 0.9rem;
    color: var(--color-text-light);
    line-height: 1.65;
}

/* Industry items */
.industry-item {
    padding: 1.75rem;
    border: 1px solid var(--color-border);
    border-radius: 4px;
    background: var(--color-bg-card);
    transition: all 0.3s;
    display: flex;
    gap: 1.25rem;
    align-items: flex-start;
}
.industry-item:hover {
    border-color: var(--color-border-bright);
    background: var(--color-bg-card-hover);
}

.industry-icon {
    flex-shrink: 0;
    color: var(--color-accent);
    opacity: 0.7;
    margin-top: 0.15rem;
}

.industry-item h3 {
    font-size: 1.05rem;
    margin-bottom: 0.5rem;
    color: var(--color-text-bright);
}
.industry-item p {
    color: var(--color-text-light);
    font-size: 0.9rem;
}

/* ---- Experience List ---- */
.experience-list {
    list-style: none;
    max-width: 720px;
    margin-bottom: 3.5rem;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.75rem 2.5rem;
}

.experience-list li {
    font-size: 0.95rem;
    line-height: 1.6;
    color: var(--color-text);
    padding-left: 1.25rem;
    position: relative;
}

.experience-list li::before {
    content: "\203A";
    position: absolute;
    left: 0;
    color: var(--color-accent);
    font-weight: 700;
}

/* Stat highlights */
.experience-highlights {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1.5rem;
}

.exp-highlight {
    padding: 1.5rem;
    border: 1px solid var(--color-border);
    border-radius: 4px;
    background: var(--color-bg-card);
    text-align: center;
    transition: all 0.3s;
}

.exp-highlight:hover {
    border-color: var(--color-border-bright);
    background: var(--color-bg-card-hover);
}

.exp-number {
    display: block;
    font-family: var(--font-mono);
    font-size: 2.2rem;
    font-weight: 800;
    color: var(--color-accent);
    line-height: 1;
    margin-bottom: 0.5rem;
    text-shadow: 0 0 20px var(--color-accent-glow);
}

.exp-label {
    font-size: 0.8rem;
    color: var(--color-text-light);
    line-height: 1.4;
}

/* ---- Tech Grid ---- */
.tech-grid {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 1.5rem;
}

.tech-group {
    padding: 1.5rem;
    border: 1px solid var(--color-border);
    border-radius: 4px;
    background: var(--color-bg-card);
}

.tech-group h3 {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.12em;
    color: var(--color-accent);
    margin-bottom: 1rem;
    padding-bottom: 0.75rem;
    border-bottom: 1px solid var(--color-border);
}

.tech-group ul { list-style: none; }
.tech-group li {
    padding: 0.4rem 0;
    font-size: 0.9rem;
    color: var(--color-text);
    font-family: var(--font-mono);
    font-size: 0.85rem;
}
.tech-group li::before {
    content: "\203A ";
    color: var(--color-accent);
    margin-right: 0.25rem;
}

/* ---- Contact ---- */
.contact-section {
    background: var(--color-bg-alt);
}

.contact-layout {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
}

.contact-info-list {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.contact-item h3 {
    font-family: var(--font-mono);
    font-size: 0.7rem;
    text-transform: uppercase;
    letter-spacing: 0.12em;
    color: var(--color-accent);
    margin-bottom: 0.4rem;
}
.contact-item a,
.contact-item p {
    font-size: 1rem;
    line-height: 1.5;
    color: var(--color-text-bright);
}

/* Contact Form */
.contact-form {
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 0.4rem;
}

.form-group label {
    font-family: var(--font-mono);
    font-size: 0.7rem;
    text-transform: uppercase;
    letter-spacing: 0.12em;
    color: var(--color-text-light);
}

.form-group input,
.form-group textarea,
.form-group select {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: 4px;
    padding: 0.75rem 1rem;
    color: var(--color-text-bright);
    font-family: var(--font-body);
    font-size: 0.95rem;
    transition: border-color 0.2s, box-shadow 0.2s;
    outline: none;
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
    border-color: var(--color-accent);
    box-shadow: 0 0 0 2px var(--color-accent-dim);
}

.form-group textarea {
    resize: vertical;
    min-height: 120px;
}

.form-group select option {
    background: var(--color-bg-card);
    color: var(--color-text-bright);
}

.btn-submit {
    align-self: flex-start;
    background: var(--color-accent);
    color: var(--color-bg);
    padding: 0.875rem 2.5rem;
    border-radius: 4px;
    font-size: 0.9rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    cursor: pointer;
    border: none;
    transition: all 0.25s;
}
.btn-submit:hover {
    background: var(--color-accent-hover);
    box-shadow: 0 0 30px var(--color-accent-glow);
    transform: translateY(-1px);
}

/* ---- Footer ---- */
.site-footer {
    background: #060910;
    padding: 2rem 1.5rem;
    text-align: center;
    border-top: 1px solid var(--color-border);
}
.site-footer p {
    color: var(--color-text-light);
    font-size: 0.8rem;
    font-family: var(--font-mono);
}

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

.hero-content > * {
    animation: fadeInUp 0.6s ease-out both;
}
.hero-content > :nth-child(1) { animation-delay: 0.1s; }
.hero-content > :nth-child(2) { animation-delay: 0.2s; }
.hero-content > :nth-child(3) { animation-delay: 0.3s; }
.hero-content > :nth-child(4) { animation-delay: 0.4s; }

/* Fade-in on scroll — applied via JS */
.fade-in {
    opacity: 0;
    transform: translateY(16px);
    transition: opacity 0.5s ease-out, transform 0.5s ease-out;
}
.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

/* ---- Responsive ---- */
@media (max-width: 900px) {
    .hero {
        flex-direction: column;
        padding: 9rem 1.5rem 4rem;
        min-height: auto;
    }
    .hero-content { max-width: 100%; }
    .hero-hmi {
        margin-left: 0;
        margin-top: 3rem;
        width: 100%;
        max-width: 500px;
    }
    .hmi-display { width: 100%; }
    .grid-3 { grid-template-columns: repeat(2, 1fr); }
    .tech-grid { grid-template-columns: repeat(2, 1fr); }
    .contact-layout { grid-template-columns: 1fr; gap: 3rem; }
}

@media (max-width: 640px) {
    :root { --section-pad: 4rem 1.25rem; }

    .nav-links { display: none; }
    .nav-links.active {
        display: flex;
        flex-direction: column;
        position: absolute;
        top: 64px;
        left: 0;
        right: 0;
        background: rgba(10, 14, 23, 0.95);
        backdrop-filter: blur(12px);
        border-bottom: 1px solid var(--color-border);
        padding: 1rem 1.5rem;
        gap: 1rem;
    }
    .nav-toggle { display: flex; }

    .hero { padding: 8rem 1.25rem 3rem; }
    .hero h1 { font-size: 2.2rem; }
    .hero-subtitle { font-size: 1rem; }
    .hero-hmi { max-width: 100%; }

    .grid-3,
    .grid-2 { grid-template-columns: 1fr; }

    .tech-grid { grid-template-columns: 1fr 1fr; }
    .contact-layout { grid-template-columns: 1fr; }
    .experience-highlights { grid-template-columns: repeat(2, 1fr); }
    .experience-list { grid-template-columns: 1fr; }
}