/* ============================================
   Two Birds Innovation — Company Site
   Deep space design with teal accents
   ============================================ */

:root {
    --space-900: #0c0a1d;
    --space-800: #13102e;
    --space-700: #1a1640;
    --space-600: #252050;
    --teal-500: #14b8a6;
    --teal-400: #2dd4bf;
    --teal-300: #5eead4;
    --teal-200: #99f6e4;
    --teal-100: #ccfbf1;
    --white: #ffffff;
    --grey-300: #d1d5db;
    --grey-400: #9ca3af;
    --grey-500: #6b7280;
    --radius: 12px;
    --shadow: 0 2px 8px rgba(0,0,0,0.3);
    --shadow-lg: 0 10px 30px rgba(0,0,0,0.4);
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    color: var(--grey-300);
    background: var(--space-900);
    line-height: 1.7;
    font-size: 17px;
}

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

/* Header */
.site-header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(12, 10, 29, 0.92);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid rgba(255,255,255,0.06);
    padding: 16px 0;
}

.site-header .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo {
    font-size: 1.15rem;
    font-weight: 700;
    color: var(--teal-400);
    text-decoration: none;
}

.main-nav {
    display: flex;
    gap: 28px;
}

.main-nav a {
    color: var(--grey-400);
    text-decoration: none;
    font-size: 0.95rem;
    font-weight: 500;
    transition: color 0.2s;
}

.main-nav a:hover {
    color: var(--teal-400);
}

.nav-toggle {
    display: none;
    background: none;
    border: none;
    font-size: 1.5rem;
    color: var(--white);
    cursor: pointer;
}

/* Hero */
.hero {
    padding: 100px 0 80px;
    text-align: center;
    background: radial-gradient(ellipse at top, var(--space-700), var(--space-900));
}

.hero h1 {
    font-size: 3.2rem;
    font-weight: 800;
    color: var(--white);
    line-height: 1.1;
    margin-bottom: 20px;
    letter-spacing: -0.02em;
}

.hero-subtitle {
    font-size: 1.2rem;
    color: var(--grey-400);
    max-width: 640px;
    margin: 0 auto 36px;
    line-height: 1.6;
}

.hero-cta {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 14px 28px;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 600;
    text-decoration: none;
    transition: all 0.2s;
    cursor: pointer;
    border: none;
}

.btn-primary {
    background: var(--teal-500);
    color: var(--space-900);
}

.btn-primary:hover {
    background: var(--teal-400);
    transform: translateY(-1px);
    box-shadow: 0 4px 20px rgba(20, 184, 166, 0.3);
}

.btn-secondary {
    background: transparent;
    color: var(--teal-400);
    border: 2px solid var(--teal-500);
}

.btn-secondary:hover {
    background: rgba(20, 184, 166, 0.1);
}

.btn-large {
    padding: 18px 40px;
    font-size: 1.1rem;
}

/* Sections */
.section {
    padding: 80px 0;
}

.section h2 {
    font-size: 2rem;
    font-weight: 700;
    color: var(--white);
    margin-bottom: 16px;
    text-align: center;
}

/* Results Counters */
.results {
    background: var(--space-800);
}

.counters-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
    margin-top: 48px;
}

.counter-card {
    text-align: center;
    padding: 32px 16px;
    background: var(--space-700);
    border-radius: var(--radius);
    border: 1px solid rgba(255,255,255,0.06);
}

.counter-number {
    font-size: 3rem;
    font-weight: 800;
    color: var(--teal-400);
    display: block;
    line-height: 1.1;
}

.counter-suffix {
    font-size: 2rem;
    font-weight: 800;
    color: var(--teal-400);
}

.counter-label {
    display: block;
    margin-top: 8px;
    font-size: 0.9rem;
    color: var(--grey-400);
    line-height: 1.4;
}

.counter-card.animated .counter-number {
    transition: none;
}

/* Services / Pricing */
.services {
    background: var(--space-900);
}

.pricing-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 32px;
    max-width: 800px;
    margin: 40px auto 0;
}

.pricing-card {
    background: var(--space-700);
    border-radius: var(--radius);
    padding: 40px 32px;
    text-align: center;
    position: relative;
    border: 1px solid rgba(255,255,255,0.06);
}

.pricing-card.featured {
    border: 2px solid var(--teal-500);
}

.featured-badge {
    position: absolute;
    top: -14px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--teal-500);
    color: var(--space-900);
    padding: 4px 16px;
    border-radius: 100px;
    font-size: 0.8rem;
    font-weight: 700;
}

.pricing-card h3 {
    font-size: 1.1rem;
    color: var(--grey-400);
    margin-bottom: 8px;
}

.price {
    font-size: 2.8rem;
    font-weight: 800;
    color: var(--white);
    line-height: 1.1;
}

.price-term {
    display: block;
    font-size: 0.9rem;
    color: var(--grey-500);
    margin-bottom: 24px;
}

.pricing-card ul {
    list-style: none;
    text-align: left;
    margin-bottom: 28px;
}

.pricing-card li {
    padding: 8px 0;
    border-bottom: 1px solid rgba(255,255,255,0.06);
    font-size: 0.95rem;
}

.pricing-card li:last-child {
    border-bottom: none;
}

.pricing-card li::before {
    content: '✓ ';
    color: var(--teal-500);
    font-weight: 700;
}

/* Free Tools */
.free-tools {
    background: var(--space-800);
}

.tools-card {
    max-width: 700px;
    margin: 0 auto;
    text-align: center;
    background: linear-gradient(135deg, var(--space-700), var(--space-600));
    border-radius: var(--radius);
    padding: 48px 40px;
    border: 1px solid var(--teal-500);
    box-shadow: 0 0 40px rgba(20, 184, 166, 0.1);
}

.tools-card h2 {
    margin-bottom: 16px;
}

.tools-card p {
    color: var(--grey-300);
    font-size: 1.05rem;
    margin-bottom: 24px;
    line-height: 1.7;
}

.tools-note {
    font-size: 0.85rem;
    color: var(--grey-500);
    margin-top: 12px;
    margin-bottom: 0;
}

/* FAQ */
.faq {
    background: var(--space-900);
}

.faq-list {
    max-width: 700px;
    margin: 40px auto 0;
}

.faq-item {
    border-bottom: 1px solid rgba(255,255,255,0.06);
    padding: 0;
}

.faq-item summary {
    padding: 20px 0;
    font-size: 1.05rem;
    font-weight: 600;
    color: var(--white);
    cursor: pointer;
    list-style: none;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.faq-item summary::-webkit-details-marker {
    display: none;
}

.faq-item summary::after {
    content: '+';
    font-size: 1.4rem;
    color: var(--teal-500);
    font-weight: 300;
    flex-shrink: 0;
    margin-left: 16px;
}

.faq-item[open] summary::after {
    content: '−';
}

.faq-item p {
    padding: 0 0 20px;
    color: var(--grey-400);
    line-height: 1.7;
}

/* Contact */
.contact {
    background: linear-gradient(135deg, var(--space-700), var(--space-800));
    text-align: center;
}

.contact p {
    color: var(--grey-400);
    font-size: 1.1rem;
    margin-bottom: 24px;
}

.contact-btn {
    margin-bottom: 16px;
}

.contact-note {
    font-size: 0.9rem;
    color: var(--grey-500);
}

.contact-note a {
    color: var(--teal-400);
    text-decoration: none;
}

.contact-note a:hover {
    text-decoration: underline;
}

/* Footer */
.site-footer {
    padding: 24px 0;
    text-align: center;
    border-top: 1px solid rgba(255,255,255,0.06);
    color: var(--grey-500);
    font-size: 0.9rem;
}

/* ============================================
   Mobile Responsive
   ============================================ */

@media (max-width: 768px) {
    .main-nav {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: var(--space-800);
        flex-direction: column;
        padding: 16px 24px;
        border-bottom: 1px solid rgba(255,255,255,0.06);
    }

    .main-nav.active {
        display: flex;
    }

    .nav-toggle {
        display: block;
    }

    .hero h1 {
        font-size: 2.2rem;
    }

    .counters-grid {
        grid-template-columns: repeat(2, 1fr);
    }

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

    .section {
        padding: 60px 0;
    }

    .tools-card {
        padding: 32px 24px;
    }
}

@media (max-width: 420px) {
    body {
        font-size: 16px;
    }

    .hero {
        padding: 60px 0 48px;
    }

    .hero h1 {
        font-size: 1.8rem;
    }

    .hero-subtitle {
        font-size: 1rem;
    }

    .hero-cta {
        flex-direction: column;
        align-items: stretch;
    }

    .hero-cta .btn {
        text-align: center;
    }

    .counters-grid {
        grid-template-columns: 1fr 1fr;
        gap: 16px;
    }

    .counter-number {
        font-size: 2.2rem;
    }

    .section h2 {
        font-size: 1.6rem;
    }

    .price {
        font-size: 2.2rem;
    }

    .pricing-card {
        padding: 28px 20px;
    }

    .tools-card {
        padding: 28px 18px;
    }

    .container {
        padding: 0 16px;
    }

    .btn-large {
        padding: 16px 28px;
        font-size: 1rem;
    }
}

@media (min-width: 1440px) {
    .container {
        max-width: 1200px;
    }

    .hero h1 {
        font-size: 3.8rem;
    }
}