/* ==========================================================================
   CSS Custom Properties - Structured Geometry "Circuit Board" Theme
   ========================================================================== */
:root {
    --color-bg: #1e293b;
    /* Slate Gray */
    --color-bg-dark: #0f172a;
    --color-text: #e2e8f0;
    --color-copper: #ea580c;
    /* PCB Copper / Orange */
    --color-copper-glow: rgba(234, 88, 12, 0.4);
    --color-gold: #eab308;
    /* PCB Gold Contacts */
    --color-gold-glow: rgba(234, 179, 8, 0.4);
    --color-solder: #94a3b8;
    /* Silver / Gray */

    --font-heading: 'Chakra Petch', sans-serif;
    --font-mono: 'Share Tech Mono', monospace;

    --grid-size: 40px;
    --trace-width: 2px;
}

/* ==========================================================================
   Reset & Base
   ========================================================================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    scroll-padding-top: 100px;
}

body {
    background-color: var(--color-bg);
    color: var(--color-text);
    font-family: var(--font-heading);
    line-height: 1.6;
    overflow-x: hidden;
    position: relative;
    font-size: 15px;
}

h1,
h2,
h3,
h4,
.pcb-brand,
.chip-label {
    text-transform: uppercase;
}

a {
    color: inherit;
    text-decoration: none;
    transition: 0.2s ease;
}

/* ==========================================================================
   Background Grid & Traces
   ========================================================================== */
.circuit-grid {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background-image:
        linear-gradient(var(--color-bg-dark) 1px, transparent 1px),
        linear-gradient(90deg, var(--color-bg-dark) 1px, transparent 1px);
    background-size: var(--grid-size) var(--grid-size);
    z-index: -2;
}

.trace {
    position: fixed;
    background-color: var(--color-copper);
    z-index: -1;
    opacity: 0.3;
}

.trace-v {
    width: var(--trace-width);
    height: 100vh;
    top: 0;
}

.trace-h {
    height: var(--trace-width);
    width: 100vw;
    left: 0;
}

/* ==========================================================================
   Typography & Sections
   ========================================================================== */
.pcb-board {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem;
}

.pcb-section {
    padding-top: 6rem;
    margin-bottom: 6rem;
    position: relative;
}

.pcb-title {
    font-family: var(--font-mono);
    font-size: 1.8rem;
    color: var(--color-gold);
    margin-bottom: 3rem;
    display: flex;
    align-items: center;
    gap: 1rem;
    border-bottom: var(--trace-width) solid var(--color-copper);
    padding-bottom: 0.5rem;
    width: fit-content;
}

.node-dot {
    display: inline-block;
    width: 12px;
    height: 12px;
    background-color: var(--color-gold);
    border-radius: 50%;
    box-shadow: 0 0 10px var(--color-gold-glow);
}

/* ==========================================================================
   Navigation
   ========================================================================== */
.pcb-header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background-color: rgba(30, 41, 59, 0.95);
    border-bottom: 4px solid var(--color-copper);
    z-index: 1000;
    padding: 1rem 0;
}

.navbar {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.pcb-brand {
    font-weight: 700;
    font-size: 1.5rem;
    color: var(--color-gold);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.mcu-pin {
    width: 8px;
    height: 16px;
    background-color: var(--color-gold);
    display: inline-block;
}

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

.node-link {
    font-family: var(--font-mono);
    color: var(--color-solder);
    font-size: 0.9rem;
    position: relative;
}

.node-link:hover,
.node-link.active {
    color: var(--color-copper);
    text-shadow: 0 0 8px var(--color-copper-glow);
}

/* ==========================================================================
   Hero Sub-Component
   ========================================================================== */
.hero {
    min-height: 90vh;
    display: flex;
    align-items: center;
    justify-content: center;
}

.component-block {
    position: relative;
    background-color: var(--color-bg-dark);
    border: 2px solid var(--color-solder);
    padding: 4rem;
    max-width: 850px;
    box-shadow: inset 0 0 30px rgba(0, 0, 0, 0.5), 0 10px 40px rgba(0, 0, 0, 0.3);
}

.pin {
    position: absolute;
    width: 20px;
    height: 20px;
    background-color: var(--color-solder);
    border-radius: 50%;
    border: 4px solid var(--color-bg);
}

.corner-tl {
    top: -10px;
    left: -10px;
}

.corner-tr {
    top: -10px;
    right: -10px;
}

.corner-bl {
    bottom: -10px;
    left: -10px;
}

.corner-br {
    bottom: -10px;
    right: -10px;
}

.chip-mcu {
    text-align: center;
}

.chip-label {
    font-family: var(--font-mono);
    color: var(--color-copper);
    margin-bottom: 1rem;
    letter-spacing: 0.2em;
}

.chip-title {
    font-size: clamp(3rem, 6vw, 5rem);
    font-weight: 700;
    color: var(--color-gold);
    margin-bottom: 0.5rem;
    text-shadow: 2px 2px 0 var(--color-solder);
}

.chip-subtitle {
    font-family: var(--font-mono);
    color: var(--color-solder);
    font-size: 1.2rem;
    margin-bottom: 2rem;
}

.cursor {
    color: var(--color-copper);
    animation: blink 1s step-end infinite;
}

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

.chip-description {
    font-size: 1.1rem;
    color: var(--color-text);
    max-width: 600px;
    margin: 0 auto 3rem;
    border-left: 2px solid var(--color-copper);
    padding-left: 1rem;
    text-align: left;
}

.pcb-actions {
    display: flex;
    justify-content: center;
    gap: 2rem;
    flex-wrap: wrap;
}

.pcb-button {
    font-family: var(--font-mono);
    position: relative;
    display: inline-block;
    padding: 1rem 2rem;
    background-color: transparent;
    border: 2px solid var(--color-copper);
    color: var(--color-copper);
    text-transform: uppercase;
    font-weight: 600;
    cursor: pointer;
    overflow: hidden;
    transition: 0.3s ease;
}

.pcb-button.primary {
    background-color: var(--color-copper);
    color: var(--color-bg);
}

.btn-trace {
    position: absolute;
    top: 50%;
    left: -100%;
    width: 50%;
    height: 2px;
    background-color: var(--color-gold);
    transition: 0.3s ease;
}

.pcb-button:hover .btn-trace {
    left: 100%;
}

.pcb-button:hover {
    box-shadow: 0 0 15px var(--color-copper-glow);
    background-color: rgba(234, 88, 12, 0.1);
}

.pcb-button.primary:hover {
    background-color: var(--color-gold);
    border-color: var(--color-gold);
    color: var(--color-bg);
}

/* ==========================================================================
   Skills / Processors Grid
   ========================================================================== */
.pcb-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 3rem;
    padding: 0 1rem;
}

.pcb-card {
    background: var(--color-bg-dark);
    border: 2px solid var(--color-solder);
    padding: 2rem;
    position: relative;
    transition: 0.3s ease;
}

.pcb-card:hover {
    border-color: var(--color-gold);
    box-shadow: inset 0 0 20px var(--color-gold-glow);
    transform: translateY(-5px);
}

.card-trace {
    position: absolute;
    top: -20px;
    left: 20px;
    width: var(--trace-width);
    height: 20px;
    background-color: var(--color-copper);
}

.chip-square {
    width: 40px;
    height: 40px;
    background-color: var(--color-bg);
    border: 2px solid var(--color-copper);
    margin-bottom: 2rem;
    position: relative;
}

.chip-square::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 20px;
    height: 20px;
    background-color: var(--color-gold);
}

.pcb-card h3 {
    font-family: var(--font-mono);
    color: var(--color-copper);
    font-size: 1.2rem;
    margin-bottom: 1.5rem;
    border-bottom: 1px dashed var(--color-solder);
    padding-bottom: 0.5rem;
}

.pcb-list {
    list-style: none;
}

.pcb-list li {
    margin-bottom: 0.8rem;
    padding-left: 1.5rem;
    position: relative;
    font-size: 0.95rem;
}

.pcb-list li::before {
    content: '>';
    position: absolute;
    left: 0;
    color: var(--color-gold);
    font-family: var(--font-mono);
}

/* ==========================================================================
   Projects Timeline
   ========================================================================== */
.pcb-timeline {
    position: relative;
    padding-left: 3rem;
}

.timeline-trace {
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 100%;
    background-color: var(--color-copper);
}

.timeline-trace::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: -6px;
    width: 16px;
    height: 16px;
    border: 4px solid var(--color-copper);
    border-radius: 50%;
    background-color: var(--color-bg);
}

.timeline-module {
    position: relative;
    margin-bottom: 4rem;
    background: var(--color-bg-dark);
    border: 2px solid var(--color-solder);
    border-left: 4px solid var(--color-gold);
    padding: 2rem;
}

.module-node {
    position: absolute;
    top: 30px;
    left: -3.8rem;
    width: 20px;
    height: 20px;
    background-color: var(--color-gold);
    border-radius: 50%;
    border: 4px solid var(--color-bg);
    box-shadow: 0 0 10px var(--color-gold-glow);
}

.module-node::after {
    content: '';
    position: absolute;
    top: 50%;
    right: -2.3rem;
    width: 2rem;
    height: var(--trace-width);
    background-color: var(--color-copper);
    transform: translateY(-50%);
}

.module-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 1.5rem;
    flex-wrap: wrap;
    gap: 1rem;
}

.module-tool {
    font-family: var(--font-mono);
    color: var(--color-solder);
    font-size: 0.85rem;
    display: block;
    margin-bottom: 0.5rem;
}

.timeline-module h3 {
    font-size: 1.5rem;
    color: var(--color-text);
}

.module-date {
    font-family: var(--font-mono);
    background-color: var(--color-copper);
    color: var(--color-bg);
    padding: 0.3rem 0.8rem;
    font-weight: bold;
}

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

.module-tags {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

.pcb-tag {
    font-family: var(--font-mono);
    background-color: rgba(234, 179, 8, 0.1);
    color: var(--color-gold);
    padding: 0.3rem 0.8rem;
    font-size: 0.8rem;
    display: flex;
    align-items: center;
    gap: 0.4rem;
    border: 1px solid var(--color-gold);
}

.tag-dot {
    width: 6px;
    height: 6px;
    background-color: var(--color-gold);
    display: inline-block;
}

/* ==========================================================================
   Contact / Comms Module
   ========================================================================== */
.contact-module {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    background: var(--color-bg-dark);
    border: 2px solid var(--color-solder);
    padding: 3rem;
}

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

.c-pin {
    display: flex;
    align-items: center;
    gap: 1rem;
    color: var(--color-solder);
}

.c-pin:hover {
    color: var(--color-copper);
}

.pin-head {
    width: 30px;
    height: 15px;
    background-color: var(--color-solder);
    border-radius: 2px 8px 8px 2px;
    position: relative;
    transition: 0.3s ease;
}

.pin-head::after {
    content: '';
    position: absolute;
    right: -10px;
    top: 50%;
    transform: translateY(-50%);
    width: 10px;
    height: 2px;
    background-color: var(--color-solder);
    transition: 0.3s ease;
}

.c-pin:hover .pin-head,
.c-pin:hover .pin-head::after {
    background-color: var(--color-copper);
}

.pin-label {
    font-family: var(--font-mono);
}

.form-module {
    border-left: 2px dashed var(--color-solder);
    padding-left: 3rem;
}

.pcb-form {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.pcb-input {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.pcb-input label {
    font-family: var(--font-mono);
    color: var(--color-copper);
    font-size: 0.85rem;
}

.pcb-input input,
.pcb-input textarea {
    background-color: var(--color-bg);
    border: 1px solid var(--color-solder);
    color: var(--color-text);
    padding: 0.8rem;
    font-family: var(--font-mono);
    outline: none;
    transition: 0.3s ease;
}

.pcb-input input:focus,
.pcb-input textarea:focus {
    border-color: var(--color-gold);
    box-shadow: 0 0 10px rgba(234, 179, 8, 0.1);
}

.pcb-alert {
    margin-top: 1.5rem;
    padding: 1rem;
    background-color: rgba(0, 255, 65, 0.1);
    border: 1px solid #00ff41;
    color: #00ff41;
    font-family: var(--font-mono);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.alert-dot {
    width: 8px;
    height: 8px;
    background-color: #00ff41;
    border-radius: 50%;
    animation: blink 1s infinite;
}

.hidden {
    display: none;
}

/* ==========================================================================
   Footer
   ========================================================================== */
.pcb-footer {
    text-align: center;
    padding: 2rem;
    font-family: var(--font-mono);
    color: var(--color-solder);
    border-top: 4px solid var(--color-copper);
    background-color: var(--color-bg-dark);
}

/* ==========================================================================
   Animations
   ========================================================================== */
.reveal-box {
    opacity: 0;
    transform: scale(0.98) translateY(20px);
    transition: 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

.reveal-box.visible {
    opacity: 1;
    transform: scale(1) translateY(0);
}

/* ==========================================================================
   Responsive
   ========================================================================== */
@media (max-width: 900px) {
    .contact-module {
        grid-template-columns: 1fr;
        padding: 2rem;
    }

    .form-module {
        border-left: none;
        border-top: 2px dashed var(--color-solder);
        padding-left: 0;
        padding-top: 3rem;
    }

    .pcb-timeline {
        padding-left: 1.5rem;
    }

    .module-node {
        left: -2.3rem;
    }

    .module-node::after {
        display: none;
    }
}

@media (max-width: 768px) {
    .component-block {
        padding: 2rem;
    }

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

    .nav-links {
        display: none;
    }

    .pcb-section {
        margin-bottom: 4rem;
        padding-top: 4rem;
    }

    .trace-v {
        display: none;
    }
}