/* Flight Name Formatter — Shared Stylesheet
   Keep in sync across: index.html, guide.html, disclaimer.html, privacy.html, contact.html
   ============================================================================ */

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

:root {
    --color-primary: #1a56db;
    --color-primary-dark: #1344b0;
    --color-bg: #f0f4f8;
    --color-surface: #ffffff;
    --color-text: #1e293b;
    --color-text-secondary: #64748b;
    --color-border: #e2e8f0;
    --color-accent: #059669;
    --color-accent-bg: #ecfdf5;
    --color-warning-bg: #fffbeb;
    --color-warning-border: #f59e0b;
    --color-danger-bg: #fef2f2;
    --color-danger-border: #ef4444;
    --color-danger-text: #991b1b;
    --radius: 12px;
    --shadow: 0 1px 3px rgba(0,0,0,0.08), 0 4px 12px rgba(0,0,0,0.04);
    --shadow-lg: 0 4px 24px rgba(0,0,0,0.10);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background: var(--color-bg);
    color: var(--color-text);
    line-height: 1.6;
    min-height: 100vh;
}

/* ── Header ──────────────────────────────────────────────────────────────── */

header {
    background: linear-gradient(135deg, #1e3a5f 0%, #1a56db 100%);
    color: #fff;
    padding: 2.25rem 1rem 1.25rem;
    text-align: center;
}

header h1 {
    font-size: 1.75rem;
    font-weight: 700;
    margin-bottom: 0.4rem;
}

header h1 a {
    color: inherit;
    text-decoration: none;
}

header p {
    font-size: 1rem;
    opacity: 0.9;
    max-width: 520px;
    margin: 0 auto;
}

/* ── Navigation ──────────────────────────────────────────────────────────── */

nav {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 0.2rem 1.1rem;
    margin-top: 0.9rem;
    padding-bottom: 0.25rem;
}

nav a {
    color: rgba(255,255,255,0.75);
    text-decoration: none;
    font-size: 0.85rem;
    font-weight: 500;
    padding: 0.15rem 0;
    transition: color 0.15s;
}

nav a:hover,
nav a[aria-current="page"] {
    color: #fff;
    text-decoration: underline;
}

/* ── Layout ──────────────────────────────────────────────────────────────── */

main {
    max-width: 640px;
    margin: 2rem auto;
    padding: 0 1rem;
}

.card {
    background: var(--color-surface);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 1.75rem;
    margin-bottom: 1.25rem;
}

/* ── Tool — Step labels ──────────────────────────────────────────────────── */

.step-label {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.8rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--color-primary);
    margin-bottom: 0.75rem;
}

.step-number {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 22px;
    height: 22px;
    border-radius: 50%;
    background: var(--color-primary);
    color: #fff;
    font-size: 0.7rem;
    font-weight: 700;
}

/* ── Form elements ───────────────────────────────────────────────────────── */

label {
    display: block;
    font-weight: 600;
    font-size: 0.95rem;
    margin-bottom: 0.5rem;
}

select,
input[type="text"],
input[type="email"],
textarea {
    width: 100%;
    padding: 0.75rem 1rem;
    font-size: 1rem;
    border: 2px solid var(--color-border);
    border-radius: 8px;
    background: var(--color-surface);
    color: var(--color-text);
    transition: border-color 0.2s;
    font-family: inherit;
}

select:focus,
input[type="text"]:focus,
input[type="email"]:focus,
textarea:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(26, 86, 219, 0.15);
}

input[type="text"]::placeholder,
input[type="email"]::placeholder,
textarea::placeholder {
    color: var(--color-text-secondary);
}

textarea {
    resize: vertical;
    min-height: 130px;
}

.hint {
    font-size: 0.82rem;
    color: var(--color-text-secondary);
    margin-top: 0.4rem;
}

.field-required {
    color: #ef4444;
    font-weight: 700;
}

.field-optional {
    font-size: 0.8rem;
    font-weight: 400;
    color: var(--color-text-secondary);
}

/* ── Tool — Result card ──────────────────────────────────────────────────── */

.result-card {
    background: var(--color-surface);
    border-radius: var(--radius);
    box-shadow: var(--shadow-lg);
    padding: 1.75rem;
    margin-bottom: 1.25rem;
    border: 2px solid var(--color-accent);
    display: none;
}

.result-card.visible {
    display: block;
}

.result-heading {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 1rem;
    font-weight: 700;
    color: var(--color-accent);
    margin-bottom: 1rem;
}

.result-heading svg {
    flex-shrink: 0;
}

.result-field {
    background: var(--color-accent-bg);
    border-radius: 8px;
    padding: 0.85rem 1rem;
    margin-bottom: 0.6rem;
}

.result-field:last-child {
    margin-bottom: 0;
}

.result-field-label {
    font-size: 0.78rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    color: var(--color-text-secondary);
    margin-bottom: 0.2rem;
}

.result-field-value {
    font-size: 1.15rem;
    font-weight: 700;
    color: var(--color-text);
    letter-spacing: 0.02em;
    word-break: break-word;
}

.tip-box {
    background: var(--color-warning-bg);
    border-left: 4px solid var(--color-warning-border);
    border-radius: 0 8px 8px 0;
    padding: 0.85rem 1rem;
    font-size: 0.85rem;
    color: var(--color-text);
    margin-top: 1rem;
    line-height: 1.5;
}

.tip-box strong {
    color: #92400e;
}

/* ── Disclaimer box ──────────────────────────────────────────────────────── */

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

.disclaimer-box h2 {
    font-size: 0.95rem;
    color: var(--color-danger-text);
    margin-bottom: 0.5rem;
}

.disclaimer-box p,
.disclaimer-box li {
    font-size: 0.82rem;
    color: var(--color-danger-text);
    line-height: 1.6;
}

.disclaimer-box ul {
    padding-left: 1.25rem;
    margin-top: 0.3rem;
}

.disclaimer-box li {
    margin-bottom: 0.2rem;
}

/* ── Guide section ───────────────────────────────────────────────────────── */

section.info-section {
    max-width: 640px;
    margin: 0 auto 2rem;
    padding: 0 1rem;
}

section.info-section .card {
    padding: 1.5rem 1.75rem;
}

section.info-section h2 {
    font-size: 1.2rem;
    margin-bottom: 0.75rem;
}

section.info-section h3 {
    font-size: 1rem;
    margin: 1.25rem 0 0.4rem;
}

section.info-section h3:first-of-type {
    margin-top: 0.75rem;
}

section.info-section p,
section.info-section li {
    font-size: 0.9rem;
    color: var(--color-text-secondary);
    line-height: 1.65;
}

section.info-section ul {
    padding-left: 1.25rem;
    margin-top: 0.3rem;
}

section.info-section li {
    margin-bottom: 0.25rem;
}

section.info-section a {
    color: var(--color-primary);
    text-decoration: none;
}

section.info-section a:hover {
    text-decoration: underline;
}

/* ── Content pages (privacy, disclaimer, contact) ────────────────────────── */

.content-page {
    max-width: 640px;
    margin: 2rem auto;
    padding: 0 1rem;
}

.content-page .card {
    padding: 2rem;
    margin-bottom: 1.5rem;
}

.content-page h1 {
    font-size: 1.4rem;
    font-weight: 700;
    margin-bottom: 0.3rem;
    color: var(--color-text);
}

.content-page .meta {
    font-size: 0.8rem;
    color: var(--color-text-secondary);
    margin-bottom: 1.5rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--color-border);
}

.content-page h2 {
    font-size: 1rem;
    font-weight: 700;
    margin: 1.5rem 0 0.4rem;
    color: var(--color-text);
}

.content-page h3 {
    font-size: 0.95rem;
    font-weight: 700;
    margin: 1.25rem 0 0.3rem;
    color: var(--color-text);
}

.content-page p {
    font-size: 0.9rem;
    color: var(--color-text-secondary);
    line-height: 1.7;
    margin-bottom: 0.6rem;
}

.content-page ul,
.content-page ol {
    padding-left: 1.5rem;
    margin-bottom: 0.75rem;
}

.content-page li {
    font-size: 0.9rem;
    color: var(--color-text-secondary);
    line-height: 1.65;
    margin-bottom: 0.3rem;
}

.content-page a {
    color: var(--color-primary);
    text-decoration: none;
}

.content-page a:hover {
    text-decoration: underline;
}

/* ── Button ──────────────────────────────────────────────────────────────── */

.btn {
    display: inline-block;
    padding: 0.7rem 1.75rem;
    background: var(--color-primary);
    color: #fff;
    border: none;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: background 0.2s;
    font-family: inherit;
    text-decoration: none;
}

.btn:hover {
    background: var(--color-primary-dark);
    text-decoration: none;
    color: #fff;
}

/* ── Footer ──────────────────────────────────────────────────────────────── */

footer {
    text-align: center;
    padding: 1.5rem 1rem;
    font-size: 0.8rem;
    color: var(--color-text-secondary);
    border-top: 1px solid var(--color-border);
    max-width: 640px;
    margin: 0 auto;
}

footer a {
    color: var(--color-primary);
    text-decoration: none;
}

footer a:hover {
    text-decoration: underline;
}

.footer-links {
    margin-top: 0.5rem;
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 0.1rem 0.6rem;
}

.footer-links a {
    color: var(--color-text-secondary);
    font-size: 0.78rem;
}

/* ── Responsive ──────────────────────────────────────────────────────────── */

@media (max-width: 480px) {
    header {
        padding: 1.75rem 1rem 1rem;
    }
    header h1 {
        font-size: 1.35rem;
    }
    .card {
        padding: 1.25rem;
    }
    .content-page .card {
        padding: 1.25rem;
    }
    nav {
        gap: 0.2rem 0.85rem;
    }
}

/* ── Toast notification ───────────────────────────────────────────────────── */

.toast {
    position: fixed;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%) translateY(120px);
    background: var(--color-accent);
    color: #fff;
    padding: 0.85rem 1.25rem;
    border-radius: 10px;
    font-size: 0.9rem;
    font-weight: 500;
    box-shadow: var(--shadow-lg);
    display: flex;
    align-items: center;
    gap: 0.75rem;
    opacity: 0;
    transition: opacity 0.35s, transform 0.35s;
    z-index: 1000;
    max-width: calc(100vw - 2rem);
}

.toast.toast-visible {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
}

.toast-close {
    background: none;
    border: none;
    color: #fff;
    cursor: pointer;
    font-size: 1.2rem;
    line-height: 1;
    padding: 0;
    opacity: 0.75;
    margin-left: 0.25rem;
}

.toast-close:hover {
    opacity: 1;
}