/* ==========================================================================
   SigOps shared stylesheet
   Base design system used across every page (index, about, receptionist,
   integration, custom, website-development, business-automation).
   Page-specific layout (hero sections, tier grids, etc.) stays inline in
   each page's own <style> block; this file holds what's identical
   everywhere so it isn't duplicated eight times over.
   ========================================================================== */

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

:root {
    --black: #000000;
    --white: #ffffff;
    --gray-100: #f5f5f5;
    --gray-200: #e5e5e5;
    --gray-300: #d4d4d4;
    --gray-400: #a3a3a3;
    --gray-500: #737373;
    --gray-600: #525252;
    --gray-700: #404040;
    --gray-800: #262626;
    --gray-900: #171717;
}

html { scroll-behavior: smooth; }

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background: var(--black);
    color: var(--white);
    line-height: 1.6;
    overflow-x: hidden;
}

::selection { background: var(--white); color: var(--black); }
a { color: inherit; text-decoration: none; }

/* Header / Nav */
header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
}

nav {
    max-width: 1400px;
    margin: 0 auto;
    height: 80px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 3rem;
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
}

.logo img {
    height: 40px;
    width: auto;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 2.5rem;
}

.nav-links a {
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.15em;
    color: var(--gray-400);
    transition: color 0.3s ease;
    font-weight: 500;
}

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

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    padding: 14px 28px;
    border-radius: 0;
    font-size: 0.8rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    border: none;
    cursor: pointer;
    transition: all 0.3s ease;
}

.btn svg { width: 16px; height: 16px; }

.btn-primary {
    background: var(--white);
    color: var(--black);
}

.btn-primary:hover {
    background: var(--gray-200);
}

.btn-outline {
    background: transparent;
    color: var(--white);
    border: 1px solid var(--white);
}

.btn-outline:hover {
    background: var(--white);
    color: var(--black);
}

.btn-lg { padding: 18px 36px; font-size: 0.85rem; }
.btn-sm { padding: 10px 20px; font-size: 0.75rem; }

/* Shared inner-page template (about / receptionist / integration / custom /
   website-development / business-automation) */
.page-content {
    padding: 140px 3rem 100px;
    max-width: 1200px;
    margin: 0 auto;
}

.back-link {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-size: 0.85rem;
    color: var(--gray-400);
    margin-bottom: 3rem;
    transition: color 0.3s ease;
}

.back-link:hover { color: var(--white); }

.back-link svg {
    width: 16px;
    height: 16px;
}

.page-header {
    margin-bottom: 4rem;
}

.page-header h1 {
    font-size: 3.5rem;
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: 1.5rem;
    text-transform: uppercase;
}

.page-header .subtitle {
    font-size: 1.25rem;
    color: var(--gray-400);
    max-width: 600px;
}

/* Tier pattern (receptionist.html) */
.tier-section { margin-bottom: 5rem; }

.tier-badge {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    background: var(--gray-900);
    border: 1px solid var(--gray-800);
    padding: 10px 20px;
    margin-bottom: 1.5rem;
    font-size: 0.85rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

.tier-badge.core { border-color: var(--gray-600); }
.tier-badge.advanced { border-color: var(--white); }
.tier-badge.enterprise { border-color: var(--white); background: var(--white); color: var(--black); }

.coming-soon-banner {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    background: var(--gray-900);
    border: 1px solid var(--gray-600);
    padding: 10px 20px;
    margin-bottom: 2rem;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.15em;
    color: var(--gray-300);
}

.tier-title {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 1rem;
}

.tier-description {
    font-size: 1.1rem;
    color: var(--gray-300);
    margin-bottom: 2rem;
    max-width: 700px;
}

/* Content-section pattern (custom.html / integration.html / website-development.html / business-automation.html) */
.content-section { margin-bottom: 4rem; }

/* How It Works — numbered step list used across service pages */
.how-it-works { margin-bottom: 4rem; }

.how-it-works .subsection-label {
    font-size: 0.7rem;
    text-transform: uppercase;
    letter-spacing: 0.2em;
    color: var(--gray-500);
    font-weight: 600;
    margin-bottom: 1rem;
}

.how-it-works .subsection-title {
    font-size: 1.6rem;
    font-weight: 700;
    margin-bottom: 2rem;
}

.steps-list {
    display: flex;
    flex-direction: column;
    gap: 0;
    border: 1px solid var(--gray-800);
}

.step-item {
    display: flex;
    gap: 1.5rem;
    padding: 2rem;
    border-bottom: 1px solid var(--gray-800);
}

.step-item:last-child { border-bottom: none; }

.step-number {
    flex-shrink: 0;
    width: 40px;
    height: 40px;
    border: 1px solid var(--gray-600);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 0.95rem;
    color: var(--white);
}

.step-body h4 {
    font-size: 1.05rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    text-transform: uppercase;
    letter-spacing: 0.02em;
}

.step-body p {
    color: var(--gray-400);
    font-size: 0.95rem;
    line-height: 1.7;
}

/* In Practice — real-world example box */
.example-box {
    border: 1px solid var(--gray-700);
    background: var(--gray-900);
    padding: 2.5rem;
    margin-bottom: 4rem;
}

.example-box .subsection-label {
    font-size: 0.7rem;
    text-transform: uppercase;
    letter-spacing: 0.2em;
    color: var(--gray-500);
    font-weight: 600;
    margin-bottom: 1rem;
}

.example-box p {
    color: var(--gray-300);
    font-size: 1.02rem;
    line-height: 1.8;
}

.example-box p strong { color: var(--white); }

@media (max-width: 768px) {
    .step-item { padding: 1.5rem; gap: 1rem; }
    .step-number { width: 32px; height: 32px; font-size: 0.85rem; }
}

.section-badge {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    background: var(--gray-900);
    border: 1px solid var(--white);
    padding: 10px 20px;
    margin-bottom: 1.5rem;
    font-size: 0.85rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

.section-description {
    font-size: 1.1rem;
    color: var(--gray-300);
    margin-bottom: 2.5rem;
    max-width: 800px;
    line-height: 1.8;
}

/* Feature lists, shared across every tier/content section */
.feature-list {
    list-style: none;
    margin-bottom: 2rem;
}

.feature-list li {
    position: relative;
    padding-left: 2rem;
    margin-bottom: 1rem;
    color: var(--gray-300);
    font-size: 1rem;
}

.feature-list li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 10px;
    width: 8px;
    height: 8px;
    background: var(--white);
}

.feature-list li strong { color: var(--white); }

.sub-list {
    list-style: none;
    margin-top: 0.75rem;
    margin-left: 1rem;
}

.sub-list li {
    padding-left: 1.5rem;
    margin-bottom: 0.5rem;
    font-size: 0.95rem;
}

.sub-list li::before {
    width: 6px;
    height: 6px;
    background: var(--gray-500);
    top: 8px;
}

.result-box {
    background: var(--gray-900);
    border-left: 4px solid var(--white);
    padding: 1.5rem 2rem;
    margin-top: 2rem;
}

.result-box strong {
    color: var(--white);
    font-weight: 600;
}

.result-box p {
    color: var(--gray-300);
    margin: 0;
}

.divider {
    height: 1px;
    background: var(--gray-800);
    margin: 4rem 0;
}

.cta-section {
    text-align: center;
    padding: 4rem 0;
}

.cta-section h2 {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 1rem;
}

.cta-section p {
    color: var(--gray-400);
    margin-bottom: 2rem;
}

@media (max-width: 768px) {
    nav { padding: 0 1.5rem; }
    .nav-links { display: none; }
    .page-content { padding: 120px 1.5rem 60px; }
    .page-header h1 { font-size: 2.5rem; }
    .tier-title { font-size: 1.5rem; }
}