/* ============================================
   COMMON.CSS - ЄДИНИЙ СТИЛЬ ДЛЯ ВСІХ СТОРІНОК
   ============================================ */

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

:root {
    --accent: #DC2626;
    --accent-dark: #991B1B;
    --text: #0A0A0A;
    --text-light: #525252;
    --bg: #FFFFFF;
    --bg-subtle: #FAFAFA;
    --border: #E5E5E5;
    --footer-bg: #F5F5F5;
}

html { scroll-behavior: smooth; }
body { 
    font-family: 'DM Sans', sans-serif; 
    line-height: 1.6; 
    color: var(--text); 
    background: var(--bg); 
    -webkit-font-smoothing: antialiased; 
}
.mono { font-family: 'JetBrains Mono', monospace; font-weight: 600; }

/* ============================================
   HEADER (однаковий для всіх)
   ============================================ */
header { 
    background: var(--bg); 
    border-bottom: 2px solid var(--border); 
    padding: 1.25rem 0; 
    position: sticky; 
    top: 0; 
    z-index: 100; 
}
.header-content { 
    max-width: 1280px; 
    margin: 0 auto; 
    padding: 0 2rem; 
    display: flex; 
    justify-content: space-between; 
    align-items: center; 
}
.logo { 
    font-size: 16px; 
    font-weight: 700; 
    color: var(--text); 
    letter-spacing: -0.5px; 
    text-transform: uppercase; 
    text-decoration: none; 
    min-width: 150px; 
    display: block; 
}
.logo-accent { color: var(--accent); }
nav { display: flex; gap: 2rem; align-items: center; }
nav a { 
    color: var(--text-light); 
    text-decoration: none; 
    font-size: 14px; 
    font-weight: 600; 
    text-transform: uppercase; 
    letter-spacing: 0.5px; 
    transition: all 0.2s; 
    position: relative; 
}
nav a::after { 
    content: ''; 
    position: absolute; 
    bottom: -4px; 
    left: 0; 
    width: 0; 
    height: 2px; 
    background: var(--accent); 
    transition: width 0.3s; 
}
nav a:hover { color: var(--text); }
nav a:hover::after { width: 100%; }

/* ============================================
   MAIN CONTENT
   ============================================ */
main { 
    max-width: 1100px; 
    margin: 4rem auto 6rem; 
    padding: 0 2rem; 
}

/* Заголовки */
h1 { 
    font-size: 40px; 
    font-weight: 700; 
    letter-spacing: -1.5px; 
    margin-bottom: 1.5rem; 
    line-height: 1.2; 
    color: var(--text);
}
h2 { 
    font-size: 32px; 
    font-weight: 700; 
    letter-spacing: -1px; 
    margin: 3rem 0 1.5rem; 
	line-height: 1.2;
    color: var(--text);
}
h3 { 
    font-size: 20px; 
    font-weight: 700; 
    margin: 2rem 0 1rem; 
    color: var(--text);
}

/* Параграфи */
p { 
    margin-bottom: 1rem; 
    color: var(--text-light); 
    font-size: 16px; 
}
.subtitle { 
    font-size: 18px; 
    color: var(--text-light); 
    margin-bottom: 3rem; 
}

/* Списки */
ul, ol { 
    margin: 1rem 0 1rem 2rem; 
}
li { 
    margin-bottom: 0.5rem; 
    color: var(--text-light); 
}

/* ============================================
   FOOTER (світло-сірий)
   ============================================ */
footer { 
    padding: 3rem 2rem; 
    background: var(--footer-bg); 
    color: var(--text-light); 
    border-top: 2px solid var(--border); 
}
.footer-content { 
    max-width: 1280px; 
    margin: 0 auto; 
    display: flex; 
    justify-content: space-between; 
    align-items: center; 
}
.footer-links { display: flex; gap: 2rem; }
.footer-links a { 
    color: var(--text-light); 
    text-decoration: none; 
    font-size: 14px; 
    text-transform: uppercase; 
    letter-spacing: 0.5px; 
    transition: color 0.2s; 
}
.footer-links a:hover { color: var(--text); }

/* ============================================
   КНОПКИ
   ============================================ */
.btn { 
    padding: 1rem 2rem; 
    font-size: 14px; 
    font-weight: 600; 
    text-decoration: none; 
    border-radius: 0; 
    transition: all 0.3s; 
    text-transform: uppercase; 
    letter-spacing: 0.5px; 
    border: 2px solid; 
    display: inline-flex; 
    align-items: center; 
    gap: 0.5rem; 
    cursor: pointer; 
    font-family: 'DM Sans', sans-serif; 
}
.btn-primary { 
    background: var(--accent); 
    color: white; 
    border-color: var(--accent); 
}
.btn-primary:hover { 
    background: var(--accent-dark); 
    border-color: var(--accent-dark); 
    transform: translateY(-2px); 
    box-shadow: 0 8px 24px rgba(220, 38, 38, 0.3); 
}
.btn-secondary { 
    background: transparent; 
    color: var(--text); 
    border-color: var(--border); 
}
.btn-secondary:hover { 
    border-color: var(--text); 
    transform: translateY(-2px); 
}
.btn:disabled { 
    opacity: 0.5; 
    cursor: not-allowed; 
    transform: none; 
}

/* ============================================
   ФОРМИ
   ============================================ */
.form-container { 
    background: var(--bg); 
    padding: 3rem; 
    border: 2px solid var(--border); 
    max-width: 700px;
    margin: 0 auto;
}
.label { 
    font-size: 13px; 
    font-weight: 600; 
    text-transform: uppercase; 
    letter-spacing: 0.5px; 
    color: var(--text); 
    margin-bottom: 0.5rem; 
    display: block; 
}
input, textarea, select { 
    width: 100%; 
    padding: 0.75rem 1rem; 
    border: 2px solid var(--border); 
    font-family: 'DM Sans', sans-serif; 
    font-size: 15px; 
    margin-bottom: 1.5rem; 
    transition: border-color 0.2s; 
    background: var(--bg);
}
input:focus, textarea:focus, select:focus { 
    outline: none; 
    border-color: var(--accent); 
}
textarea { 
    min-height: 100px; 
    resize: vertical; 
}
.required { color: var(--accent); }

/* Products Grid (для register) */
.products-label { 
    font-size: 13px; 
    font-weight: 600; 
    text-transform: uppercase; 
    letter-spacing: 0.5px; 
    color: var(--text); 
    margin: 2rem 0 1rem; 
    display: block; 
}
.products-grid { 
    display: grid; 
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr)); 
    gap: 1rem; 
    margin-bottom: 2rem; 
}
.product-checkbox { 
    display: flex; 
    align-items: center; 
    padding: 1rem; 
    border: 2px solid var(--border); 
    cursor: pointer; 
    transition: all 0.2s; 
    background: var(--bg); 
}
.product-checkbox:hover { border-color: var(--accent); }
.product-checkbox input { width: auto; margin: 0 0.75rem 0 0; }
.product-checkbox.checked { 
    background: #FEE2E2; 
    border-color: var(--accent); 
}

/* ============================================
   БЛОКИ КОНТЕНТУ
   ============================================ */
.info-block { 
    background: var(--bg-subtle); 
    padding: 1.5rem; 
    border-left: 4px solid var(--accent); 
    margin-bottom: 2.5rem; 
}
.info-block .mono { 
    color: var(--accent); 
    font-size: 13px; 
    margin-bottom: 0.5rem; 
    display: block; 
}

.alert { 
    background: #FFF3CD; 
    border-left: 4px solid var(--accent); 
    padding: 1rem; 
    margin: 1.5rem 0; 
}

/* Steps (для інструкцій) */
.steps { margin: 2rem 0; }
.step { 
    background: var(--bg-subtle); 
    padding: 1.5rem; 
    border-left: 4px solid var(--accent); 
    margin-bottom: 1.5rem; 
}
.step-num { 
    font-family: 'JetBrains Mono', monospace; 
    font-size: 24px; 
    font-weight: 700; 
    color: var(--accent); 
    margin-bottom: 0.5rem; 
}

/* Tabs */
.tabs { 
    display: flex; 
    gap: 1rem; 
    margin: 2rem 0; 
    border-bottom: 2px solid var(--border); 
    flex-wrap: wrap; 
}
.tab-btn { 
    padding: 1rem 2rem; 
    border: none; 
    background: none; 
    font-size: 14px; 
    font-weight: 600; 
    text-transform: uppercase; 
    letter-spacing: 0.5px; 
    cursor: pointer; 
    border-bottom: 2px solid transparent; 
    margin-bottom: -2px; 
    transition: all 0.3s; 
    color: var(--text-light); 
    font-family: 'JetBrains Mono', monospace; 
}
.tab-btn:hover { color: var(--text); }
.tab-btn.active { 
    color: var(--accent); 
    border-bottom-color: var(--accent); 
}
.tab-content { 
    display: none; 
    padding: 2rem; 
    background: var(--bg-subtle); 
    border: 2px solid var(--border); 
    margin-top: 2rem; 
}
.tab-content.active { display: block; }

/* Code blocks */
code { 
    background: var(--bg-subtle); 
    padding: 0.25rem 0.5rem; 
    border: 1px solid var(--border); 
    font-family: 'JetBrains Mono', monospace; 
    font-size: 14px; 
}
pre { 
    background: var(--bg-subtle); 
    padding: 1.5rem; 
    border: 2px solid var(--border); 
    overflow-x: auto; 
    margin: 1.5rem 0; 
}
pre code { 
    background: none; 
    padding: 0; 
    border: none; 
}

/* ============================================
   ПОВІДОМЛЕННЯ
   ============================================ */
.success-message { 
    background: #D1FAE5; 
    border: 2px solid #10B981; 
    padding: 2rem; 
    text-align: center; 
    display: none; 
    margin-bottom: 2rem; 
}
.success-message.show { display: block; }
.success-message h2 { 
    color: #065F46; 
    margin-bottom: 1rem; 
    font-size: 24px; 
}

.error { 
    color: var(--accent); 
    font-size: 14px; 
    margin-top: -1rem; 
    margin-bottom: 1rem; 
    display: none; 
}
.error.show { display: block; }

.loading { 
    display: none; 
    text-align: center; 
    padding: 1rem; 
    color: var(--text-light); 
    font-family: 'JetBrains Mono', monospace; 
}
.loading.show { display: block; }

/* ============================================
   ДОДАТКОВІ СЕКЦІЇ (для index.html)
   ============================================ */
.hero { 
    padding: 10rem 2rem 6rem; 
    max-width: 1100px; 
    margin: 0 auto; 
}
.hero h1 { 
    font-size: clamp(48px, 8vw, 72px); 
    font-weight: 700; 
    line-height: 1.05; 
    letter-spacing: -2px; 
    margin-bottom: 2rem; 
}
.hero-accent { 
    color: var(--accent); 
    display: block; 
}
.hero p { 
    font-size: 20px; 
    color: var(--text-light); 
    max-width: 680px; 
    margin-bottom: 3rem; 
    line-height: 1.7; 
}
.cta-group { 
    display: flex; 
    gap: 1rem; 
    flex-wrap: wrap; 
}

.features { 
    padding: 6rem 2rem; 
    background: var(--bg-subtle); 
    border-top: 2px solid var(--border); 
    border-bottom: 2px solid var(--border); 
}
.features-container { 
    max-width: 1280px; 
    margin: 0 auto; 
}
.section-label { 
    font-family: 'JetBrains Mono', monospace; 
    font-size: 13px; 
    font-weight: 600; 
    color: var(--accent); 
    text-transform: uppercase; 
    letter-spacing: 1px; 
    margin-bottom: 1rem; 
}
.section-title { 
    font-size: 42px; 
    font-weight: 700; 
    letter-spacing: -1px; 
    margin-bottom: 4rem; 
    max-width: 600px; 
}
.features-grid { 
    display: grid; 
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); 
    gap: 2rem; 
}
.feature-card { 
    background: var(--bg); 
    padding: 2.5rem; 
    border: 2px solid var(--border); 
    transition: all 0.3s; 
}
.feature-card:hover { 
    border-color: var(--accent); 
    transform: translateY(-4px); 
    box-shadow: 0 12px 32px rgba(0, 0, 0, 0.08); 
}
.feature-icon { 
    width: 48px; 
    height: 48px; 
    background: var(--accent); 
    display: flex; 
    align-items: center; 
    justify-content: center; 
    margin-bottom: 1.5rem; 
    color: white; 
    font-size: 24px; 
    font-weight: 700; 
}
.feature-card h3 { 
    font-size: 20px; 
    font-weight: 700; 
    margin-bottom: 0.75rem; 
    letter-spacing: -0.5px; 
}
.feature-card p { 
    color: var(--text-light); 
    font-size: 15px; 
    line-height: 1.6; 
}

.flow { 
    padding: 8rem 2rem; 
    background: var(--bg); 
}
.flow-container { 
    max-width: 1100px; 
    margin: 0 auto; 
}
.flow-diagram { 
    margin-top: 4rem; 
    padding: 4rem; 
    background: var(--bg-subtle); 
    border: 2px solid var(--border); 
}
.flow-steps { 
    display: grid; 
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); 
    gap: 3rem; 
    position: relative; 
}
.flow-step { 
    text-align: center; 
    position: relative; 
}
.flow-step-number { 
    width: 56px; 
    height: 56px; 
    background: linear-gradient(135deg, var(--accent) 0%, var(--accent-dark) 100%); 
    color: white; 
    border-radius: 50%; 
    display: flex; 
    align-items: center; 
    justify-content: center; 
    font-family: 'JetBrains Mono', monospace; 
    font-size: 24px; 
    font-weight: 700; 
    margin: 0 auto 1.5rem; 
    box-shadow: 0 8px 24px rgba(220, 38, 38, 0.25); 
}
.flow-step-title { 
    font-family: 'JetBrains Mono', monospace; 
    font-size: 14px; 
    font-weight: 600; 
    text-transform: uppercase; 
    letter-spacing: 0.5px; 
    margin-bottom: 0.75rem; 
}
.flow-step-desc { 
    color: var(--text-light); 
    font-size: 14px; 
    line-height: 1.6; 
}
.flow-step:not(:last-child)::after { 
    content: '→'; 
    position: absolute; 
    right: -1.5rem; 
    top: 28px; 
    font-size: 32px; 
    color: var(--accent); 
    font-weight: 700; 
}

.preview { 
    padding: 6rem 2rem; 
    background: var(--bg-subtle); 
    color: var(--text);
}
.preview-container { 
    max-width: 1100px; 
    margin: 0 auto; 
}
.preview h2 { 
    font-size: 42px; 
    font-weight: 700; 
    letter-spacing: -1px; 
    margin-bottom: 1rem; 
}
.preview-subtitle { 
    color: var(--text-light); 
    font-size: 18px; 
    margin-bottom: 3rem; 
}
.widget-preview { 
    background: white; 
    padding: 0rem; 
    border: 2px solid var(--accent); 
    margin-top: 3rem; 
}
.widget-preview iframe { 
    width: 100%; 
    border: none; 
    min-height: 500px; 
}

/* ============================================
   АДАПТИВНІСТЬ
   ============================================ */
@media (max-width: 768px) {
    nav { display: none; }
    .footer-content { 
        flex-direction: column; 
        gap: 1rem; 
        text-align: center; 
    }
    .footer-links { 
        flex-direction: column; 
        gap: 0.5rem; 
    }
    .form-container { padding: 2rem 1.5rem; }
    h1 { font-size: 36px; }
    main { padding: 0 1.5rem; }
    .hero { padding: 6rem 1.5rem 4rem; }
    .section-title { font-size: 32px; }
    .flow-steps { grid-template-columns: 1fr; }
    .flow-step:not(:last-child)::after { 
        content: '↓'; 
        right: auto; 
        top: auto; 
        bottom: -2.5rem; 
        left: 50%; 
        transform: translateX(-50%); 
    }
    .cta-group { flex-direction: column; }
    .btn { width: 100%; justify-content: center; }
    .products-grid { grid-template-columns: 1fr; }
}