/* ==========================================================================
   Javier A. Cuevas Chabrier — Portfolio
   Design concept: "Technical Blueprint" — drafting-table aesthetic drawn
   from propulsion schematics, spec sheets, and CAD title blocks.
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Space+Grotesk:wght@500;600;700&family=IBM+Plex+Sans:wght@400;500;600&family=IBM+Plex+Mono:wght@400;500;600&display=swap');

:root {
    /* -- Color tokens -- */
    --navy-deep:   #0F2438;   /* primary dark surface (header/nav/dark cards) */
    --navy-mid:    #17385A;   /* secondary dark, borders, hover */
    --paper:       #F1F3EE;   /* light section background, drafting paper */
    --paper-line:  #DDE2D8;   /* grid/hairline on paper */
    --ink:         #16232E;   /* body text on paper */
    --ink-soft:    #4A5A66;   /* secondary text */
    --steel:       #5B7C99;   /* muted accent / rule lines */
    --thrust:      #E3A008;   /* amber accent — "thrust" */
    --thrust-dark: #B97D06;

    /* -- Type -- */
    --font-display: 'Space Grotesk', sans-serif;
    --font-body: 'IBM Plex Sans', sans-serif;
    --font-mono: 'IBM Plex Mono', monospace;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-body);
    line-height: 1.65;
    color: var(--ink);
    background:
        linear-gradient(var(--paper-line) 1px, transparent 1px) 0 0 / 100% 40px,
        linear-gradient(90deg, var(--paper-line) 1px, transparent 1px) 0 0 / 40px 100%,
        var(--paper);
}

a {
    color: inherit;
}

::selection {
    background: var(--thrust);
    color: var(--navy-deep);
}

/* Visible keyboard focus everywhere */
a:focus-visible,
button:focus-visible {
    outline: 2px solid var(--thrust);
    outline-offset: 3px;
}

.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 24px 20px 60px;
}

/* ---------------------------------------------------------------------- */
/* Header                                                                  */
/* ---------------------------------------------------------------------- */

header {
    background: var(--navy-deep);
    background-image:
        linear-gradient(rgba(255,255,255,0.05) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255,255,255,0.05) 1px, transparent 1px);
    background-size: 32px 32px;
    padding: 56px 24px 44px;
    text-align: center;
    margin-bottom: 20px;
    border-radius: 4px;
    border-bottom: 3px solid var(--thrust);
    position: relative;
}

.eyebrow-brand {
    display: inline-block;
    font-family: var(--font-mono);
    font-size: 0.75em;
    letter-spacing: 0.2em;
    color: var(--thrust);
    text-transform: uppercase;
    margin-bottom: 14px;
}

h1 {
    font-family: var(--font-display);
    font-weight: 700;
    font-size: 2.6em;
    color: #ffffff;
    letter-spacing: -0.01em;
    margin-bottom: 10px;
}

.subtitle {
    font-family: var(--font-mono);
    font-size: 1em;
    color: #B9C7D3;
    letter-spacing: 0.02em;
}

/* ---------------------------------------------------------------------- */
/* Navigation — instrument-panel style                                    */
/* ---------------------------------------------------------------------- */

nav {
    background: var(--navy-mid);
    padding: 6px;
    border-radius: 4px;
    margin-bottom: 28px;
    text-align: center;
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 4px;
}

nav a.section {
    font-family: var(--font-mono);
    font-size: 0.85em;
    letter-spacing: 0.03em;
    text-transform: uppercase;
    color: #C9D6DF;
    text-decoration: none;
    padding: 12px 16px;
    border-radius: 3px;
    transition: background 0.2s ease, color 0.2s ease;
    display: inline-block;
}

nav a.section:hover {
    background: rgba(227, 160, 8, 0.15);
    color: var(--thrust);
}

nav a.section.active {
    background: var(--thrust);
    color: var(--navy-deep);
    font-weight: 600;
}

/* ---------------------------------------------------------------------- */
/* Section shell                                                          */
/* ---------------------------------------------------------------------- */

.section {
    background: #ffffff;
    padding: 44px 40px;
    margin-bottom: 26px;
    border-radius: 4px;
    border: 1px solid var(--paper-line);
    box-shadow: 0 1px 2px rgba(15, 36, 56, 0.04);
    position: relative;
}

/* corner crop-marks — the signature detail, echoing drafting title blocks */
.section::before,
.section::after {
    content: "";
    position: absolute;
    width: 14px;
    height: 14px;
    border-color: var(--thrust);
    border-style: solid;
    opacity: 0.7;
}

.section::before {
    top: -1px;
    left: -1px;
    border-width: 2px 0 0 2px;
}

.section::after {
    bottom: -1px;
    right: -1px;
    border-width: 0 2px 2px 0;
}

.eyebrow {
    font-family: var(--font-mono);
    font-size: 0.78em;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: var(--steel);
    margin-bottom: 10px;
    display: block;
}

h2 {
    font-family: var(--font-display);
    color: var(--navy-deep);
    font-size: 2em;
    font-weight: 600;
    margin-bottom: 26px;
    padding-bottom: 14px;
    border-bottom: 2px solid var(--paper-line);
}

h3 {
    font-family: var(--font-display);
    color: var(--navy-deep);
    font-weight: 600;
    font-size: 1.3em;
    margin-top: 22px;
    margin-bottom: 12px;
}

p {
    font-size: 1.05em;
    color: var(--ink);
}

ul {
    padding-left: 1.2em;
}

li {
    margin-bottom: 6px;
}

/* ---------------------------------------------------------------------- */
/* Homepage hero                                                          */
/* ---------------------------------------------------------------------- */

.hero {
    display: grid;
    grid-template-columns: 1.3fr 1fr;
    gap: 40px;
    align-items: center;
}

.hero-photo {
    width: 100%;
    aspect-ratio: 1 / 1;
    object-fit: cover;
    border-radius: 6px;
    border: 3px solid var(--navy-deep);
}

.hero-intro p {
    margin-bottom: 18px;
}

.highlight-strip {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    margin-top: 22px;
}

.highlight-tag {
    font-family: var(--font-mono);
    font-size: 0.8em;
    letter-spacing: 0.03em;
    background: var(--navy-deep);
    color: var(--thrust);
    padding: 8px 14px;
    border-radius: 3px;
    text-transform: uppercase;
}

@media (max-width: 768px) {
    .hero {
        grid-template-columns: 1fr;
    }
    .hero-photo {
        max-width: 260px;
        margin: 0 auto;
    }
}

/* ---------------------------------------------------------------------- */
/* About grid                                                             */
/* ---------------------------------------------------------------------- */

.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
    margin-top: 20px;
}

.about-card {
    background: var(--navy-deep);
    padding: 26px;
    border-radius: 6px;
    color: #ffffff;
    border-left: 3px solid var(--thrust);
}

.about-card h3 {
    color: #ffffff;
    margin-top: 0;
}

.about-card ul {
    list-style: none;
    padding-left: 0;
}

.about-card li {
    padding: 7px 0;
    padding-left: 22px;
    position: relative;
    color: #D7DEE3;
}

.about-card li::before {
    content: "▹";
    position: absolute;
    left: 0;
    color: var(--thrust);
    font-weight: bold;
}

/* ---------------------------------------------------------------------- */
/* Experience / research / project entries                                */
/* ---------------------------------------------------------------------- */

.experience-item {
    background: var(--paper);
    padding: 24px 26px;
    margin-bottom: 20px;
    border-radius: 4px;
    border-left: 4px solid var(--navy-deep);
    transition: border-color 0.2s ease, transform 0.2s ease;
}

.experience-item:hover {
    border-color: var(--thrust);
    transform: translateX(6px);
}

.experience-item h3 {
    margin-top: 0;
}

.experience-item ul {
    margin-left: 4px;
    margin-top: 8px;
}

.experience-item li {
    margin-bottom: 8px;
}

.item-caption {
    font-size: 0.92em;
    color: var(--ink-soft);
    font-style: italic;
    margin-top: 10px;
}

/* Media gallery — replaces the old full-bleed circular image bug */
.media-gallery {
    display: flex;
    flex-wrap: wrap;
    gap: 14px;
    margin-top: 18px;
}

.media-gallery img,
.media-gallery video {
    flex: 1 1 260px;
    max-width: 100%;
    height: 260px;
    border-radius: 6px;
    border: 1px solid var(--paper-line);
}

.media-gallery img {
    object-fit: contain;
    background: var(--paper);
}

.media-gallery video {
    object-fit: cover;
}

/* ---------------------------------------------------------------------- */
/* Skills                                                                 */
/* ---------------------------------------------------------------------- */

.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
    gap: 18px;
    margin-top: 20px;
    margin-bottom: 8px;
}

.skill-card {
    background: var(--navy-deep);
    padding: 20px;
    border-radius: 6px;
    color: #ffffff;
    border-top: 3px solid var(--thrust);
}

.skill-card h3 {
    color: #ffffff;
    margin-top: 0;
    font-size: 1.1em;
    font-family: var(--font-mono);
    text-transform: uppercase;
    letter-spacing: 0.04em;
}

.skill-card p {
    color: #C9D6DF;
    font-size: 0.95em;
}

/* ---------------------------------------------------------------------- */
/* Certifications                                                         */
/* ---------------------------------------------------------------------- */

.cert-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(210px, 1fr));
    gap: 18px;
    margin-top: 20px;
}

.cert-card {
    background: var(--paper);
    padding: 28px 20px;
    border-radius: 6px;
    text-align: center;
    border: 2px solid var(--navy-deep);
}

.cert-card h3 {
    color: var(--navy-deep);
    margin: 0;
}

.cert-card p {
    font-size: 0.95em;
    color: var(--ink-soft);
    margin-top: 6px;
}

/* ---------------------------------------------------------------------- */
/* Contact & downloads                                                    */
/* ---------------------------------------------------------------------- */

.contact-info {
    display: flex;
    justify-content: center;
    gap: 20px;
    flex-wrap: wrap;
    margin-top: 20px;
}

.contact {
    background: var(--navy-deep);
    color: #ffffff;
    padding: 14px 26px;
    border-radius: 4px;
    text-decoration: none;
    transition: transform 0.2s ease, background 0.2s ease;
    font-weight: 600;
    font-family: var(--font-mono);
    font-size: 0.9em;
}

.contact:hover {
    background: var(--thrust-dark);
    transform: translateY(-3px);
}

.download {
    display: flex;
    justify-content: center;
    gap: 16px;
    flex-wrap: wrap;
    margin-top: 20px;
}

.download-item {
    background: transparent;
    color: var(--navy-deep);
    padding: 13px 24px;
    border-radius: 4px;
    text-decoration: none;
    transition: all 0.2s ease;
    font-weight: 600;
    font-family: var(--font-mono);
    font-size: 0.9em;
    border: 2px solid var(--navy-deep);
}

.download-item:hover {
    background: var(--navy-deep);
    color: #ffffff;
}

footer {
    background: transparent;
    padding: 20px;
    text-align: center;
    margin-top: 10px;
    font-family: var(--font-mono);
    font-size: 0.8em;
    color: var(--ink-soft);
    letter-spacing: 0.05em;
}

/* ---------------------------------------------------------------------- */
/* Responsive                                                             */
/* ---------------------------------------------------------------------- */

@media (max-width: 768px) {
    h1 {
        font-size: 1.9em;
    }

    h2 {
        font-size: 1.5em;
    }

    .container {
        padding: 20px 16px 48px;
    }

    header {
        padding: 40px 18px 32px;
    }

    .subtitle {
        font-size: 0.95em;
    }

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

    nav {
        flex-direction: column;
    }

    nav a.section {
        display: block;
        width: 100%;
    }

    .section {
        padding: 28px 22px;
    }

    .highlight-strip {
        gap: 8px;
    }

    .highlight-tag {
        width: 100%;
        text-align: center;
    }

    .contact-info,
    .download {
        flex-direction: column;
        align-items: stretch;
    }

    .contact,
    .download-item {
        text-align: center;
        overflow-wrap: anywhere;
    }

    .skills-grid,
    .cert-grid {
        grid-template-columns: 1fr;
    }

    .media-gallery img,
    .media-gallery video {
        flex: 1 1 100%;
        height: 220px;
    }
}

/* Respect reduced-motion preference */
@media (prefers-reduced-motion: reduce) {
    html {
        scroll-behavior: auto;
    }
    .experience-item,
    .contact,
    .download-item {
        transition: none;
    }
}