/* ============================================
   Ohmic Website — Dark / Techy / Professional
   ============================================ */

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

:root {
    --green: #4eca6a;
    --green-dim: #3da557;
    --green-glow: rgba(78, 202, 106, 0.15);
    --green-glow-strong: rgba(78, 202, 106, 0.3);
    --bg-primary: #0e0e10;
    --bg-secondary: #151518;
    --bg-card: #1a1a1f;
    --bg-card-hover: #1f1f25;
    --border: #2a2a30;
    --border-light: #3a3a42;
    --text-primary: #f0f0f2;
    --text-secondary: #a0a0aa;
    --text-muted: #6a6a75;
    --nav-height: 72px;
    --container-max: 1140px;
    --radius: 12px;
    --radius-lg: 20px;
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
}

.container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 24px;
}

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

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

/* --- Navigation --- */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    height: var(--nav-height);
    display: flex;
    align-items: center;
    transition: background 0.3s ease, border-color 0.3s ease, backdrop-filter 0.3s ease;
    border-bottom: 1px solid transparent;
}

.nav-scrolled {
    background: rgba(14, 14, 16, 0.85);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom-color: var(--border);
}

.nav-container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 24px;
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 600;
    font-size: 1.2rem;
    letter-spacing: -0.02em;
}

.nav-logo-img {
    width: 36px;
    height: 36px;
    border-radius: 8px;
}

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

.nav-links {
    display: flex;
    align-items: center;
    gap: 32px;
    list-style: none;
}

.nav-links a {
    font-size: 0.9rem;
    font-weight: 450;
    color: var(--text-secondary);
    transition: color 0.2s ease;
}

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

.nav-cta {
    background: var(--green);
    color: var(--bg-primary) !important;
    padding: 8px 20px;
    border-radius: 8px;
    font-weight: 600 !important;
    transition: background 0.2s ease, transform 0.2s ease !important;
}

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

/* Mobile nav toggle */
.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 4px;
}

.nav-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--text-secondary);
    border-radius: 2px;
    transition: transform 0.3s ease, opacity 0.3s ease;
}

.nav-toggle.active span:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
}

.nav-toggle.active span:nth-child(2) {
    opacity: 0;
}

.nav-toggle.active span:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
}

/* --- Buttons --- */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 12px 28px;
    border-radius: 10px;
    font-weight: 600;
    font-size: 0.95rem;
    transition: all 0.2s ease;
    cursor: pointer;
    border: none;
    font-family: inherit;
}

.btn-primary {
    background: var(--green);
    color: var(--bg-primary);
}

.btn-primary:hover {
    background: var(--green-dim);
    transform: translateY(-2px);
    box-shadow: 0 8px 30px var(--green-glow-strong);
}

.btn-secondary {
    background: transparent;
    color: var(--text-primary);
    border: 1px solid var(--border-light);
}

.btn-secondary:hover {
    border-color: var(--text-secondary);
    background: rgba(255, 255, 255, 0.03);
    transform: translateY(-2px);
}

.btn-large {
    padding: 16px 40px;
    font-size: 1.05rem;
    border-radius: 12px;
}

/* --- Hero Section --- */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: calc(var(--nav-height) + 40px) 24px 80px;
    overflow: hidden;
}

.hero-glow {
    position: absolute;
    top: -200px;
    left: 50%;
    transform: translateX(-50%);
    width: 800px;
    height: 800px;
    background: radial-gradient(circle, var(--green-glow) 0%, transparent 70%);
    pointer-events: none;
    z-index: 0;
}

.hero-content {
    position: relative;
    z-index: 1;
    max-width: 700px;
    margin: 0 auto;
}

.hero-logo {
    width: 100px;
    height: 100px;
    border-radius: 24px;
    margin-bottom: 32px;
    animation: float 6s ease-in-out infinite;
}

@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-10px); }
}

.hero-title {
    font-size: clamp(2.8rem, 6vw, 4.2rem);
    font-weight: 700;
    line-height: 1.1;
    letter-spacing: -0.03em;
    margin-bottom: 20px;
}

.hero-subtitle {
    font-size: clamp(1rem, 2vw, 1.2rem);
    color: var(--text-secondary);
    line-height: 1.7;
    max-width: 560px;
    margin: 0 auto 36px;
}

.hero-actions {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: 40px;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-size: 0.85rem;
    color: var(--text-muted);
    font-family: 'JetBrains Mono', monospace;
}

.badge-dot {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--green);
    animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.4; }
}

/* --- Section Headers --- */
.section-header {
    text-align: center;
    margin-bottom: 64px;
}

.section-title {
    font-size: clamp(2rem, 4vw, 2.8rem);
    font-weight: 700;
    letter-spacing: -0.02em;
    line-height: 1.2;
    margin-bottom: 16px;
}

.section-subtitle {
    font-size: 1.1rem;
    color: var(--text-secondary);
    max-width: 520px;
    margin: 0 auto;
    line-height: 1.7;
}

/* --- Features Section --- */
.features {
    padding: 120px 0;
    position: relative;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.feature-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 36px 32px;
    transition: all 0.3s ease;
    /* Animation setup */
    opacity: 0;
    transform: translateY(30px);
}

.feature-card.animate-in {
    opacity: 1;
    transform: translateY(0);
    transition: opacity 0.6s ease, transform 0.6s ease, border-color 0.3s ease, background 0.3s ease;
}

.feature-card:hover {
    border-color: var(--green-dim);
    background: var(--bg-card-hover);
    transform: translateY(-4px);
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.3);
}

.feature-card.animate-in:hover {
    transform: translateY(-4px);
}

.feature-icon {
    width: 48px;
    height: 48px;
    background: var(--green-glow);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
}

.feature-icon svg {
    width: 24px;
    height: 24px;
    color: var(--green);
}

.feature-card h3 {
    font-size: 1.15rem;
    font-weight: 600;
    margin-bottom: 10px;
    letter-spacing: -0.01em;
}

.feature-card p {
    font-size: 0.92rem;
    color: var(--text-secondary);
    line-height: 1.65;
}

/* Staggered animation delays */
.feature-card:nth-child(1) { transition-delay: 0s; }
.feature-card:nth-child(2) { transition-delay: 0.1s; }
.feature-card:nth-child(3) { transition-delay: 0.2s; }
.feature-card:nth-child(4) { transition-delay: 0.3s; }
.feature-card:nth-child(5) { transition-delay: 0.4s; }
.feature-card:nth-child(6) { transition-delay: 0.5s; }

/* --- Philosophy Section --- */
.philosophy {
    padding: 120px 0;
    background: var(--bg-secondary);
    border-top: 1px solid var(--border);
    border-bottom: 1px solid var(--border);
}

.philosophy-content {
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
    /* Animation setup */
    opacity: 0;
    transform: translateY(30px);
}

.philosophy-content.animate-in {
    opacity: 1;
    transform: translateY(0);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

.philosophy-badge {
    display: inline-block;
    font-size: 0.8rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.12em;
    color: var(--green);
    background: var(--green-glow);
    border: 1px solid rgba(78, 202, 106, 0.2);
    padding: 6px 16px;
    border-radius: 100px;
    margin-bottom: 28px;
}

.philosophy-title {
    font-size: clamp(2rem, 4vw, 2.8rem);
    font-weight: 700;
    letter-spacing: -0.02em;
    line-height: 1.2;
    margin-bottom: 20px;
}

.philosophy-text {
    font-size: 1.1rem;
    color: var(--text-secondary);
    line-height: 1.8;
    max-width: 620px;
    margin: 0 auto 56px;
}

.philosophy-text em {
    color: var(--text-primary);
    font-style: normal;
    font-weight: 500;
}

.philosophy-pillars {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
    text-align: center;
}

.pillar {
    padding: 24px 16px;
}

.pillar-icon {
    width: 44px;
    height: 44px;
    margin: 0 auto 16px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.pillar-icon svg {
    width: 28px;
    height: 28px;
    color: var(--green);
}

.pillar h3 {
    font-size: 1.05rem;
    font-weight: 600;
    margin-bottom: 8px;
    letter-spacing: -0.01em;
}

.pillar p {
    font-size: 0.88rem;
    color: var(--text-secondary);
    line-height: 1.6;
}

/* --- How It Works Section --- */
.how-it-works {
    padding: 120px 0;
}

.steps {
    max-width: 640px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.step {
    display: flex;
    gap: 28px;
    align-items: flex-start;
    width: 100%;
    /* Animation setup */
    opacity: 0;
    transform: translateX(-30px);
}

.step.animate-in {
    opacity: 1;
    transform: translateX(0);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.step-number {
    flex-shrink: 0;
    width: 52px;
    height: 52px;
    border-radius: 14px;
    background: var(--green-glow);
    border: 1px solid rgba(78, 202, 106, 0.2);
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: 'JetBrains Mono', monospace;
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--green);
}

.step-content h3 {
    font-size: 1.2rem;
    font-weight: 600;
    margin-bottom: 8px;
    letter-spacing: -0.01em;
}

.step-content p {
    font-size: 0.95rem;
    color: var(--text-secondary);
    line-height: 1.65;
}

.step-connector {
    width: 2px;
    height: 48px;
    background: linear-gradient(to bottom, var(--border-light), transparent);
    margin: 4px 0 4px 25px;
}

/* --- Providers Section --- */
.providers {
    padding: 100px 0;
    text-align: center;
    border-top: 1px solid var(--border);
}

.providers-content {
    max-width: 800px;
    margin: 0 auto;
    /* Animation setup */
    opacity: 0;
    transform: translateY(30px);
}

.providers-content.animate-in {
    opacity: 1;
    transform: translateY(0);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

.provider-tags {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 12px;
    margin-top: 40px;
}

.provider-tag {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--text-secondary);
    background: var(--bg-card);
    border: 1px solid var(--border);
    padding: 8px 20px;
    border-radius: 100px;
    transition: all 0.2s ease;
}

.provider-tag:hover {
    color: var(--green);
    border-color: var(--green-dim);
    background: var(--green-glow);
    transform: translateY(-2px);
}

/* --- Download Section --- */
.download {
    padding: 120px 0;
}

.download-card {
    position: relative;
    text-align: center;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 28px;
    padding: 80px 40px;
    overflow: hidden;
}

.download-glow {
    position: absolute;
    top: -100px;
    left: 50%;
    transform: translateX(-50%);
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, var(--green-glow) 0%, transparent 70%);
    pointer-events: none;
}

.download-logo {
    position: relative;
    width: 72px;
    height: 72px;
    border-radius: 18px;
    margin-bottom: 28px;
}

.download-card h2 {
    position: relative;
    font-size: clamp(1.8rem, 3vw, 2.4rem);
    font-weight: 700;
    letter-spacing: -0.02em;
    margin-bottom: 12px;
}

.download-card p {
    position: relative;
    font-size: 1.1rem;
    color: var(--text-secondary);
    margin-bottom: 32px;
}

.download-card .btn {
    position: relative;
}

.download-note {
    display: block;
    margin-top: 16px;
    font-size: 0.85rem;
    color: var(--text-muted);
    font-style: italic;
    position: relative;
}

.download-requirements {
    position: relative;
    display: flex;
    justify-content: center;
    gap: 12px;
    margin-top: 28px;
    font-size: 0.8rem;
    color: var(--text-muted);
    font-family: 'JetBrains Mono', monospace;
}

.download-sep {
    color: var(--border-light);
}

/* --- Community Tools Section --- */
.community {
    padding: 100px 0;
    background: var(--bg-secondary);
}

.community-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 24px;
    max-width: 640px;
    margin: 0 auto;
}

.community-card {
    display: block;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 32px 28px;
    transition: all 0.3s ease;
    /* Animation setup */
    opacity: 0;
    transform: translateY(30px);
}

.community-card.animate-in {
    opacity: 1;
    transform: translateY(0);
    transition: opacity 0.6s ease, transform 0.6s ease, border-color 0.3s ease, background 0.3s ease;
}

.community-card:hover {
    border-color: var(--green-dim);
    background: var(--bg-card-hover);
    transform: translateY(-4px);
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.3);
}

.community-card.animate-in:hover {
    transform: translateY(-4px);
}

.community-card-header {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 12px;
}

.community-card-header h3 {
    font-size: 1.15rem;
    font-weight: 600;
    letter-spacing: -0.01em;
}

.community-tag {
    font-size: 0.7rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: var(--green);
    background: var(--green-glow);
    border: 1px solid rgba(78, 202, 106, 0.2);
    padding: 3px 10px;
    border-radius: 100px;
}

.community-card p {
    font-size: 0.92rem;
    color: var(--text-secondary);
    line-height: 1.65;
    margin-bottom: 16px;
}

.community-author {
    font-size: 0.82rem;
    color: var(--text-muted);
    font-style: italic;
}

/* --- Footer --- */
.footer {
    padding: 40px 0;
    border-top: 1px solid var(--border);
}

.footer-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 20px;
}

.footer-brand {
    display: flex;
    align-items: center;
    gap: 10px;
}

.footer-logo {
    width: 28px;
    height: 28px;
    border-radius: 6px;
}

.footer-name {
    font-weight: 600;
    font-size: 0.95rem;
    color: var(--text-secondary);
}

.footer-links {
    display: flex;
    gap: 24px;
}

.footer-links a {
    font-size: 0.85rem;
    color: var(--text-muted);
    transition: color 0.2s ease;
}

.footer-links a:hover {
    color: var(--text-primary);
}

.footer-legal p {
    font-size: 0.8rem;
    color: var(--text-muted);
}

/* --- Responsive --- */
@media (max-width: 900px) {
    .features-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

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

    .nav-links {
        position: fixed;
        top: var(--nav-height);
        left: 0;
        right: 0;
        background: rgba(14, 14, 16, 0.95);
        backdrop-filter: blur(20px);
        -webkit-backdrop-filter: blur(20px);
        flex-direction: column;
        padding: 24px;
        gap: 20px;
        border-bottom: 1px solid var(--border);
        transform: translateY(-100%);
        opacity: 0;
        pointer-events: none;
        transition: transform 0.3s ease, opacity 0.3s ease;
    }

    .nav-links.active {
        transform: translateY(0);
        opacity: 1;
        pointer-events: all;
    }

    .nav-cta {
        width: 100%;
        text-align: center;
    }

    .hero {
        min-height: auto;
        padding: calc(var(--nav-height) + 60px) 24px 80px;
    }

    .hero-logo {
        width: 80px;
        height: 80px;
    }

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

    .features, .philosophy, .how-it-works, .community, .download {
        padding: 80px 0;
    }

    .philosophy-pillars {
        grid-template-columns: 1fr;
        gap: 24px;
    }

    .download-card {
        padding: 60px 24px;
    }

    .download-requirements {
        flex-direction: column;
        gap: 6px;
    }

    .download-sep {
        display: none;
    }

    .footer-content {
        flex-direction: column;
        text-align: center;
    }

    .step {
        gap: 20px;
    }

    .step-connector {
        margin-left: 25px;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 2.2rem;
    }

    .hero-actions {
        flex-direction: column;
        align-items: center;
    }

    .hero-actions .btn {
        width: 100%;
    }
}