/* =============================================================
   FifteenSales (Fifteen Network) — Public Dark Theme
   Dark tech theme for public-facing questionnaire and sales pages
   ============================================================= */

/* -------------------------------------------------------------
   CSS Variables
   ------------------------------------------------------------- */
:root {
    --fi-bg: #0F172A;
    --fi-bg-secondary: #1E293B;
    --fi-bg-card: #1E293B;
    --fi-bg-input: rgba(255, 255, 255, 0.05);
    --fi-text: #F8FAFC;
    --fi-text-muted: #94A3B8;
    --fi-accent: #0D9488;
    --fi-accent-hover: #14B8A6;
    --fi-accent-light: rgba(13, 148, 136, 0.15);
    --fi-accent-border: rgba(13, 148, 136, 0.4);
    --fi-border: rgba(255, 255, 255, 0.08);
    --fi-border-hover: rgba(255, 255, 255, 0.15);
    --fi-error: #F87171;
    --fi-warning: #FBBF24;
    --fi-success: #34D399;
    --fi-radius-sm: 0.5rem;
    --fi-radius-md: 0.75rem;
    --fi-radius-lg: 1rem;
}

/* -------------------------------------------------------------
   Base Reset & Typography
   ------------------------------------------------------------- */
*,
*::before,
*::after {
    box-sizing: border-box;
}

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    background-color: var(--fi-bg);
    color: var(--fi-text);
    font-family: 'Inter', system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;
    font-size: 1rem;
    line-height: 1.6;
    min-height: 100vh;
    margin: 0;
    padding: 0;
    -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4, h5, h6 {
    color: var(--fi-text);
    font-weight: 700;
    line-height: 1.3;
    margin-top: 0;
}

p {
    margin-top: 0;
    color: var(--fi-text-muted);
}

a {
    color: var(--fi-accent);
    text-decoration: none;
}

a:hover {
    color: var(--fi-accent-hover);
    text-decoration: underline;
}

/* -------------------------------------------------------------
   Skip to content link (accessibility)
   ------------------------------------------------------------- */
.fi-skip-link {
    position: absolute;
    top: -100%;
    left: 0;
    background: var(--fi-accent);
    color: #fff;
    padding: 0.5rem 1rem;
    font-weight: 600;
    z-index: 9999;
    border-radius: 0 0 0.375rem 0;
    text-decoration: none;
    transition: top 0.2s;
}

.fi-skip-link:focus {
    top: 0;
    color: #fff;
}

/* -------------------------------------------------------------
   Page Wrapper
   ------------------------------------------------------------- */
.fi-page-wrapper {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

.fi-main {
    flex: 1;
    padding: 2rem 0;
}

/* -------------------------------------------------------------
   Header
   ------------------------------------------------------------- */
.fi-header {
    border-bottom: 1px solid var(--fi-border);
    padding: 1rem 0;
}

.fi-header-inner {
    max-width: 960px;
    margin: 0 auto;
    padding: 0 1rem;
    display: flex;
    align-items: center;
}

.fi-logo-link {
    text-decoration: none;
    display: flex;
    align-items: center;
}

.fi-logo-link:hover {
    text-decoration: none;
}

.fi-logo-text {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--fi-accent);
    letter-spacing: -0.5px;
}

.fi-brand-logo {
    max-height: 40px;
    max-width: 160px;
    object-fit: contain;
}

/* -------------------------------------------------------------
   Content Width Containers
   ------------------------------------------------------------- */
.fi-content {
    max-width: 720px;
    margin: 0 auto;
    padding: 0 1rem;
}

.fi-content-wide {
    max-width: 960px;
    margin: 0 auto;
    padding: 0 1rem;
}

/* -------------------------------------------------------------
   Cards
   ------------------------------------------------------------- */
.fi-card {
    background: var(--fi-bg-card);
    border-radius: var(--fi-radius-md);
    padding: 2rem;
    margin-bottom: 1.5rem;
    border: 1px solid var(--fi-border);
}

.fi-card-sm {
    padding: 1.25rem;
}

/* -------------------------------------------------------------
   Form Inputs
   ------------------------------------------------------------- */
.fi-input {
    width: 100%;
    background: var(--fi-bg-input);
    border: 1px solid var(--fi-border);
    border-radius: var(--fi-radius-sm);
    color: var(--fi-text);
    padding: 0.75rem 1rem;
    font-size: 1rem;
    font-family: inherit;
    line-height: 1.5;
    transition: border-color 0.15s, box-shadow 0.15s;
    min-height: 44px;
    appearance: none;
}

.fi-input:focus {
    outline: none;
    border-color: var(--fi-accent);
    box-shadow: 0 0 0 3px var(--fi-accent-light);
    background: rgba(255, 255, 255, 0.07);
}

.fi-input::placeholder {
    color: var(--fi-text-muted);
}

.fi-input:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

textarea.fi-input {
    resize: vertical;
    min-height: 100px;
}

select.fi-input {
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%2394A3B8' stroke-width='1.5' fill='none' stroke-linecap='round'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 1rem center;
    padding-right: 2.5rem;
    cursor: pointer;
}

/* -------------------------------------------------------------
   Form Labels
   ------------------------------------------------------------- */
.fi-label {
    display: block;
    font-size: 0.9375rem;
    font-weight: 600;
    color: var(--fi-text);
    margin-bottom: 0.5rem;
}

.fi-label-required::after {
    content: " *";
    color: var(--fi-error);
}

/* -------------------------------------------------------------
   Validation errors
   ------------------------------------------------------------- */
.fi-field-error {
    font-size: 0.8125rem;
    color: var(--fi-error);
    margin-top: 0.375rem;
    display: flex;
    align-items: center;
    gap: 0.25rem;
}

.fi-input.error {
    border-color: var(--fi-error);
    box-shadow: 0 0 0 3px rgba(248, 113, 113, 0.15);
}

/* -------------------------------------------------------------
   Buttons
   ------------------------------------------------------------- */
.fi-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    background: var(--fi-accent);
    color: #fff;
    border: none;
    border-radius: var(--fi-radius-sm);
    padding: 0.75rem 1.75rem;
    font-size: 1rem;
    font-weight: 600;
    font-family: inherit;
    cursor: pointer;
    min-height: 44px;
    transition: background 0.15s, transform 0.1s;
    text-decoration: none;
    white-space: nowrap;
}

.fi-btn:hover {
    background: var(--fi-accent-hover);
    color: #fff;
    text-decoration: none;
    transform: translateY(-1px);
}

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

.fi-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
}

.fi-btn-full {
    width: 100%;
}

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

.fi-btn-outline:hover {
    background: var(--fi-accent);
    color: #fff;
}

.fi-btn-ghost {
    background: transparent;
    border: 1px solid var(--fi-border);
    color: var(--fi-text-muted);
}

.fi-btn-ghost:hover {
    border-color: var(--fi-border-hover);
    color: var(--fi-text);
    background: rgba(255, 255, 255, 0.04);
}

/* Button loading state */
.fi-btn .fi-btn-spinner {
    display: none;
    width: 16px;
    height: 16px;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-top-color: #fff;
    border-radius: 50%;
    animation: fi-spin 0.7s linear infinite;
}

.fi-btn.loading .fi-btn-spinner {
    display: block;
}

.fi-btn.loading .fi-btn-text {
    opacity: 0.7;
}

@keyframes fi-spin {
    to { transform: rotate(360deg); }
}

/* -------------------------------------------------------------
   Navigation buttons (questionnaire single-question mode)
   ------------------------------------------------------------- */
.fi-nav-buttons {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: 2rem;
    gap: 1rem;
}

.fi-nav-buttons .fi-btn-back {
    flex-shrink: 0;
}

.fi-nav-buttons .fi-btn-next {
    margin-left: auto;
}

/* -------------------------------------------------------------
   Progress bar
   ------------------------------------------------------------- */
.fi-progress-wrap {
    margin-bottom: 1.5rem;
}

.fi-progress-label {
    font-size: 0.8125rem;
    color: var(--fi-text-muted);
    margin-bottom: 0.5rem;
    display: flex;
    justify-content: space-between;
}

.fi-progress {
    background: var(--fi-border);
    border-radius: 9999px;
    height: 0.375rem;
    overflow: hidden;
}

.fi-progress-bar {
    background: linear-gradient(90deg, var(--fi-accent), var(--fi-accent-hover));
    height: 100%;
    border-radius: 9999px;
    transition: width 0.4s ease;
}

/* -------------------------------------------------------------
   Question heading
   ------------------------------------------------------------- */
.fi-question-heading {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--fi-text);
    margin-bottom: 1.25rem;
    line-height: 1.4;
}

.fi-question-number {
    display: inline-block;
    font-size: 0.8125rem;
    color: var(--fi-accent);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 0.5rem;
}

/* -------------------------------------------------------------
   Option groups (radio / multi-select)
   ------------------------------------------------------------- */
.fi-option-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.fi-option {
    display: flex;
    align-items: center;
    padding: 0.875rem 1rem;
    background: var(--fi-bg-input);
    border: 1px solid var(--fi-border);
    border-radius: var(--fi-radius-sm);
    cursor: pointer;
    min-height: 44px;
    transition: border-color 0.15s, background 0.15s;
    user-select: none;
}

.fi-option:hover {
    border-color: var(--fi-accent-border);
    background: rgba(13, 148, 136, 0.06);
}

.fi-option input[type="radio"],
.fi-option input[type="checkbox"] {
    margin-right: 0.75rem;
    width: 18px;
    height: 18px;
    accent-color: var(--fi-accent);
    flex-shrink: 0;
    cursor: pointer;
}

.fi-option.selected {
    border-color: var(--fi-accent);
    background: var(--fi-accent-light);
}

.fi-option-text {
    flex: 1;
    color: var(--fi-text);
    font-size: 0.9375rem;
}

/* -------------------------------------------------------------
   Questionnaire sections (scrolling mode)
   ------------------------------------------------------------- */
.fi-question-section {
    margin-bottom: 2rem;
    padding-bottom: 2rem;
    border-bottom: 1px solid var(--fi-border);
    animation: fi-fade-in 0.25s ease;
}

.fi-question-section:last-of-type {
    border-bottom: none;
}

@keyframes fi-fade-in {
    from { opacity: 0; transform: translateY(6px); }
    to { opacity: 1; transform: translateY(0); }
}

.fi-question-hidden {
    display: none;
}

/* -------------------------------------------------------------
   Questionnaire title / description
   ------------------------------------------------------------- */
.fi-questionnaire-header {
    margin-bottom: 2rem;
    padding-bottom: 1.5rem;
    border-bottom: 1px solid var(--fi-border);
}

.fi-questionnaire-title {
    font-size: 1.625rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
}

.fi-questionnaire-desc {
    color: var(--fi-text-muted);
    font-size: 1rem;
    margin-bottom: 0;
}

/* -------------------------------------------------------------
   Auto-save indicator
   ------------------------------------------------------------- */
.fi-autosave {
    position: fixed;
    top: 1rem;
    right: 1rem;
    font-size: 0.75rem;
    color: var(--fi-text-muted);
    background: var(--fi-bg-secondary);
    border: 1px solid var(--fi-border);
    padding: 0.25rem 0.75rem;
    border-radius: 9999px;
    opacity: 0;
    transition: opacity 0.3s;
    z-index: 100;
}

.fi-autosave.visible {
    opacity: 1;
}

.fi-autosave.saved { color: var(--fi-success); }
.fi-autosave.saving { color: var(--fi-warning); }
.fi-autosave.error { color: var(--fi-error); }

/* -------------------------------------------------------------
   Thank you / message pages
   ------------------------------------------------------------- */
.fi-message-page {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 50vh;
    text-align: center;
    padding: 4rem 1rem;
}

.fi-message-icon {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2.5rem;
    margin-bottom: 1.5rem;
}

.fi-message-icon-success {
    background: rgba(52, 211, 153, 0.15);
    color: var(--fi-success);
}

.fi-message-icon-info {
    background: rgba(13, 148, 136, 0.15);
    color: var(--fi-accent);
}

.fi-message-title {
    font-size: 1.75rem;
    font-weight: 700;
    margin-bottom: 0.75rem;
    color: var(--fi-text);
}

.fi-message-body {
    color: var(--fi-text-muted);
    font-size: 1.0625rem;
    max-width: 480px;
    margin-bottom: 2rem;
}

/* -------------------------------------------------------------
   Footer
   ------------------------------------------------------------- */
.fi-footer {
    padding: 1.5rem 1rem;
    border-top: 1px solid var(--fi-border);
    margin-top: auto;
}

.fi-footer-inner {
    max-width: 960px;
    margin: 0 auto;
    text-align: center;
    color: var(--fi-text-muted);
    font-size: 0.8125rem;
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    align-items: center;
    gap: 0.375rem;
}

.fi-footer-brand {
    color: var(--fi-accent);
    font-weight: 600;
}

.fi-footer-brand:hover {
    color: var(--fi-accent-hover);
}

.fi-footer-link {
    color: var(--fi-text-muted);
    text-decoration: none;
}

.fi-footer-link:hover {
    color: var(--fi-text);
    text-decoration: underline;
}

.fi-footer-sep {
    color: var(--fi-border-hover);
}

.fi-recaptcha-notice {
    font-size: 0.75rem;
    color: var(--fi-text-muted);
    opacity: 0.75;
}

/* -------------------------------------------------------------
   Sales page rendered content area
   ------------------------------------------------------------- */
.fi-sales-content {
    max-width: 960px;
    margin: 0 auto;
    padding: 3rem 1rem;
}

.fi-sales-content h1,
.fi-sales-content h2,
.fi-sales-content h3,
.fi-sales-content h4 {
    color: var(--fi-text);
    margin-top: 2rem;
    margin-bottom: 1rem;
}

.fi-sales-content p {
    color: var(--fi-text-muted);
    line-height: 1.8;
}

.fi-sales-content a {
    color: var(--fi-accent);
}

.fi-sales-content ul,
.fi-sales-content ol {
    color: var(--fi-text-muted);
    padding-left: 1.5rem;
    line-height: 1.8;
}

.fi-sales-content blockquote {
    border-left: 3px solid var(--fi-accent);
    padding-left: 1.25rem;
    margin-left: 0;
    color: var(--fi-text-muted);
    font-style: italic;
}

.fi-sales-content img {
    max-width: 100%;
    height: auto;
    border-radius: var(--fi-radius-md);
}

.fi-sales-content table {
    width: 100%;
    border-collapse: collapse;
}

.fi-sales-content th,
.fi-sales-content td {
    padding: 0.75rem 1rem;
    border: 1px solid var(--fi-border);
    text-align: left;
}

.fi-sales-content th {
    background: var(--fi-bg-secondary);
    font-weight: 600;
    color: var(--fi-text);
}

/* -------------------------------------------------------------
   Error pages
   ------------------------------------------------------------- */
.fi-error-page {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 60vh;
    text-align: center;
    padding: 4rem 1rem;
}

.fi-error-code {
    font-size: 6rem;
    font-weight: 800;
    color: var(--fi-accent);
    line-height: 1;
    margin-bottom: 1rem;
    opacity: 0.6;
}

.fi-error-title {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 0.75rem;
}

.fi-error-body {
    color: var(--fi-text-muted);
    margin-bottom: 2rem;
}

/* -------------------------------------------------------------
   Content width containers
   ------------------------------------------------------------- */
.fi-content-wide {
    max-width: 960px;
    margin: 0 auto;
    padding: 3rem 1.5rem;
    width: 100%;
}

/* -------------------------------------------------------------
   Coming Soon placeholder (sales page empty state)
   ------------------------------------------------------------- */
.fi-sales-coming-soon {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 60vh;
    text-align: center;
    padding: 4rem 1rem;
}

.fi-coming-soon-logo {
    margin-bottom: 2rem;
}

.fi-coming-soon-brand {
    font-size: 3rem;
    font-weight: 800;
    color: var(--fi-accent);
    letter-spacing: -0.02em;
}

.fi-coming-soon-heading {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--fi-text);
    margin-bottom: 1rem;
}

.fi-coming-soon-tagline {
    color: var(--fi-text-muted);
    font-size: 1.125rem;
    margin: 0;
}

/* -------------------------------------------------------------
   Error banner (questionnaire inline error)
   ------------------------------------------------------------- */
.fi-error-banner {
    background: rgba(248, 113, 113, 0.1);
    border: 1px solid var(--fi-error);
    border-radius: var(--fi-radius-sm);
    color: var(--fi-error);
    padding: 0.75rem 1rem;
    margin-bottom: 1.25rem;
    font-size: 0.9375rem;
}

/* -------------------------------------------------------------
   Submit wrap (scrolling mode submit button container)
   ------------------------------------------------------------- */
.fi-submit-wrap {
    margin-top: 2rem;
    padding-top: 1.5rem;
    border-top: 1px solid var(--fi-border);
}

/* -------------------------------------------------------------
   Lead capture form
   ------------------------------------------------------------- */
.fi-lead-form {
    border: none;
    padding: 0;
    margin: 0;
}

/* -------------------------------------------------------------
   Form group (lead field wrapper)
   ------------------------------------------------------------- */
.fi-form-group {
    margin-bottom: 1rem;
}

/* -------------------------------------------------------------
   Responsive
   ------------------------------------------------------------- */
@media (max-width: 767.98px) {
    .fi-card {
        padding: 1.25rem;
    }

    .fi-questionnaire-title {
        font-size: 1.25rem;
    }

    .fi-btn {
        min-height: 48px;
        font-size: 1rem;
    }

    .fi-option {
        min-height: 52px;
    }

    .fi-nav-buttons {
        flex-direction: column;
    }

    .fi-nav-buttons .fi-btn {
        width: 100%;
    }

    .fi-error-code {
        font-size: 4rem;
    }
}