/* ============================================================
   Slow Burn Finance — Design System
   Dark warm palette · Ember accents · Anti-hustle energy
   ============================================================ */

/* --- Tokens --- */
:root {
    /* Colors */
    --bg:             #141110;
    --bg-surface:     #1e1a17;
    --bg-elevated:    #2a2420;
    --text:           #e8e0d8;
    --text-muted:     #9a918a;
    --text-faint:     #6b6360;
    --accent:         #e8a84c;
    --accent-glow:    rgba(232, 168, 76, 0.15);
    --accent-hover:   #f0bc6a;
    --border:         rgba(232, 168, 76, 0.12);
    --border-subtle:  rgba(255, 255, 255, 0.06);

    /* Typography */
    --font-body:    'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-display: 'Outfit', 'Inter', sans-serif;

    /* Spacing */
    --space-xs:  0.25rem;
    --space-sm:  0.5rem;
    --space-md:  1rem;
    --space-lg:  2rem;
    --space-xl:  3rem;
    --space-2xl: 5rem;
    --space-3xl: 8rem;

    /* Widths */
    --max-width:      720px;
    --max-width-wide: 960px;

    /* Transitions */
    --ease: cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

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

html {
    font-size: 16px;
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-body);
    color: var(--text);
    background: var(--bg);
    line-height: 1.7;
    min-height: 100vh;
}

a {
    color: var(--accent);
    text-decoration: none;
    transition: color 0.2s var(--ease);
}

a:hover {
    color: var(--accent-hover);
}

img {
    max-width: 100%;
    height: auto;
}

/* --- Layout helpers --- */
.section-inner {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 var(--space-lg);
}

/* ============================================================
   Navigation
   ============================================================ */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    background: rgba(20, 17, 16, 0.85);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--border-subtle);
}

.nav-inner {
    max-width: var(--max-width-wide);
    margin: 0 auto;
    padding: var(--space-md) var(--space-lg);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-logo {
    font-family: var(--font-display);
    font-size: 1.3rem;
    font-weight: 600;
    letter-spacing: -0.02em;
    text-decoration: none;
}

.logo-slow {
    color: var(--text);
}

.logo-burn {
    color: var(--accent);
}

.nav-links {
    display: flex;
    align-items: center;
    gap: var(--space-lg);
}

.nav-link {
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-muted);
    transition: color 0.2s var(--ease);
}

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

.nav-cta {
    background: var(--accent);
    color: var(--bg) !important;
    padding: var(--space-xs) var(--space-md);
    border-radius: 6px;
    font-weight: 600;
    transition: background 0.2s var(--ease), transform 0.2s var(--ease);
}

.nav-cta:hover {
    background: var(--accent-hover);
    transform: translateY(-1px);
}

/* ============================================================
   Hero
   ============================================================ */
.hero {
    position: relative;
    padding: var(--space-3xl) var(--space-lg) var(--space-2xl);
    overflow: hidden;
}

.hero-inner {
    max-width: var(--max-width);
    margin: 0 auto;
    position: relative;
    z-index: 1;
}

.hero-label {
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--accent);
    letter-spacing: 0.08em;
    text-transform: uppercase;
    margin-bottom: var(--space-md);
    opacity: 0;
    animation: fadeUp 0.8s var(--ease) 0.2s forwards;
}

.hero-title {
    font-family: var(--font-display);
    font-size: clamp(2.2rem, 6vw, 3.8rem);
    font-weight: 700;
    line-height: 1.15;
    letter-spacing: -0.03em;
    color: var(--text);
    margin-bottom: var(--space-lg);
    opacity: 0;
    animation: fadeUp 0.8s var(--ease) 0.4s forwards;
}

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

.hero-subtitle {
    font-size: 1.15rem;
    line-height: 1.75;
    color: var(--text-muted);
    max-width: 540px;
    opacity: 0;
    animation: fadeUp 0.8s var(--ease) 0.6s forwards;
}

/* Subtle radial glow behind hero */
.hero-ember {
    position: absolute;
    bottom: -40%;
    left: 50%;
    transform: translateX(-50%);
    width: 800px;
    height: 500px;
    background: radial-gradient(ellipse, rgba(232, 168, 76, 0.06) 0%, transparent 70%);
    pointer-events: none;
}

/* ============================================================
   Sections
   ============================================================ */
.about,
.latest-posts,
.blog-listing {
    padding: var(--space-2xl) var(--space-lg);
}

.section-title {
    font-family: var(--font-display);
    font-size: 1.6rem;
    font-weight: 600;
    letter-spacing: -0.02em;
    margin-bottom: var(--space-lg);
    color: var(--text);
}

.about-content p {
    color: var(--text-muted);
    font-size: 1.05rem;
    margin-bottom: var(--space-md);
    line-height: 1.8;
}

.about-content p:last-child {
    margin-bottom: 0;
}

/* ============================================================
   Post cards (listing)
   ============================================================ */
.post-list {
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
}

.post-card {
    display: block;
    padding: var(--space-lg);
    background: var(--bg-surface);
    border: 1px solid var(--border-subtle);
    border-radius: 12px;
    text-decoration: none;
    transition: border-color 0.3s var(--ease),
                background 0.3s var(--ease),
                transform 0.3s var(--ease);
}

.post-card:hover {
    border-color: var(--border);
    background: var(--bg-elevated);
    transform: translateY(-2px);
}

.post-date {
    font-size: 0.8rem;
    font-weight: 500;
    color: var(--text-faint);
    letter-spacing: 0.02em;
}

.post-card-title {
    font-family: var(--font-display);
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text);
    margin: var(--space-xs) 0 var(--space-sm);
    letter-spacing: -0.01em;
}

.post-excerpt {
    color: var(--text-muted);
    font-size: 0.95rem;
    line-height: 1.7;
    margin-bottom: var(--space-sm);
}

.post-read-more {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--accent);
    transition: color 0.2s var(--ease);
}

.post-card:hover .post-read-more {
    color: var(--accent-hover);
}

/* ============================================================
   Email Signup
   ============================================================ */
.signup {
    padding: var(--space-2xl) var(--space-lg);
}

.signup-card {
    background: var(--bg-surface);
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: var(--space-xl);
    text-align: center;
    position: relative;
    overflow: hidden;
}

.signup-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: linear-gradient(90deg, transparent, var(--accent), transparent);
}

.signup-title {
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text);
    margin-bottom: var(--space-sm);
}

.signup-text {
    color: var(--text-muted);
    font-size: 1rem;
    line-height: 1.7;
    max-width: 480px;
    margin: 0 auto var(--space-lg);
}

.signup-input-group {
    display: flex;
    gap: var(--space-sm);
    max-width: 420px;
    margin: 0 auto;
}

.signup-input {
    flex: 1;
    padding: 0.75rem 1rem;
    font-size: 0.95rem;
    font-family: var(--font-body);
    color: var(--text);
    background: var(--bg);
    border: 1px solid var(--border-subtle);
    border-radius: 8px;
    outline: none;
    transition: border-color 0.2s var(--ease), box-shadow 0.2s var(--ease);
}

.signup-input::placeholder {
    color: var(--text-faint);
}

.signup-input:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 3px var(--accent-glow);
}

.signup-button {
    padding: 0.75rem 1.5rem;
    font-size: 0.95rem;
    font-family: var(--font-body);
    font-weight: 600;
    color: var(--bg);
    background: var(--accent);
    border: none;
    border-radius: 8px;
    cursor: pointer;
    white-space: nowrap;
    transition: background 0.2s var(--ease), transform 0.2s var(--ease);
}

.signup-button:hover {
    background: var(--accent-hover);
    transform: translateY(-1px);
}

.signup-note {
    font-size: 0.78rem;
    color: var(--text-faint);
    margin-top: var(--space-sm);
}

.signup-compact {
    padding-top: var(--space-xl);
}

/* ============================================================
   Blog post page
   ============================================================ */
.post-header {
    padding: var(--space-3xl) 0 var(--space-xl);
}

.post-back {
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--text-faint);
    display: inline-block;
    margin-bottom: var(--space-lg);
    transition: color 0.2s var(--ease);
}

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

.post-title {
    font-family: var(--font-display);
    font-size: clamp(1.8rem, 5vw, 2.8rem);
    font-weight: 700;
    line-height: 1.2;
    letter-spacing: -0.03em;
    color: var(--text);
    margin: var(--space-sm) 0 var(--space-md);
}

.post-lede {
    font-size: 1.15rem;
    line-height: 1.7;
    color: var(--text-muted);
    max-width: 600px;
}

/* Post body prose */
.post-body {
    padding-bottom: var(--space-2xl);
}

.post-body h2 {
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text);
    margin: var(--space-xl) 0 var(--space-md);
    letter-spacing: -0.01em;
}

.post-body h3 {
    font-family: var(--font-display);
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--text);
    margin: var(--space-lg) 0 var(--space-sm);
}

.post-body p {
    color: var(--text-muted);
    font-size: 1.05rem;
    line-height: 1.85;
    margin-bottom: var(--space-md);
}

.post-body strong {
    color: var(--text);
    font-weight: 600;
}

.post-body em {
    color: var(--text);
    font-style: italic;
}

.post-body blockquote {
    border-left: 3px solid var(--accent);
    padding-left: var(--space-lg);
    margin: var(--space-lg) 0;
    color: var(--text-muted);
    font-style: italic;
}

.post-body code {
    font-size: 0.9em;
    background: var(--bg-elevated);
    padding: 0.15em 0.4em;
    border-radius: 4px;
    color: var(--accent);
}

.post-body pre {
    background: var(--bg-surface);
    border: 1px solid var(--border-subtle);
    border-radius: 8px;
    padding: var(--space-md);
    overflow-x: auto;
    margin: var(--space-lg) 0;
}

.post-body pre code {
    background: none;
    padding: 0;
    font-size: 0.88rem;
    color: var(--text);
}

.post-body ul,
.post-body ol {
    margin: var(--space-md) 0;
    padding-left: var(--space-lg);
    color: var(--text-muted);
}

.post-body li {
    margin-bottom: var(--space-xs);
    font-size: 1.05rem;
    line-height: 1.75;
}

.post-body a {
    color: var(--accent);
    text-decoration: underline;
    text-decoration-color: rgba(232, 168, 76, 0.3);
    text-underline-offset: 3px;
    transition: text-decoration-color 0.2s var(--ease);
}

.post-body a:hover {
    text-decoration-color: var(--accent);
}

.post-body hr {
    border: none;
    border-top: 1px solid var(--border-subtle);
    margin: var(--space-xl) 0;
}

/* ============================================================
   Blog listing page
   ============================================================ */
.page-title {
    font-family: var(--font-display);
    font-size: clamp(1.8rem, 4vw, 2.4rem);
    font-weight: 700;
    letter-spacing: -0.02em;
    padding-top: var(--space-3xl);
    margin-bottom: var(--space-sm);
}

.page-subtitle {
    color: var(--text-muted);
    font-size: 1.05rem;
    margin-bottom: var(--space-xl);
}

.empty-state {
    color: var(--text-faint);
    font-size: 1rem;
    font-style: italic;
    text-align: center;
    padding: var(--space-2xl) 0;
}

/* ============================================================
   Footer
   ============================================================ */
.footer {
    padding: var(--space-xl) var(--space-lg);
    border-top: 1px solid var(--border-subtle);
    margin-top: var(--space-xl);
}

.footer-inner {
    max-width: var(--max-width);
    margin: 0 auto;
    text-align: center;
}

.footer-text {
    font-size: 0.82rem;
    color: var(--text-faint);
}

/* ============================================================
   Animations
   ============================================================ */
@keyframes fadeUp {
    from {
        opacity: 0;
        transform: translateY(16px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Observable elements animated on scroll */
.fade-in {
    opacity: 0;
    transform: translateY(12px);
    transition: opacity 0.6s var(--ease), transform 0.6s var(--ease);
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

/* ============================================================
   Responsive
   ============================================================ */
@media (max-width: 640px) {
    .nav-inner {
        padding: var(--space-sm) var(--space-md);
    }

    .nav-links {
        gap: var(--space-md);
    }

    .nav-link:not(.nav-cta) {
        font-size: 0.82rem;
    }

    .hero {
        padding: calc(var(--space-3xl) - 1rem) var(--space-md) var(--space-xl);
    }

    .section-inner {
        padding: 0 var(--space-md);
    }

    .signup-input-group {
        flex-direction: column;
    }

    .signup-card {
        padding: var(--space-lg);
    }

    .post-header {
        padding-top: calc(var(--space-3xl) - 1rem);
    }
}