/* ============================================
   PROYECTOS CELAYA — Estilos
   Paleta: Manual de Identidad Visual v1.0
   ============================================ */

/* --- Custom Properties --- */
:root {
    --c-navy: #042C53;
    --c-blue: #0C447C;
    --c-accent: #185FA5;
    --c-cyan: #378ADD;
    --c-dark: #2C2C2A;
    --c-gray: #5F5E5A;
    --c-cream: #F1EFE8;
    --c-white: #FFFFFF;

    --ff-heading: 'Space Grotesk', system-ui, sans-serif;
    --ff-body: 'IBM Plex Sans', system-ui, sans-serif;
    --ff-mono: 'JetBrains Mono', monospace;

    --fs-h1: clamp(2rem, 5vw, 3.5rem);
    --fs-h2: clamp(1.6rem, 3.5vw, 2.5rem);
    --fs-h3: 1.35rem;
    --fs-body: 1rem;
    --fs-small: 0.9rem;

    --radius: 12px;
    --radius-sm: 8px;
    --shadow-sm: 0 2px 8px rgba(4, 44, 83, 0.08);
    --shadow-md: 0 8px 30px rgba(4, 44, 83, 0.12);
    --shadow-lg: 0 12px 40px rgba(4, 44, 83, 0.18);

    --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --container: 1200px;
}

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

html {
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
}

body {
    font-family: var(--ff-body);
    font-size: var(--fs-body);
    color: var(--c-dark);
    background-color: var(--c-cream);
    line-height: 1.6;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

a {
    color: inherit;
    text-decoration: none;
}

ul, ol {
    list-style: none;
}

button {
    font: inherit;
    cursor: pointer;
    border: none;
    background: none;
}

h1, h2, h3, h4 {
    font-family: var(--ff-heading);
    font-weight: 700;
    line-height: 1.2;
}

/* --- Utilities --- */
.container {
    width: 100%;
    max-width: var(--container);
    margin-inline: auto;
    padding-inline: 1.25rem;
}

.skip-link {
    position: absolute;
    top: -100%;
    left: 1rem;
    padding: 0.75rem 1.5rem;
    background: var(--c-accent);
    color: var(--c-white);
    border-radius: var(--radius-sm);
    z-index: 9999;
    font-weight: 500;
    transition: top var(--transition);
}

.skip-link:focus {
    top: 1rem;
}

/* --- Header --- */
.site-header {
    position: fixed;
    inset: 0 0 auto 0;
    background: rgba(241, 239, 232, 0.92);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    z-index: 1000;
    border-bottom: 1px solid rgba(12, 68, 124, 0.08);
    transition: box-shadow var(--transition);
}

.site-header.is-scrolled {
    box-shadow: var(--shadow-sm);
}

.nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 72px;
}

.logo {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    font-family: var(--ff-heading);
    font-size: 1.35rem;
    font-weight: 700;
    color: var(--c-dark);
    transition: color var(--transition);
}

.logo__brackets {
    color: var(--c-accent);
    font-family: var(--ff-mono);
    font-weight: 400;
}

.nav__links {
    display: flex;
    gap: 2rem;
}

.nav__links a {
    font-weight: 500;
    font-size: 0.95rem;
    position: relative;
    padding: 0.25rem 0;
    transition: color var(--transition);
}

.nav__links a::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--c-accent);
    transition: width var(--transition);
}

.nav__links a:hover,
.nav__links a:focus-visible {
    color: var(--c-accent);
}

.nav__links a:hover::after,
.nav__links a:focus-visible::after {
    width: 100%;
}

.nav__toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    padding: 0.5rem;
}

.nav__toggle-bar {
    width: 24px;
    height: 2.5px;
    background: var(--c-dark);
    border-radius: 2px;
    transition: var(--transition);
}

/* --- Hero --- */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding-top: 72px;
    overflow: hidden;
    contain: layout style;
}

.hero__bg {
    position: absolute;
    inset: 0;
    background:
        radial-gradient(ellipse 80% 60% at 75% 40%, rgba(55, 138, 221, 0.12) 0%, transparent 70%),
        radial-gradient(ellipse 50% 50% at 20% 80%, rgba(24, 95, 165, 0.06) 0%, transparent 60%);
    pointer-events: none;
    will-change: transform;
}

.hero__content {
    position: relative;
    z-index: 1;
    max-width: 750px;
}

.hero h1 {
    font-size: var(--fs-h1);
    color: var(--c-navy);
    margin-bottom: 1.25rem;
}

.highlight {
    color: var(--c-accent);
}

.hero__subtitle {
    font-size: 1.2rem;
    color: var(--c-gray);
    margin-bottom: 2.5rem;
    max-width: 600px;
}

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

/* --- Buttons --- */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.9rem 2rem;
    border-radius: var(--radius-sm);
    font-weight: 500;
    font-size: 1rem;
    transition: all var(--transition);
    white-space: nowrap;
}

.btn--primary {
    background: var(--c-accent);
    color: var(--c-white);
    box-shadow: 0 4px 14px rgba(24, 95, 165, 0.3);
}

.btn--primary:hover,
.btn--primary:focus-visible {
    background: var(--c-blue);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(24, 95, 165, 0.4);
}

.btn--secondary {
    border: 2px solid var(--c-blue);
    color: var(--c-blue);
}

.btn--secondary:hover,
.btn--secondary:focus-visible {
    background: var(--c-blue);
    color: var(--c-white);
}

.btn--full {
    width: 100%;
}

/* --- Sections --- */
section {
    padding: 5rem 0;
}

.section-header {
    text-align: center;
    margin-bottom: 3.5rem;
}

.section-header h2 {
    font-size: var(--fs-h2);
    color: var(--c-navy);
    margin-bottom: 0.75rem;
}

.section-header p {
    font-size: 1.1rem;
    color: var(--c-gray);
    max-width: 560px;
    margin-inline: auto;
}

/* --- Services --- */
.services {
    background: var(--c-white);
}

.services__grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
}

.service-card {
    padding: 2rem;
    background: var(--c-cream);
    border-radius: var(--radius);
    border: 1px solid transparent;
    transition: all var(--transition);
    contain: content;
}

.service-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
    border-color: var(--c-accent);
}

.service-card__icon {
    width: 56px;
    height: 56px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--c-accent);
    color: var(--c-white);
    border-radius: var(--radius-sm);
    margin-bottom: 1.25rem;
}

.service-card h3 {
    font-size: var(--fs-h3);
    color: var(--c-navy);
    margin-bottom: 0.75rem;
}

.service-card p {
    color: var(--c-gray);
    font-size: 0.95rem;
    line-height: 1.7;
}

/* --- About --- */
.about {
    background: var(--c-cream);
}

.about__grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.about__text h2 {
    font-size: var(--fs-h2);
    color: var(--c-navy);
    margin-bottom: 1.25rem;
}

.about__text p {
    color: var(--c-gray);
    margin-bottom: 1.25rem;
    font-size: 1.05rem;
}

.about__stats {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1.25rem;
    margin-top: 2rem;
}

.stat {
    text-align: center;
    padding: 1.5rem 1rem;
    background: var(--c-white);
    border-radius: var(--radius);
    box-shadow: var(--shadow-sm);
}

.stat__number {
    font-family: var(--ff-heading);
    font-size: 2.2rem;
    font-weight: 700;
    color: var(--c-accent);
}

.stat__suffix {
    font-family: var(--ff-heading);
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--c-accent);
}

.stat__label {
    display: block;
    color: var(--c-gray);
    font-size: var(--fs-small);
    margin-top: 0.35rem;
}

/* Code Block */
.code-block {
    background: var(--c-navy);
    padding: 2rem;
    border-radius: var(--radius);
    font-family: var(--ff-mono);
    font-size: 0.85rem;
    line-height: 1.9;
    color: var(--c-cream);
    box-shadow: var(--shadow-lg);
    overflow-x: auto;
    white-space: pre;
}

.code-comment { color: var(--c-gray); font-style: italic; }
.code-keyword { color: var(--c-cyan); }
.code-string { color: #98c379; }

/* --- Process --- */
.process {
    background: var(--c-white);
}

.process__steps {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 2rem;
    counter-reset: step;
}

.process-step {
    text-align: center;
    padding: 2rem 1.5rem;
}

.process-step__number {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 56px;
    height: 56px;
    background: var(--c-accent);
    color: var(--c-white);
    border-radius: 50%;
    font-family: var(--ff-heading);
    font-size: 1.4rem;
    font-weight: 700;
    margin-bottom: 1.25rem;
}

.process-step h3 {
    font-size: 1.2rem;
    color: var(--c-navy);
    margin-bottom: 0.75rem;
}

.process-step p {
    color: var(--c-gray);
    font-size: 0.95rem;
}

/* --- Contact --- */
.contact {
    background: var(--c-navy);
    color: var(--c-cream);
}

.contact .section-header h2 { color: var(--c-cream); }
.contact .section-header p { color: rgba(241, 239, 232, 0.75); }

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

.contact__info h3 {
    font-size: 1.6rem;
    margin-bottom: 1rem;
}

.contact__info > p {
    color: rgba(241, 239, 232, 0.8);
    margin-bottom: 2rem;
    font-size: 1.05rem;
}

.contact__details {
    font-style: normal;
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.contact__item {
    display: flex;
    align-items: center;
    gap: 1rem;
    color: rgba(241, 239, 232, 0.9);
    transition: color var(--transition);
}

a.contact__item:hover {
    color: var(--c-cyan);
}

.contact__icon {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--c-accent);
    border-radius: var(--radius-sm);
    flex-shrink: 0;
}

.contact__form {
    background: rgba(255, 255, 255, 0.05);
    padding: 2.5rem;
    border-radius: var(--radius);
    backdrop-filter: blur(8px);
}

.form-group {
    margin-bottom: 1.25rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.4rem;
    font-weight: 500;
    font-size: 0.95rem;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 0.9rem 1rem;
    background: rgba(255, 255, 255, 0.08);
    border: 1px solid rgba(241, 239, 232, 0.2);
    border-radius: var(--radius-sm);
    color: var(--c-cream);
    font-family: var(--ff-body);
    font-size: 1rem;
    transition: border-color var(--transition), background var(--transition);
}

.form-group input::placeholder,
.form-group textarea::placeholder {
    color: rgba(241, 239, 232, 0.4);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--c-cyan);
    background: rgba(255, 255, 255, 0.12);
}

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

/* --- Footer --- */
.site-footer {
    background: var(--c-dark);
    color: var(--c-cream);
    padding: 3rem 0 1.5rem;
}

.footer__grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: 3rem;
    margin-bottom: 2.5rem;
}

.footer__brand .logo {
    color: var(--c-cream);
    margin-bottom: 1rem;
}

.footer__brand p {
    color: rgba(241, 239, 232, 0.65);
    font-size: var(--fs-small);
    max-width: 320px;
}

.footer__nav h4 {
    font-size: 1rem;
    margin-bottom: 1rem;
}

.footer__nav li {
    margin-bottom: 0.6rem;
}

.footer__nav a {
    color: rgba(241, 239, 232, 0.65);
    font-size: var(--fs-small);
    transition: color var(--transition);
}

.footer__nav a:hover {
    color: var(--c-cyan);
}

.footer__bottom {
    text-align: center;
    padding-top: 1.5rem;
    border-top: 1px solid rgba(241, 239, 232, 0.1);
    font-size: var(--fs-small);
    color: rgba(241, 239, 232, 0.5);
}

/* --- Scroll Reveal Animations --- */
.reveal {
    opacity: 0;
    transform: translateY(32px);
    transition: opacity 0.7s cubic-bezier(0.4, 0, 0.2, 1),
                transform 0.7s cubic-bezier(0.4, 0, 0.2, 1);
    will-change: opacity, transform;
}

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

/* --- Responsive --- */
@media (max-width: 900px) {
    .about__grid,
    .contact__grid {
        grid-template-columns: 1fr;
        gap: 2.5rem;
    }

    .footer__grid {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
}

@media (max-width: 768px) {
    .nav__toggle {
        display: flex;
    }

    .nav__links {
        position: fixed;
        inset: 72px 0 0 0;
        flex-direction: column;
        align-items: center;
        justify-content: center;
        gap: 2rem;
        background: var(--c-cream);
        transform: translateX(100%);
        transition: transform var(--transition);
        z-index: 999;
    }

    .nav__links.is-open {
        transform: translateX(0);
    }

    .nav__links a {
        font-size: 1.2rem;
    }

    .hero__cta {
        flex-direction: column;
    }

    .hero__cta .btn {
        text-align: center;
    }

    section {
        padding: 3.5rem 0;
    }

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

@media (max-width: 480px) {
    .about__stats {
        grid-template-columns: 1fr;
    }

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

/* --- Reduced Motion --- */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }

    html {
        scroll-behavior: auto;
    }

    .reveal {
        opacity: 1;
        transform: none;
    }
}

/* --- Focus Visible --- */
:focus-visible {
    outline: 3px solid var(--c-cyan);
    outline-offset: 3px;
    border-radius: 4px;
}