/* ============================================================
   PauloDibuja — Main Stylesheet
   Mobile-first, fully responsive, premium dark theme
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Outfit:wght@300;400;500;600;700;800&family=Lora:ital,wght@0,400;0,600;1,400&display=swap');

/* ── Design Tokens ─────────────────────────────────────────── */
:root {
    /* Colors */
    --color-bg: hsl(245, 40%, 8%);
    --color-surface: hsl(252, 38%, 16%);
    --color-surface-2: hsl(252, 35%, 22%);
    --color-border: hsl(252, 30%, 30%);
    --color-primary: hsl(265, 75%, 65%);
    --color-primary-glow: hsl(265, 75%, 65%, 0.25);
    --color-accent: hsl(51, 90%, 60%);
    --color-accent-2: hsl(185, 70%, 55%);
    --color-text: hsl(240, 20%, 95%);
    --color-text-muted: hsl(240, 10%, 65%);
    --color-link: hsl(51, 90%, 60%);

    /* Typography */
    --font-sans: 'Outfit', system-ui, sans-serif;
    --font-serif: 'Lora', Georgia, serif;
    --fs-xs: clamp(0.7rem, 1.5vw, 0.8rem);
    --fs-sm: clamp(0.85rem, 2vw, 0.95rem);
    --fs-base: clamp(1rem, 2.5vw, 1.125rem);
    --fs-md: clamp(1.1rem, 3vw, 1.35rem);
    --fs-lg: clamp(1.3rem, 4vw, 1.75rem);
    --fs-xl: clamp(1.8rem, 5vw, 2.5rem);
    --fs-2xl: clamp(2.2rem, 6vw, 3.5rem);

    /* Spacing */
    --space-xs: 0.375rem;
    --space-sm: 0.75rem;
    --space-md: 1.25rem;
    --space-lg: 2rem;
    --space-xl: 3.5rem;
    --space-2xl: 6rem;

    /* Layout */
    --max-width: 860px;
    --radius-sm: 8px;
    --radius-md: 14px;
    --radius-lg: 22px;

    /* Motion */
    --ease-out: cubic-bezier(0.22, 1, 0.36, 1);
    --duration: 220ms;
}

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

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

body {
    font-family: var(--font-sans);
    font-size: var(--fs-base);
    background-color: var(--color-bg);
    color: var(--color-text);
    line-height: 1.7;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    /* subtle background texture */
    background-image:
        radial-gradient(ellipse 80% 50% at 50% -20%, hsl(265 60% 22% / 0.5), transparent),
        radial-gradient(ellipse 60% 40% at 80% 110%, hsl(185 60% 18% / 0.3), transparent);
}

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

a {
    color: var(--color-link);
    text-decoration: none;
    transition: color var(--duration) var(--ease-out),
        opacity var(--duration) var(--ease-out);
}

a:hover {
    opacity: 0.8;
}

h1,
h2,
h3,
h4,
h5,
h6 {
    font-family: var(--font-sans);
    font-weight: 700;
    line-height: 1.2;
    color: var(--color-text);
}

h1 {
    font-size: var(--fs-2xl);
}

h2 {
    font-size: var(--fs-xl);
}

h3 {
    font-size: var(--fs-lg);
}

p {
    max-width: 68ch;
}

ul {
    list-style: none;
}

/* ── Layout helpers ─────────────────────────────────────────── */
.container {
    width: 100%;
    max-width: var(--max-width);
    margin-inline: auto;
    padding-inline: var(--space-md);
}

main {
    flex: 1;
    width: 100%;
    max-width: var(--max-width);
    margin-inline: auto;
    margin-block: var(--space-xl);
    padding: var(--space-lg);
    background-color: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    box-shadow: 0 8px 40px hsl(245 40% 4% / 0.6);
    animation: fadeInUp 0.5s ease backwards;
}

@media (max-width: 600px) {
    main {
        margin-block: var(--space-md);
        padding: var(--space-md);
        border-radius: var(--radius-md);
    }
}

/* ── Navbar ─────────────────────────────────────────────────── */
.navbar {
    position: sticky;
    top: 0;
    z-index: 100;
    background: hsl(252 38% 13% / 0.85);
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
    border-bottom: 1px solid var(--color-border);
}

.navbar__inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    max-width: var(--max-width);
    margin-inline: auto;
    padding-inline: var(--space-md);
    height: 60px;
    gap: var(--space-md);
}

/* Logo */
.logo {
    font-size: var(--fs-md);
    font-weight: 800;
    background: linear-gradient(135deg, var(--color-primary) 30%, var(--color-accent-2));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    white-space: nowrap;
    letter-spacing: -0.02em;
    flex-shrink: 0;
}

/* Nav links */
.navbar ul {
    display: flex;
    align-items: center;
    gap: var(--space-xs);
    background: none;
}

.navbar li {
    display: flex;
}

.navbar a {
    display: block;
    color: var(--color-text-muted);
    font-size: var(--fs-sm);
    font-weight: 500;
    padding: var(--space-xs) var(--space-sm);
    border-radius: var(--radius-sm);
    transition: color var(--duration) var(--ease-out),
        background var(--duration) var(--ease-out);
    white-space: nowrap;
}

.navbar a:hover,
.navbar a[aria-current="page"] {
    color: var(--color-text);
    background: var(--color-surface-2);
    opacity: 1;
}

/* Hamburger button (mobile only) */
.navbar__toggle {
    display: none;
    flex-direction: column;
    justify-content: center;
    gap: 5px;
    width: 36px;
    height: 36px;
    padding: 4px;
    background: none;
    border: none;
    cursor: pointer;
    flex-shrink: 0;
}

.navbar__toggle span {
    display: block;
    width: 100%;
    height: 2px;
    background: var(--color-text);
    border-radius: 2px;
    transition: transform var(--duration) var(--ease-out),
        opacity var(--duration) var(--ease-out);
    transform-origin: center;
}

/* Hamburger → X animation */
.navbar__toggle[aria-expanded="true"] span:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
}

.navbar__toggle[aria-expanded="true"] span:nth-child(2) {
    opacity: 0;
    transform: scaleX(0);
}

.navbar__toggle[aria-expanded="true"] span:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
}

/* ── Mobile nav ─────────────────────────────────────────────── */
@media (max-width: 620px) {
    .navbar__toggle {
        display: flex;
    }

    .navbar ul {
        position: fixed;
        inset: 61px 0 auto 0;
        flex-direction: column;
        align-items: stretch;
        gap: 0;
        background: hsl(252 38% 10% / 0.97);
        backdrop-filter: blur(16px);
        -webkit-backdrop-filter: blur(16px);
        border-bottom: 1px solid var(--color-border);
        padding-block: var(--space-sm);
        transform: translateY(-110%);
        opacity: 0;
        transition: transform 300ms var(--ease-out),
            opacity 300ms var(--ease-out);
        pointer-events: none;
    }

    .navbar ul.is-open {
        transform: translateY(0);
        opacity: 1;
        pointer-events: auto;
    }

    .navbar a {
        padding: var(--space-sm) var(--space-lg);
        font-size: var(--fs-base);
        border-radius: 0;
    }

    .navbar a:hover {
        background: var(--color-surface);
    }
}

/* ── Hero Section ───────────────────────────────────────────── */
.hero {
    padding-block: var(--space-xl) var(--space-lg);
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
}

.hero h1 {
    background: linear-gradient(135deg, #fff 40%, var(--color-primary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero p {
    font-size: var(--fs-md);
    color: var(--color-text-muted);
}

.cta-button {
    display: inline-flex;
    align-items: center;
    gap: var(--space-xs);
    align-self: flex-start;
    padding: var(--space-sm) var(--space-lg);
    font-family: var(--font-sans);
    font-size: var(--fs-sm);
    font-weight: 600;
    color: var(--color-bg);
    background: linear-gradient(135deg, var(--color-primary), var(--color-accent-2));
    border-radius: 999px;
    box-shadow: 0 4px 20px var(--color-primary-glow);
    transition: transform var(--duration) var(--ease-out),
        box-shadow var(--duration) var(--ease-out),
        opacity var(--duration);
}

.cta-button:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 30px var(--color-primary-glow);
    opacity: 1;
}

/* ── Section headings ───────────────────────────────────────── */
section {
    margin-block: var(--space-xl);
}

section>h2 {
    font-size: var(--fs-lg);
    margin-bottom: var(--space-md);
    padding-bottom: var(--space-sm);
    border-bottom: 2px solid var(--color-border);
    display: flex;
    align-items: center;
    gap: var(--space-sm);
}

section>h2::before {
    content: '';
    display: inline-block;
    width: 4px;
    height: 1.2em;
    background: linear-gradient(to bottom, var(--color-primary), var(--color-accent-2));
    border-radius: 2px;
    flex-shrink: 0;
}

/* ── Links inside main ──────────────────────────────────────── */
main a:not(.cta-button):not(.read-more) {
    color: var(--color-link);
    text-decoration: underline;
    text-decoration-color: hsl(51 90% 60% / 0.35);
    text-underline-offset: 3px;
    transition: text-decoration-color var(--duration);
}

main a:not(.cta-button):not(.read-more):hover {
    text-decoration-color: var(--color-link);
    opacity: 1;
}

/* ── Blog list ──────────────────────────────────────────────── */
.blog-list h1 {
    margin-bottom: var(--space-lg);
}

.posts {
    display: flex;
    flex-direction: column;
    gap: var(--space-lg);
}

.post-preview {
    padding: var(--space-lg);
    background: var(--color-surface-2);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    transition: border-color var(--duration) var(--ease-out),
        box-shadow var(--duration) var(--ease-out),
        transform var(--duration) var(--ease-out);
}

.post-preview:hover {
    border-color: var(--color-primary);
    box-shadow: 0 4px 24px var(--color-primary-glow);
    transform: translateY(-2px);
}

.post-preview h2 {
    font-size: var(--fs-md);
    margin-bottom: var(--space-xs);
}

.post-preview h2 a {
    color: var(--color-text);
    text-decoration: none;
    transition: color var(--duration);
}

.post-preview h2 a:hover {
    color: var(--color-primary);
    opacity: 1;
}

.post-preview time {
    display: block;
    font-size: var(--fs-xs);
    color: var(--color-text-muted);
    margin-bottom: var(--space-sm);
    font-weight: 500;
    letter-spacing: 0.05em;
    text-transform: uppercase;
}

.post-preview p {
    color: var(--color-text-muted);
    font-size: var(--fs-sm);
    margin-bottom: var(--space-md);
}

.read-more {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    font-size: var(--fs-sm);
    font-weight: 600;
    color: var(--color-primary);
    transition: gap var(--duration) var(--ease-out), opacity var(--duration);
}

.read-more:hover {
    gap: 8px;
    opacity: 1;
}

/* ── Footer ─────────────────────────────────────────────────── */
.site-footer {
    width: 100%;
    border-top: 1px solid var(--color-border);
    padding-block: var(--space-lg);
    text-align: center;
    color: var(--color-text-muted);
    font-size: var(--fs-sm);
}

.site-footer .social-links {
    display: flex;
    justify-content: center;
    gap: var(--space-md);
    margin-top: var(--space-sm);
}

/* ── Utility ─────────────────────────────────────────────────── */
.text-muted {
    color: var(--color-text-muted);
}

.text-accent {
    color: var(--color-accent);
}

/* Scrollbar */
::-webkit-scrollbar {
    width: 6px;
}

::-webkit-scrollbar-track {
    background: var(--color-bg);
}

::-webkit-scrollbar-thumb {
    background: var(--color-border);
    border-radius: 99px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--color-primary);
}

/* Selection */
::selection {
    background: var(--color-primary);
    color: #fff;
}

/* ── Focus visible (accessibility) ──────────────────────────── */
:focus-visible {
    outline: 2px solid var(--color-primary);
    outline-offset: 3px;
    border-radius: var(--radius-sm);
}

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

    to {
        opacity: 1;
        transform: translateY(0);
    }
}