/* ============================================
   ClimaInsight - Pro Signup Page
   ============================================ */

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

:root {
    --navy-900: #060d1b;
    --navy-800: #0a1628;
    --navy-700: #0f1d32;
    --navy-600: #142640;
    --navy-500: #1e3a5f;
    --slate-400: #94a3b8;
    --slate-300: #cbd5e1;
    --slate-200: #e2e8f0;
    --slate-100: #f1f5f9;
    --slate-50: #f8fafc;
    --white: #ffffff;
    --teal-500: #14b8a6;
    --teal-400: #2dd4bf;
    --teal-600: #0d9488;
    --blue-500: #0ea5e9;
    --amber-500: #f59e0b;
    --red-500: #ef4444;
    --green-500: #22c55e;
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-mono: 'IBM Plex Mono', 'Fira Code', monospace;
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -2px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -4px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 8px 10px -6px rgba(0, 0, 0, 0.1);
    --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

html {
    font-size: 16px;
}

body {
    font-family: var(--font-sans);
    color: var(--navy-800);
    line-height: 1.6;
    background: var(--slate-50);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

a {
    text-decoration: none;
    color: inherit;
    transition: color var(--transition);
}

ul {
    list-style: none;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

/* --- Navbar --- */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: 12px 0;
    background: rgba(6, 13, 27, 0.95);
    backdrop-filter: blur(12px);
    box-shadow: 0 1px 0 rgba(255, 255, 255, 0.05);
}

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

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    color: var(--white);
    font-weight: 700;
    font-size: 1.25rem;
}

.logo-icon {
    color: var(--teal-400);
    display: flex;
}

.back-link {
    color: var(--slate-300);
    font-size: 0.875rem;
    font-weight: 500;
    transition: color var(--transition);
}

.back-link:hover {
    color: var(--teal-400);
}

/* --- Buttons --- */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 10px 24px;
    border-radius: 8px;
    font-family: var(--font-sans);
    font-size: 0.875rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition);
    border: none;
    text-align: center;
}

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

.btn-primary:hover {
    background: var(--teal-600);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(20, 184, 166, 0.3);
}

.btn-primary:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
}

.btn-lg {
    padding: 14px 32px;
    font-size: 1rem;
}

.btn-block {
    width: 100%;
}

/* --- Signup Page Layout --- */
.signup-page {
    padding-top: 80px;
    padding-bottom: 80px;
}

.signup-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: start;
    padding-top: 40px;
}

/* --- Left: Info Panel --- */
.signup-info {
    position: sticky;
    top: 100px;
    padding: 40px;
    background: var(--navy-800);
    border-radius: 16px;
    color: var(--white);
}

.plan-badge {
    display: inline-block;
    padding: 4px 14px;
    background: rgba(20, 184, 166, 0.15);
    border: 1px solid rgba(20, 184, 166, 0.3);
    border-radius: 16px;
    color: var(--teal-400);
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    margin-bottom: 16px;
}

.signup-info h1 {
    font-size: 2rem;
    font-weight: 800;
    margin-bottom: 12px;
    letter-spacing: -0.02em;
}

.signup-subtitle {
    color: var(--slate-400);
    font-size: 1rem;
    line-height: 1.6;
    margin-bottom: 28px;
}

.plan-price {
    display: flex;
    flex-direction: column;
    gap: 4px;
    padding: 20px;
    background: rgba(20, 184, 166, 0.08);
    border: 1px solid rgba(20, 184, 166, 0.15);
    border-radius: 10px;
    margin-bottom: 32px;
}

.price-label {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--teal-400);
}

.price-note {
    font-size: 0.85rem;
    color: var(--slate-400);
}

.features-section h3 {
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--slate-400);
    margin-bottom: 16px;
}

.feature-list {
    display: flex;
    flex-direction: column;
    gap: 14px;
    margin-bottom: 32px;
}

.feature-list li {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 0.95rem;
    color: var(--slate-200);
}

.feature-list li svg {
    flex-shrink: 0;
    color: var(--teal-400);
}

.trust-signals {
    display: flex;
    gap: 24px;
    padding-top: 24px;
    border-top: 1px solid rgba(255, 255, 255, 0.08);
}

.trust-item {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.8rem;
    color: var(--slate-400);
}

.trust-item svg {
    color: var(--slate-400);
    flex-shrink: 0;
}

/* --- Right: Form Panel --- */
.signup-form-wrapper {
    background: var(--white);
    border-radius: 16px;
    box-shadow: var(--shadow-xl);
    border: 1px solid var(--slate-200);
    overflow: hidden;
}

.signup-form {
    padding: 40px;
}

.form-section {
    margin-bottom: 32px;
}

.form-section h3 {
    font-size: 1rem;
    font-weight: 700;
    color: var(--navy-800);
    margin-bottom: 20px;
    padding-bottom: 10px;
    border-bottom: 1px solid var(--slate-200);
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}

.form-group {
    margin-bottom: 16px;
}

.form-group label {
    display: block;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--navy-700);
    margin-bottom: 6px;
}

.form-group input,
.form-group select {
    width: 100%;
    padding: 10px 14px;
    border: 1.5px solid var(--slate-200);
    border-radius: 8px;
    font-family: var(--font-sans);
    font-size: 0.9rem;
    color: var(--navy-800);
    background: var(--white);
    transition: all var(--transition);
    outline: none;
}

.form-group input::placeholder {
    color: var(--slate-400);
}

.form-group input:focus,
.form-group select:focus {
    border-color: var(--teal-500);
    box-shadow: 0 0 0 3px rgba(20, 184, 166, 0.1);
}

.form-group select {
    cursor: pointer;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%2394a3b8' d='M6 8L1 3h10z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 14px center;
    padding-right: 36px;
}

.card-input-wrapper {
    position: relative;
}

.card-input-wrapper input {
    padding-right: 70px;
}

.card-icons {
    position: absolute;
    right: 12px;
    top: 50%;
    transform: translateY(-50%);
    display: flex;
    gap: 6px;
}

.form-note {
    margin-top: 16px;
    font-size: 0.8rem;
    color: var(--slate-400);
    line-height: 1.6;
    text-align: center;
}

.form-note a {
    color: var(--teal-500);
    font-weight: 500;
}

.form-note a:hover {
    color: var(--teal-600);
    text-decoration: underline;
}

/* --- FAQ Section --- */
.faq-section {
    padding: 80px 0 60px;
}

.faq-section h2 {
    font-size: 1.75rem;
    font-weight: 800;
    text-align: center;
    margin-bottom: 40px;
    color: var(--navy-800);
    letter-spacing: -0.02em;
}

.faq-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
}

.faq-item {
    background: var(--white);
    padding: 24px;
    border-radius: 12px;
    border: 1px solid var(--slate-200);
}

.faq-item h4 {
    font-size: 0.95rem;
    font-weight: 700;
    color: var(--navy-800);
    margin-bottom: 8px;
}

.faq-item p {
    font-size: 0.875rem;
    color: #64748b;
    line-height: 1.7;
}

/* --- Comparison Table --- */
.comparison-section {
    padding-bottom: 80px;
}

.comparison-section h2 {
    font-size: 1.75rem;
    font-weight: 800;
    text-align: center;
    margin-bottom: 32px;
    color: var(--navy-800);
    letter-spacing: -0.02em;
}

.comparison-table {
    width: 100%;
    border-collapse: collapse;
    background: var(--white);
    border-radius: 12px;
    overflow: hidden;
    border: 1px solid var(--slate-200);
    box-shadow: var(--shadow-sm);
}

.comparison-table thead {
    background: var(--navy-800);
}

.comparison-table th {
    padding: 14px 20px;
    font-size: 0.85rem;
    font-weight: 700;
    color: var(--white);
    text-align: center;
    letter-spacing: 0.02em;
}

.comparison-table th:first-child {
    text-align: left;
}

.comparison-table td {
    padding: 14px 20px;
    font-size: 0.875rem;
    color: var(--navy-800);
    text-align: center;
    border-bottom: 1px solid var(--slate-100);
}

.comparison-table td:first-child {
    text-align: left;
    font-weight: 500;
}

.comparison-table tbody tr:last-child td {
    border-bottom: none;
}

.comparison-table tbody tr:hover {
    background: var(--slate-50);
}

.highlight-col {
    background: rgba(20, 184, 166, 0.04);
}

.comparison-table thead .highlight-col {
    background: var(--teal-600);
}

.comparison-table td svg {
    display: inline-block;
    vertical-align: middle;
}

/* --- Footer --- */
.signup-footer {
    background: var(--navy-900);
    padding: 32px 0;
    text-align: center;
}

.footer-links {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    margin-bottom: 12px;
}

.footer-links a {
    color: var(--slate-400);
    font-size: 0.85rem;
    font-weight: 500;
    transition: color var(--transition);
}

.footer-links a:hover {
    color: var(--teal-400);
}

.footer-divider {
    color: var(--navy-600);
}

.footer-copy {
    font-size: 0.8rem;
    color: var(--navy-500);
}

/* --- Responsive --- */
@media (max-width: 900px) {
    .signup-container {
        grid-template-columns: 1fr;
        gap: 32px;
    }

    .signup-info {
        position: static;
    }

    .trust-signals {
        flex-wrap: wrap;
    }

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

@media (max-width: 600px) {
    .signup-info {
        padding: 24px;
    }

    .signup-form {
        padding: 24px;
    }

    .form-row {
        grid-template-columns: 1fr;
    }

    .signup-info h1 {
        font-size: 1.5rem;
    }

    .trust-signals {
        flex-direction: column;
        gap: 12px;
    }

    .comparison-table th,
    .comparison-table td {
        padding: 10px 12px;
        font-size: 0.8rem;
    }
}