/* ---------------------------------------------------------
   Design tokens
   Palette: deep navy hull + warm stamp-amber accent, evoking
   a shipping manifest / customs release stamp — fitting for
   a booking-reference lookup tool.
--------------------------------------------------------- */
:root {
    --navy: #142B4D;
    --navy-deep: #0D1D33;
    --amber: #E8A33D;
    --amber-deep: #C9812A;
    --ink: #1C2430;
    --paper: #F5F6F8;
    --paper-card: #FFFFFF;
    --line: #E1E5EA;
    --muted: #6B7688;
    --success-bg: #EFFBF6;
    --success-line: #B6E4D6;
    --success-text: #146C55;
    --error-bg: #FDEEEE;
    --error-line: #F2BDBD;
    --error-text: #A32E2E;

    --font-display: 'Space Grotesk', 'Segoe UI', sans-serif;
    --font-body: 'Inter', 'Segoe UI', sans-serif;
    --font-mono: 'IBM Plex Mono', 'Courier New', monospace;
}

@font-face {
    font-family: 'Space Grotesk';
    src: local('Space Grotesk');
}

* {
    box-sizing: border-box;
}

html, body {
    margin: 0;
    padding: 0;
    background: var(--paper);
    color: var(--ink);
    font-family: var(--font-body);
    -webkit-font-smoothing: antialiased;
}

body {
    background-image:
        linear-gradient(180deg, var(--navy) 0%, var(--navy) 140px, var(--paper) 140px);
}

.page {
    max-width: 640px;
    margin: 0 auto;
    padding: 40px 20px 60px;
}

/* ---------------- Header ---------------- */

.app-header {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 8px 4px 32px;
}

.app-header__icon {
    flex: 0 0 auto;
    width: 52px;
    height: 52px;
    border-radius: 12px;
    background: var(--amber);
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 14px rgba(0,0,0,0.18);
}

.app-header h1 {
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 600;
    color: #fff;
    margin: 0 0 4px;
    letter-spacing: -0.01em;
}

.app-header p {
    margin: 0;
    color: rgba(255,255,255,0.75);
    font-size: 0.92rem;
    line-height: 1.4;
}

/* ---------------- Card ---------------- */

.card {
    background: var(--paper-card);
    border-radius: 16px;
    border: 1px solid var(--line);
    box-shadow: 0 12px 28px rgba(20, 43, 77, 0.08);
    padding: 32px;
}

/* ---------------- Dropzone ---------------- */

.dropzone {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 10px;
    border: 2px dashed #C7CEDA;
    border-radius: 12px;
    padding: 36px 20px;
    cursor: pointer;
    text-align: center;
    background: #FAFBFC;
    transition: border-color 0.15s ease, background 0.15s ease;
}

.dropzone:hover,
.dropzone.dragover {
    border-color: var(--amber);
    background: #FFF8ED;
}

.dropzone.has-file {
    border-color: var(--success-line);
    background: var(--success-bg);
}

.dropzone input[type="file"] {
    display: none;
}

.dropzone__title {
    font-weight: 600;
    font-size: 0.98rem;
    color: var(--navy);
}

.dropzone__filename {
    font-size: 0.85rem;
    color: var(--muted);
    font-family: var(--font-mono);
}

/* ---------------- Buttons ---------------- */

.btn-primary {
    width: 100%;
    margin-top: 20px;
    padding: 14px 20px;
    border: none;
    border-radius: 10px;
    background: var(--navy);
    color: #fff;
    font-family: var(--font-display);
    font-weight: 600;
    font-size: 1rem;
    letter-spacing: 0.01em;
    cursor: pointer;
    transition: background 0.15s ease, transform 0.05s ease;
}

.btn-primary:hover {
    background: var(--navy-deep);
}

.btn-primary:active {
    transform: translateY(1px);
}

.btn-copy {
    flex: 0 0 auto;
    padding: 0 18px;
    border: none;
    border-radius: 8px;
    background: var(--navy);
    color: #fff;
    font-family: var(--font-body);
    font-weight: 600;
    font-size: 0.85rem;
    cursor: pointer;
    transition: background 0.15s ease;
}

.btn-copy:hover {
    background: var(--navy-deep);
}

.btn-copy--copied {
    background: var(--success-text);
}

/* ---------------- Alerts ---------------- */

.alert {
    margin-top: 20px;
    padding: 14px 16px;
    border-radius: 10px;
    font-size: 0.92rem;
    line-height: 1.45;
}

.alert--error {
    background: var(--error-bg);
    border: 1px solid var(--error-line);
    color: var(--error-text);
}

/* ---------------- Result ---------------- */

.result {
    margin-top: 28px;
    padding-top: 24px;
    border-top: 1px dashed var(--line);
}

.result__label {
    display: block;
    font-family: var(--font-display);
    font-size: 0.78rem;
    font-weight: 600;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--muted);
    margin-bottom: 8px;
}

.result__box-wrap {
    display: flex;
    gap: 10px;
    background: var(--success-bg);
    border: 1px solid var(--success-line);
    border-radius: 10px;
    padding: 6px 6px 6px 16px;
    align-items: center;
}

.result__box {
    flex: 1 1 auto;
    border: none;
    background: transparent;
    font-family: var(--font-mono);
    font-size: 1.25rem;
    font-weight: 600;
    letter-spacing: 0.03em;
    color: var(--success-text);
    padding: 10px 0;
    outline: none;
}

.result__filename {
    margin: 10px 2px 0;
    font-size: 0.8rem;
    color: var(--muted);
}

/* ---------------- Raw text preview ---------------- */

.raw-text {
    margin-top: 24px;
}

.raw-text summary {
    cursor: pointer;
    font-size: 0.85rem;
    color: var(--muted);
    font-weight: 600;
    outline: none;
}

.raw-text summary:hover {
    color: var(--navy);
}

.raw-text textarea {
    width: 100%;
    margin-top: 12px;
    padding: 14px;
    border-radius: 8px;
    border: 1px solid var(--line);
    background: #FBFBFC;
    font-family: var(--font-mono);
    font-size: 0.78rem;
    color: var(--ink);
    resize: vertical;
}

/* ---------------- Footer ---------------- */

.app-footer {
    text-align: center;
    margin-top: 28px;
}

.app-footer p {
    margin: 0;
    font-size: 0.8rem;
    color: var(--muted);
}

/* ---------------- Responsive ---------------- */

@media (max-width: 480px) {
    .card {
        padding: 22px;
    }
    .app-header h1 {
        font-size: 1.25rem;
    }
    .result__box {
        font-size: 1.05rem;
    }
}