/* ========================================
   AI Automation Services - Styles
   Clean, modern design for A2P verification
   ======================================== */

/* CSS Custom Properties */
:root {
    --color-primary: #1e40af;
    --color-primary-dark: #1e3a8a;
    --color-primary-light: #3b82f6;
    --color-secondary: #0f172a;
    --color-accent: #059669;
    --color-text: #1f2937;
    --color-text-light: #6b7280;
    --color-bg: #ffffff;
    --color-bg-alt: #f8fafc;
    --color-border: #e5e7eb;
    --color-white: #ffffff;
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
    --radius: 12px;
    --radius-sm: 8px;
    --transition: 0.2s ease;
    --nav-height: 64px;
}

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

html {
    font-size: 16px;
    scroll-behavior: smooth;
    scroll-padding-top: calc(var(--nav-height) + 1rem);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    line-height: 1.6;
    color: var(--color-text);
    background-color: var(--color-bg);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Container */
.container {
    max-width: 900px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

/* ========================================
   Navigation
   ======================================== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--nav-height);
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--color-border);
    z-index: 1000;
    transition: box-shadow var(--transition);
}

.navbar.scrolled {
    box-shadow: var(--shadow-md);
}

.nav-container {
    max-width: 900px;
    margin: 0 auto;
    padding: 0 1.5rem;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-brand {
    font-size: 1.125rem;
    font-weight: 700;
    color: var(--color-primary);
    text-decoration: none;
    letter-spacing: -0.02em;
}

.nav-brand:hover {
    color: var(--color-primary-dark);
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 0.5rem;
}

.nav-links a {
    display: block;
    padding: 0.5rem 1rem;
    color: var(--color-text);
    text-decoration: none;
    font-size: 0.9375rem;
    font-weight: 500;
    border-radius: var(--radius-sm);
    transition: all var(--transition);
}

.nav-links a:hover {
    color: var(--color-primary);
    background: var(--color-bg-alt);
}

/* Mobile Nav Toggle */
.nav-toggle {
    display: none;
    flex-direction: column;
    justify-content: center;
    gap: 5px;
    width: 32px;
    height: 32px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 4px;
}

.nav-toggle span {
    display: block;
    width: 100%;
    height: 2px;
    background: var(--color-text);
    border-radius: 2px;
    transition: all var(--transition);
}

.nav-toggle[aria-expanded="true"] span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

.nav-toggle[aria-expanded="true"] span:nth-child(2) {
    opacity: 0;
}

.nav-toggle[aria-expanded="true"] span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
}

/* ========================================
   Hero Section
   ======================================== */
.hero {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
    color: var(--color-white);
    padding: 8rem 0 5rem;
    margin-top: var(--nav-height);
    text-align: center;
}

.hero h1 {
    font-size: clamp(2rem, 5vw, 3rem);
    font-weight: 800;
    margin-bottom: 1rem;
    letter-spacing: -0.03em;
    line-height: 1.1;
}

.tagline {
    font-size: clamp(1.125rem, 2.5vw, 1.375rem);
    opacity: 0.9;
    font-weight: 400;
    margin-bottom: 2rem;
    max-width: 500px;
    margin-left: auto;
    margin-right: auto;
}

/* Hero Small - for subpages */
.hero-small {
    padding: 5rem 0 3rem;
}

.hero-small h1 {
    font-size: clamp(1.75rem, 4vw, 2.5rem);
}

.hero-small .tagline {
    margin-bottom: 0;
}

/* Button */
.btn {
    display: inline-block;
    padding: 0.875rem 2rem;
    font-size: 1rem;
    font-weight: 600;
    text-decoration: none;
    border-radius: var(--radius-sm);
    transition: all var(--transition);
    cursor: pointer;
    border: none;
}

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

.btn-primary:hover {
    background: var(--color-bg-alt);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

/* ========================================
   Sections
   ======================================== */
.section {
    padding: 4rem 0;
}

.section-alt {
    background: var(--color-bg-alt);
}

/* Card */
.card {
    background: var(--color-white);
    border-radius: var(--radius);
    padding: 2.5rem;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--color-border);
}

.section-alt .card {
    box-shadow: var(--shadow-md);
}

/* Card CTA - centered call to action */
.card-cta {
    text-align: center;
}

.card-cta p {
    margin-bottom: 1.5rem;
}

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

.card-cta .btn-primary:hover {
    background: var(--color-primary-dark);
}

h2 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-secondary);
    margin-bottom: 1.5rem;
    letter-spacing: -0.02em;
}

.section-intro {
    color: var(--color-text-light);
    margin-bottom: 1.25rem;
}

/* ========================================
   Service List
   ======================================== */
.service-list {
    list-style: none;
}

.service-list li {
    padding: 1rem 0;
    padding-left: 2rem;
    position: relative;
    border-bottom: 1px solid var(--color-border);
    font-size: 1.0625rem;
}

.service-list li:last-child {
    border-bottom: none;
    padding-bottom: 0;
}

.service-list li:first-child {
    padding-top: 0;
}

.service-list li::before {
    content: "";
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 8px;
    height: 8px;
    background: var(--color-primary-light);
    border-radius: 50%;
}

.service-list li:first-child::before {
    top: 0.75rem;
    transform: none;
}

.service-list li:last-child::before {
    top: 1rem;
    transform: none;
}

/* ========================================
   Compliance List
   ======================================== */
.compliance-list {
    list-style: none;
    margin-bottom: 1.5rem;
}

.compliance-list li {
    padding: 0.75rem 0;
    padding-left: 2rem;
    position: relative;
    color: var(--color-text);
}

.compliance-list li::before {
    content: "✓";
    position: absolute;
    left: 0;
    top: 0.75rem;
    color: var(--color-accent);
    font-weight: 700;
    font-size: 1rem;
}

/* Opt-Out Box */
.opt-out-box {
    background: linear-gradient(135deg, #f0f9ff 0%, #e0f2fe 100%);
    border: 1px solid #bae6fd;
    border-left: 4px solid var(--color-primary);
    border-radius: var(--radius-sm);
    padding: 1.5rem;
    margin-top: 1rem;
}

.opt-out-box h3 {
    font-size: 1rem;
    font-weight: 700;
    color: var(--color-primary-dark);
    margin-bottom: 0.75rem;
}

.opt-out-box p {
    margin-bottom: 0.5rem;
    color: var(--color-text);
}

.opt-out-box p:last-child {
    margin-bottom: 0;
}

.opt-out-box strong {
    color: var(--color-primary-dark);
    font-weight: 700;
}

/* ========================================
   Contact Section
   ======================================== */
.contact-grid {
    display: grid;
    gap: 1.5rem;
}

.contact-item {
    display: flex;
    align-items: flex-start;
    gap: 1rem;
}

.contact-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 48px;
    height: 48px;
    background: var(--color-bg-alt);
    border-radius: var(--radius-sm);
    color: var(--color-primary);
    flex-shrink: 0;
}

.contact-item strong {
    display: block;
    font-size: 0.875rem;
    color: var(--color-text-light);
    font-weight: 500;
    margin-bottom: 0.25rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.contact-item a {
    color: var(--color-primary);
    text-decoration: none;
    font-weight: 500;
    transition: color var(--transition);
}

.contact-item a:hover {
    color: var(--color-primary-dark);
    text-decoration: underline;
}

.contact-item span {
    color: var(--color-text);
    font-weight: 500;
}

/* ========================================
   Forms
   ======================================== */
.opt-in-form {
    margin-top: 1.5rem;
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    font-weight: 600;
    color: var(--color-secondary);
    margin-bottom: 0.5rem;
    font-size: 0.9375rem;
}

.form-group input[type="tel"],
.form-group input[type="text"],
.form-group input[type="email"] {
    width: 100%;
    max-width: 400px;
    padding: 0.875rem 1rem;
    font-size: 1rem;
    border: 2px solid var(--color-border);
    border-radius: var(--radius-sm);
    transition: border-color var(--transition), box-shadow var(--transition);
    font-family: inherit;
}

.form-group input:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(30, 64, 175, 0.1);
}

.form-group small {
    display: block;
    margin-top: 0.5rem;
    color: var(--color-text-light);
    font-size: 0.8125rem;
}

.consent-checkbox {
    display: flex;
    align-items: flex-start;
    gap: 0.75rem;
    margin-bottom: 1.5rem;
    padding: 1rem;
    background: #fffbeb;
    border: 2px solid #fcd34d;
    border-radius: var(--radius-sm);
}

.consent-checkbox input[type="checkbox"] {
    width: 24px;
    height: 24px;
    margin-top: 2px;
    flex-shrink: 0;
    cursor: pointer;
    accent-color: var(--color-primary);
}

.consent-checkbox label {
    font-size: 1rem;
    font-weight: 600;
    color: var(--color-secondary);
    cursor: pointer;
    line-height: 1.5;
}

.required {
    color: #dc2626;
}

.disclosure-box {
    background: var(--color-bg-alt);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    padding: 1.25rem;
    margin-bottom: 1.5rem;
}

.disclosure-box p {
    font-size: 0.875rem;
    color: var(--color-text);
    line-height: 1.7;
    margin: 0;
}

.disclosure-box p + p {
    margin-top: 0.5rem;
}

.btn-submit {
    background: var(--color-primary);
    color: var(--color-white);
    padding: 1rem 2rem;
    font-size: 1rem;
    font-weight: 600;
    border: none;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all var(--transition);
}

.btn-submit:hover {
    background: var(--color-primary-dark);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.btn-submit:active {
    transform: translateY(0);
}

.form-message {
    margin-top: 1.5rem;
    padding: 1rem 1.25rem;
    border-radius: var(--radius-sm);
}

.form-success {
    background: #ecfdf5;
    border: 1px solid #a7f3d0;
    color: #065f46;
}

.form-error {
    background: #fef2f2;
    border: 1px solid #fecaca;
    color: #991b1b;
}

.form-message p {
    margin: 0;
    font-weight: 500;
}

/* ========================================
   Footer
   ======================================== */
.footer {
    background: var(--color-secondary);
    color: var(--color-white);
    padding: 2rem 0;
    text-align: center;
}

.footer-links {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 1.5rem;
    margin-bottom: 1rem;
}

.footer-links a {
    color: var(--color-white);
    text-decoration: none;
    font-size: 0.875rem;
    opacity: 0.8;
    transition: opacity var(--transition);
}

.footer-links a:hover {
    opacity: 1;
    text-decoration: underline;
}

.footer p {
    font-size: 0.875rem;
    opacity: 0.8;
}

/* ========================================
   Responsive Design
   ======================================== */
@media (max-width: 768px) {
    .nav-toggle {
        display: flex;
    }

    .nav-links {
        position: absolute;
        top: var(--nav-height);
        left: 0;
        right: 0;
        flex-direction: column;
        background: var(--color-white);
        border-bottom: 1px solid var(--color-border);
        padding: 1rem;
        gap: 0;
        display: none;
        box-shadow: var(--shadow-md);
    }

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

    .nav-links a {
        padding: 0.875rem 1rem;
    }

    .hero {
        padding: 6rem 0 4rem;
    }

    .section {
        padding: 3rem 0;
    }

    .card {
        padding: 1.75rem;
    }

    .contact-grid {
        gap: 1.25rem;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 1rem;
    }

    .hero {
        padding: 5rem 0 3rem;
    }

    .card {
        padding: 1.5rem;
    }

    .service-list li,
    .compliance-list li {
        padding-left: 1.5rem;
    }

    .opt-out-box {
        padding: 1.25rem;
    }
}

/* ========================================
   Accessibility
   ======================================== */
@media (prefers-reduced-motion: reduce) {
    html {
        scroll-behavior: auto;
    }

    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

a:focus,
button:focus {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
}

a:focus:not(:focus-visible),
button:focus:not(:focus-visible) {
    outline: none;
}

a:focus-visible,
button:focus-visible {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
}

/* Skip Link */
.skip-link {
    position: absolute;
    top: -40px;
    left: 0;
    background: var(--color-primary);
    color: var(--color-white);
    padding: 8px 16px;
    z-index: 9999;
    transition: top var(--transition);
}

.skip-link:focus {
    top: 0;
}

/* ========================================
   Print Styles
   ======================================== */
@media print {
    .navbar {
        position: static;
        box-shadow: none;
    }

    .hero {
        margin-top: 0;
        background: var(--color-primary) !important;
        -webkit-print-color-adjust: exact;
        print-color-adjust: exact;
    }

    .btn {
        display: none;
    }

    .card {
        box-shadow: none;
        border: 1px solid #ccc;
    }

    body {
        font-size: 12pt;
    }

    .section {
        page-break-inside: avoid;
    }
}