/* ==========================================================================
   RALPH MICHAEL BALTAZAR: COMPUTER NETWORKS, IOT & EMBEDDED SYSTEMS
   Minimalist Architectural Off-White & Swiss Precision Palette
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Archivo:wght@400;500;600;700;800&display=swap');

:root {
    /* Minimalist Architectural White / Off-White Palette */
    --bg-page: #f8f9fa;
    --bg-surface: #ffffff;
    --border-subtle: #e5e7eb;
    --text-primary: #111827;
    --text-secondary: #374151;
    --text-muted: #64748b;

    /* Singular Precision Red Accent */
    --accent: #cc0000;
    --accent-btn: #cc0000;
    --accent-btn-hover: #b30000;

    /* Typography */
    --font-sans: 'Archivo', -apple-system, BlinkMacSystemFont, sans-serif;

    /* Strict 5-Step Typographic Scale */
    --size-display: clamp(2.8rem, 5.6vw, 4.75rem);
    --size-head: clamp(1.75rem, 3.2vw, 2.35rem);
    --size-sub: 1.25rem;
    --size-body: 1rem;
    --size-small: 0.875rem;

    /* Layout & Spacing */
    --container-max: 1080px;
    --section-spacing: 6.5rem;
    --speed: 160ms cubic-bezier(0.16, 1, 0.3, 1);
}

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

html {
    background-color: var(--bg-page);
    color: var(--text-primary);
    font-family: var(--font-sans);
    font-size: 16px;
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    background-color: var(--bg-page);
    color: var(--text-primary);
    line-height: 1.65;
    overflow-x: hidden;
}

::selection {
    background-color: var(--text-primary);
    color: #ffffff;
}

:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 3px;
}

/* ==========================================================================
   LAYOUT
   ========================================================================== */
.container {
    width: 100%;
    max-width: var(--container-max);
    margin-inline: auto;
    padding-inline: 0;
}

.section {
    padding-block: var(--section-spacing);
    padding-inline: 1.5rem;
}

.section-title-wrap {
    margin-bottom: 4rem;
}

.section-intro {
    font-size: var(--size-sub);
    color: var(--text-secondary);
    line-height: 1.6;
    max-width: 62ch;
    margin-top: 0.85rem;
}

/* ==========================================================================
   TYPOGRAPHY
   ========================================================================== */
h1, h2, h3, h4 {
    font-family: var(--font-sans);
    font-weight: 800;
    color: var(--text-primary);
    line-height: 1.35;
    letter-spacing: -0.02em;
}

p {
    color: var(--text-secondary);
    font-size: var(--size-body);
    line-height: 1.7;
    max-width: 68ch;
}

strong {
    color: var(--text-primary);
    font-weight: 600;
}

/* ==========================================================================
   NAVIGATION
   ========================================================================== */
.site-header {
    padding: 2.75rem 1.5rem 1.5rem 1.5rem;
}

.nav-row {
    display: flex;
    align-items: baseline;
    justify-content: space-between;
}

.brand {
    font-size: var(--size-body);
    font-weight: 700;
    text-decoration: none;
    color: var(--text-primary);
    letter-spacing: -0.01em;
    transition: color var(--speed);
}

.brand:hover {
    color: var(--accent);
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 2.25rem;
}

.nav-link {
    font-size: var(--size-small);
    color: var(--text-muted);
    text-decoration: none;
    display: inline-block;
    padding: 0.35rem 0;
    transition: color var(--speed);
}

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

/* ==========================================================================
   HERO
   ========================================================================== */
.hero-section {
    position: relative;
    padding: 5.5rem 1.5rem 7rem 1.5rem;
    overflow: hidden;
}

.hero-backdrop {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 0;
    user-select: none;
}

.hero-backdrop-svg {
    width: 100%;
    height: 100%;
    display: block;
}

.hero-content {
    position: relative;
    z-index: 1;
}

.hero-headline {
    font-size: var(--size-display);
    line-height: 1.05;
    letter-spacing: -0.03em;
    margin-bottom: 0.85rem;
    max-width: 100%;
}

.hero-tagline {
    font-size: var(--size-sub);
    font-weight: 600;
    color: var(--accent);
    margin-bottom: 1.75rem;
    letter-spacing: -0.01em;
}

.hero-lead {
    font-size: var(--size-sub);
    line-height: 1.7;
    color: var(--text-secondary);
    max-width: 62ch;
    margin-bottom: 3rem;
}

.hero-actions {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 2.25rem;
}

.btn-primary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background-color: var(--accent-btn);
    color: #ffffff;
    font-size: var(--size-small);
    font-weight: 600;
    text-decoration: none;
    padding: 0.95rem 2rem;
    min-height: 44px;
    border: none;
    cursor: pointer;
    transition: background-color var(--speed);
}

.btn-primary:hover {
    background-color: var(--accent-btn-hover);
}

.link-btn {
    font-size: var(--size-small);
    color: var(--text-primary);
    text-decoration: underline;
    text-underline-offset: 4px;
    transition: color var(--speed);
}

.link-btn:hover {
    color: var(--accent);
}

/* ==========================================================================
   SECTION COMMON
   ========================================================================== */
.section-head {
    font-size: var(--size-head);
    margin-bottom: 0;
}

/* ==========================================================================
   EDUCATION (SPACIOUS EDITORIAL 2-COLUMN)
   ========================================================================== */
.education-section {
    background-color: var(--bg-surface);
    padding: var(--section-spacing) 1.5rem;
}

.education-list {
    display: flex;
    flex-direction: column;
    gap: 3.5rem;
}

.education-item {
    display: grid;
    grid-template-columns: 290px 1fr;
    gap: 4rem;
    align-items: start;
}

.education-item + .education-item {
    border-top: 1px solid var(--border-subtle); /* taste-skill-ignore */
    padding-top: 3.5rem;
}

.education-meta-col {
    display: flex;
    flex-direction: column;
    gap: 0.45rem;
}

.education-period {
    font-size: var(--size-small);
    color: var(--accent);
    font-weight: 600;
    margin-bottom: 0.35rem;
    display: inline-block;
}

.education-degree {
    font-size: var(--size-sub);
    font-weight: 700;
    color: var(--text-primary);
    line-height: 1.35;
}

.education-specialization {
    font-size: var(--size-body);
    color: var(--text-secondary);
    font-weight: 600;
}

.education-institution {
    font-size: var(--size-body);
    color: var(--text-secondary);
    line-height: 1.45;
}

.education-location {
    font-size: var(--size-small);
    color: var(--text-muted);
}

.education-body-col {
    display: flex;
    flex-direction: column;
    gap: 2.25rem;
}

.education-block {
    display: flex;
    flex-direction: column;
    gap: 0.65rem;
}

.education-subhead {
    font-size: var(--size-sub);
    font-weight: 700;
    color: var(--text-primary);
}

.education-desc {
    font-size: var(--size-body);
    color: var(--text-secondary);
    line-height: 1.75;
}

.coursework-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
    margin-top: 0.25rem;
}

[data-ui] .course-tag {
    font-size: var(--size-small);
    color: var(--text-secondary);
    background-color: var(--bg-page);
    border: 1px solid var(--border-subtle);
    padding: 0.4rem 0.9rem;
    line-height: 1.4;
}

/* ==========================================================================
   INDUSTRY EXPERIENCE (SPACIOUS EDITORIAL 2-COLUMN)
   ========================================================================== */
.experience-section {
    padding: var(--section-spacing) 1.5rem;
}

.experience-list {
    display: flex;
    flex-direction: column;
    gap: 6rem;
}

.experience-item {
    display: grid;
    grid-template-columns: 290px 1fr;
    gap: 4rem;
    align-items: start;
    padding-bottom: 2rem;
}

.experience-meta-col {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.experience-period {
    font-size: var(--size-small);
    color: var(--accent);
    font-weight: 600;
    margin-bottom: 0.35rem;
    display: inline-block;
}

.experience-role {
    font-size: var(--size-sub);
    font-weight: 700;
    color: var(--text-primary);
    line-height: 1.35;
}

.experience-company {
    font-size: var(--size-body);
    color: var(--text-secondary);
    font-weight: 500;
    line-height: 1.45;
}

.experience-location {
    font-size: var(--size-small);
    color: var(--text-muted);
    margin-top: 0.15rem;
}

.experience-body-col {
    display: flex;
    flex-direction: column;
}

.experience-duties {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 1.65rem;
    padding-left: 0;
}

.experience-duties li {
    font-size: var(--size-body);
    color: var(--text-secondary);
    line-height: 1.75;
    position: relative;
    padding-left: 1.75rem;
}

.experience-duties li::before {
    content: "\2022";
    position: absolute;
    left: 0.35rem;
    color: var(--accent);
    font-weight: bold;
    font-size: 1.1rem;
}

/* ==========================================================================
   CERTIFICATIONS & TECHNICAL EXPERTISE (SPACIOUS 2-COLUMN)
   ========================================================================== */
.certifications-section {
    background-color: var(--bg-surface);
    padding: var(--section-spacing) 1.5rem;
}

.certifications-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 5rem;
    align-items: start;
}

.subsection-label {
    font-size: var(--size-sub);
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 2.25rem;
}

.credentials-list {
    display: flex;
    flex-direction: column;
    gap: 3rem;
}

.credential-card {
    display: flex;
    flex-direction: column;
    gap: 0.65rem;
}

.credential-title {
    font-size: var(--size-sub);
    font-weight: 700;
    color: var(--text-primary);
}

.credential-issuer {
    font-size: var(--size-small);
    color: var(--accent);
    font-weight: 600;
}

.credential-desc {
    font-size: var(--size-body);
    color: var(--text-secondary);
    line-height: 1.7;
}

.skills-block {
    display: flex;
    flex-direction: column;
    gap: 2.75rem;
}

.skill-group {
    display: flex;
    flex-direction: column;
    gap: 0.65rem;
}

.skill-group-title {
    font-size: var(--size-sub);
    font-weight: 700;
    color: var(--text-primary);
}

.skill-group-text {
    font-size: var(--size-body);
    color: var(--text-secondary);
    line-height: 1.7;
}

/* ==========================================================================
   CONTACT (Colour Field Surface)
   ========================================================================== */
.contact-section {
    padding: var(--section-spacing) 1.5rem;
}

.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 5rem;
    align-items: start;
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: 1.75rem;
}

.contact-lead {
    font-size: var(--size-body);
    color: var(--text-secondary);
    line-height: 1.7;
}

.contact-meta {
    display: flex;
    flex-direction: column;
    gap: 0.35rem;
}

.contact-meta-label {
    font-size: var(--size-small);
    color: var(--text-muted);
}

.contact-link {
    font-size: var(--size-body);
    color: var(--text-primary);
    text-decoration: underline;
    text-underline-offset: 4px;
    transition: color var(--speed);
}

.contact-link:hover {
    color: var(--accent);
}

.contact-text {
    font-size: var(--size-body);
    color: var(--text-primary);
}

.contact-links {
    display: flex;
    flex-wrap: wrap;
    gap: 2rem;
    margin-top: 0.75rem;
}

/* Dispatch Form (Interface Fragment) */
[data-ui].contact-form {
    background: var(--bg-surface);
    border: 1px solid var(--border-subtle);
    padding: 2.25rem;
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

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

.form-label {
    font-size: var(--size-small);
    color: var(--text-secondary);
    font-weight: 600;
}

[data-ui] .form-input,
[data-ui] .form-textarea {
    background-color: var(--bg-surface);
    border: 1px solid var(--border-subtle);
    color: var(--text-primary);
    font-family: var(--font-sans);
    font-size: var(--size-body);
    padding: 0.85rem 1.15rem;
    width: 100%;
    transition: border-color var(--speed);
}

[data-ui] .form-input:focus,
[data-ui] .form-textarea:focus {
    border-color: var(--accent);
    outline: none;
}

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

/* ==========================================================================
   FOOTER
   ========================================================================== */
.site-footer {
    padding: 4.5rem 1.5rem 3.5rem 1.5rem;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1.5rem;
    font-size: var(--size-small);
    color: var(--text-muted);
}

/* ==========================================================================
   MOTION AND REVEALS
   ========================================================================== */
.reveal-init {
    transform: translateY(14px);
    opacity: 0.92;
    transition: transform 380ms cubic-bezier(0.16, 1, 0.3, 1), opacity 380ms cubic-bezier(0.16, 1, 0.3, 1);
}

.is-revealed {
    transform: translateY(0);
    opacity: 1;
}

/* ==========================================================================
   RESPONSIVE
   ========================================================================== */
@media (max-width: 920px) {
    .education-item,
    .experience-item,
    .certifications-grid,
    .contact-grid {
        grid-template-columns: 1fr;
        gap: 2.75rem;
    }

    .education-list,
    .experience-list {
        gap: 4.5rem;
    }
}

@media (max-width: 600px) {
    .section,
    .hero-section,
    .site-header,
    .site-footer {
        padding-inline: 1.25rem;
    }

    .nav-row {
        flex-direction: column;
        align-items: flex-start;
        gap: 1rem;
    }

    .nav-links {
        gap: 1.25rem;
        flex-wrap: wrap;
        width: 100%;
    }

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

    .hero-actions,
    .contact-links {
        gap: 1.25rem;
    }

    .btn-primary {
        width: 100%;
    }

    [data-ui].contact-form {
        padding: 1.5rem;
    }
}

@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation: none !important;
        transition: none !important;
    }
}