/* ===========================================================================
   Trip Sahabat – style.css
   Design tokens, reset, base typography, layout primitives, buttons and forms.
   Mobile-first: wider layouts are added in responsive.css.
   =========================================================================== */

/* ---------------------------------------------------------------------------
   1. DESIGN TOKENS
   ------------------------------------------------------------------------ */
:root {
    /* Brand palette */
    --c-black: #000000;
    --c-bg: #F8F9FA;
    --c-red: #FF0000;
    --c-red-deep: #E60000;
    --c-gray: #E5E7EB;
    --c-charcoal: #1F2937;
    --c-white: #FFFFFF;
    --c-gold: #FFCC00;

    /* Derived helpers */
    --c-text: var(--c-charcoal);
    --c-muted: #4B5563;
    --c-muted-soft: #6B7280;
    --c-border: #D8DCE2;
    --c-surface: var(--c-white);
    --c-surface-alt: var(--c-gray);
    --c-overlay: rgba(15, 18, 24, 0.62);
    --c-overlay-soft: rgba(15, 18, 24, 0.42);

    /* Typography */
    --font-body: 'Inter', ui-sans-serif, system-ui, -apple-system, 'Segoe UI', Roboto,
        'Helvetica Neue', Arial, sans-serif;

    /* Radii */
    --radius-xs: 6px;
    --radius-sm: 10px;
    --radius: 14px;
    --radius-lg: 20px;
    --radius-pill: 999px;

    /* Shadows */
    --shadow-xs: 0 1px 2px rgba(17, 24, 39, 0.06);
    --shadow-sm: 0 2px 6px rgba(17, 24, 39, 0.07);
    --shadow-md: 0 10px 26px rgba(17, 24, 39, 0.09);
    --shadow-lg: 0 20px 48px rgba(17, 24, 39, 0.14);

    /* Spacing scale */
    --space-1: 0.25rem;
    --space-2: 0.5rem;
    --space-3: 0.75rem;
    --space-4: 1rem;
    --space-5: 1.5rem;
    --space-6: 2rem;
    --space-7: 3rem;
    --space-8: 4rem;

    /* Layout */
    --container: 1200px;
    --container-narrow: 820px;
    --header-height: 66px;

    /* Motion */
    --transition: 180ms ease;
    --transition-slow: 320ms ease;
}

/* ---------------------------------------------------------------------------
   2. RESET
   ------------------------------------------------------------------------ */
*,
*::before,
*::after { box-sizing: border-box; }

html {
    -webkit-text-size-adjust: 100%;
    scroll-behavior: smooth;
}

body {
    margin: 0;
    background-color: var(--c-bg);
    color: var(--c-text);
    font-family: var(--font-body);
    font-size: 1rem;
    line-height: 1.65;
    font-weight: 400;
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
}

img,
picture,
svg,
video {
    max-width: 100%;
    height: auto;
    display: block;
}

ul,
ol { margin: 0; padding: 0; list-style: none; }

a {
    color: var(--c-red-deep);
    text-decoration: none;
    transition: color var(--transition), background-color var(--transition), border-color var(--transition);
}

a:hover { color: var(--c-red); }

button { font: inherit; color: inherit; }

h1, h2, h3, h4, h5, h6 {
    margin: 0 0 var(--space-3);
    color: var(--c-charcoal);
    font-weight: 700;
    line-height: 1.22;
    letter-spacing: -0.01em;
}

h1 { font-size: clamp(1.9rem, 5vw, 3.1rem); }
h2 { font-size: clamp(1.5rem, 3.6vw, 2.15rem); }
h3 { font-size: clamp(1.1rem, 2.4vw, 1.3rem); }

p { margin: 0 0 var(--space-4); }
p:last-child { margin-bottom: 0; }

strong { font-weight: 600; color: var(--c-charcoal); }

hr {
    border: 0;
    border-top: 1px solid var(--c-border);
    margin: var(--space-6) 0;
}

code {
    font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
    font-size: 0.9em;
    background: var(--c-surface-alt);
    padding: 0.1em 0.35em;
    border-radius: var(--radius-xs);
}

blockquote {
    margin: var(--space-5) 0;
    padding-left: var(--space-4);
    border-left: 3px solid var(--c-red);
    color: var(--c-muted);
}

/* ---------------------------------------------------------------------------
   3. FOCUS & ACCESSIBILITY BASICS
   ------------------------------------------------------------------------ */
:focus-visible {
    outline: 3px solid var(--c-red);
    outline-offset: 2px;
    border-radius: var(--radius-xs);
}

.skip-link {
    position: absolute;
    left: -9999px;
    top: 0;
    z-index: 999;
    padding: var(--space-3) var(--space-4);
    background: var(--c-red);
    color: var(--c-white);
    font-weight: 600;
    border-radius: 0 0 var(--radius-sm) 0;
}

.skip-link:focus {
    left: 0;
    color: var(--c-white);
}

.sr-only {
    position: absolute !important;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

@media (prefers-reduced-motion: reduce) {
    html { scroll-behavior: auto; }
    *,
    *::before,
    *::after {
        animation-duration: 0.001ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.001ms !important;
    }
}
/* ---------------------------------------------------------------------------
   4. LAYOUT PRIMITIVES
   ------------------------------------------------------------------------ */
.container {
    width: 100%;
    max-width: var(--container);
    margin-inline: auto;
    padding-inline: var(--space-4);
}

.container-narrow { max-width: var(--container-narrow); }

.section { padding-block: var(--space-7); }

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

.section-tight { padding-block: var(--space-6); }

.section-tight-top {
    padding-top: var(--space-6);
    padding-bottom: var(--space-7);
}

.site-main { display: block; min-height: 40vh; }

/* Card grid: one column on phones, more columns from responsive.css */
.card-grid {
    display: grid;
    gap: var(--space-5);
    grid-template-columns: 1fr;
}

.button-row {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-3);
    margin-top: var(--space-5);
}

/* ---------------------------------------------------------------------------
   5. BUTTONS
   ------------------------------------------------------------------------ */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.72rem 1.15rem;
    border: 2px solid transparent;
    border-radius: var(--radius-pill);
    background-color: var(--c-red);
    color: var(--c-white);
    font-size: 0.95rem;
    font-weight: 600;
    line-height: 1.2;
    text-align: center;
    cursor: pointer;
    transition: background-color var(--transition), color var(--transition),
        border-color var(--transition), transform var(--transition), box-shadow var(--transition);
}

.btn i { font-size: 0.95em; }

.btn-primary {
    background-color: var(--c-red);
    color: var(--c-white);
    box-shadow: var(--shadow-sm);
}

.btn-primary:hover,
.btn-primary:focus-visible {
    background-color: var(--c-red-deep);
    color: var(--c-white);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.btn-dark { background-color: var(--c-black); color: var(--c-white); }

.btn-dark:hover,
.btn-dark:focus-visible { background-color: var(--c-charcoal); color: var(--c-white); }

.btn-outline {
    background-color: transparent;
    color: var(--c-charcoal);
    border-color: var(--c-border);
}

.btn-outline:hover,
.btn-outline:focus-visible {
    border-color: var(--c-red);
    color: var(--c-red-deep);
    background-color: rgba(255, 0, 0, 0.04);
}

.btn-ghost {
    background-color: transparent;
    color: var(--c-muted);
    border-color: transparent;
}

.btn-ghost:hover,
.btn-ghost:focus-visible { background-color: var(--c-surface-alt); color: var(--c-charcoal); }

.btn-ghost-light {
    background-color: rgba(255, 255, 255, 0.14);
    color: var(--c-white);
    border-color: rgba(255, 255, 255, 0.55);
}

.btn-ghost-light:hover,
.btn-ghost-light:focus-visible {
    background-color: var(--c-white);
    color: var(--c-charcoal);
    border-color: var(--c-white);
}

.btn-whatsapp { background-color: #128C7E; color: var(--c-white); }

.btn-whatsapp:hover,
.btn-whatsapp:focus-visible {
    background-color: #0E6F63;
    color: var(--c-white);
    transform: translateY(-1px);
}

.btn-lg { padding: 0.9rem 1.6rem; font-size: 1.02rem; }
.btn-sm { padding: 0.5rem 0.95rem; font-size: 0.875rem; }
.btn-block { width: 100%; margin-bottom: var(--space-3); }

.btn[disabled],
.btn[aria-disabled='true'] { opacity: 0.55; cursor: not-allowed; transform: none; }

/* Text link with a moving arrow */
.link-arrow {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    font-weight: 600;
    font-size: 0.92rem;
    color: var(--c-red-deep);
}

.link-arrow i { transition: transform var(--transition); }
.link-arrow:hover i { transform: translateX(3px); }

/* ---------------------------------------------------------------------------
   6. BADGES, PILLS & SMALL LABELS
   ------------------------------------------------------------------------ */
.badge {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    padding: 0.3rem 0.65rem;
    border-radius: var(--radius-pill);
    background-color: var(--c-white);
    color: var(--c-charcoal);
    font-size: 0.75rem;
    font-weight: 600;
    box-shadow: var(--shadow-xs);
}

.badge-featured { background-color: var(--c-gold); color: #3A2A00; }
.badge-duration { background-color: rgba(15, 18, 24, 0.82); color: var(--c-white); }
.badge-region { background-color: rgba(255, 255, 255, 0.92); color: var(--c-charcoal); }

.placeholder-flag {
    display: inline-block;
    padding: 0.05rem 0.4rem;
    margin-inline-start: 0.2rem;
    border: 1px dashed var(--c-muted-soft);
    border-radius: var(--radius-xs);
    background-color: #FFF8E1;
    color: #7A5B00;
    font-size: 0.7rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    vertical-align: middle;
    cursor: help;
}

.required-mark { color: var(--c-red-deep); font-weight: 700; }

/* ---------------------------------------------------------------------------
   7. FORMS
   ------------------------------------------------------------------------ */
.form-group { margin-bottom: var(--space-4); }

.form-row {
    display: grid;
    gap: 0;
    grid-template-columns: 1fr;
}

.form-label {
    display: block;
    margin-bottom: 0.35rem;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--c-charcoal);
}

.form-control {
    display: block;
    width: 100%;
    padding: 0.68rem 0.85rem;
    border: 1px solid var(--c-border);
    border-radius: var(--radius-sm);
    background-color: var(--c-white);
    color: var(--c-charcoal);
    font-family: inherit;
    font-size: 0.95rem;
    line-height: 1.4;
    transition: border-color var(--transition), box-shadow var(--transition);
}

.form-control::placeholder { color: #9AA1AC; }

.form-control:focus {
    border-color: var(--c-red);
    box-shadow: 0 0 0 3px rgba(255, 0, 0, 0.12);
    outline: none;
}

textarea.form-control { resize: vertical; min-height: 7rem; }

select.form-control {
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16' fill='%231F2937'%3E%3Cpath d='M8 11.5 2.5 6h11z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 0.75rem center;
    background-size: 0.75rem;
    padding-right: 2.2rem;
}

.input-with-icon { position: relative; }

.input-with-icon > i {
    position: absolute;
    left: 0.85rem;
    top: 50%;
    transform: translateY(-50%);
    color: var(--c-muted-soft);
    font-size: 0.85rem;
    pointer-events: none;
}

.input-with-icon .form-control { padding-left: 2.3rem; }

.form-hint {
    margin: 0.3rem 0 0;
    font-size: 0.78rem;
    color: var(--c-muted-soft);
}

.form-error {
    margin: 0.3rem 0 0;
    color: var(--c-red-deep);
    font-size: 0.82rem;
    font-weight: 600;
}

.form-control.is-invalid {
    border-color: var(--c-red);
    background-color: #FFF5F5;
}

.form-control.is-valid { border-color: #15803D; }

.form-group--checkbox {
    display: flex;
    flex-wrap: wrap;
    align-items: flex-start;
    gap: 0.6rem;
}

.form-checkbox {
    width: 1.15rem;
    height: 1.15rem;
    margin-top: 0.2rem;
    accent-color: var(--c-red);
    flex: 0 0 auto;
}

.checkbox-label {
    flex: 1 1 12rem;
    font-size: 0.88rem;
    color: var(--c-muted);
}

.form-actions {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-3);
    align-items: center;
}

.form-status {
    margin-top: var(--space-4);
    padding: var(--space-4);
    border-radius: var(--radius-sm);
    border-left: 4px solid #15803D;
    background-color: #ECFDF3;
    color: #14532D;
    font-size: 0.9rem;
}

.form-status[data-status='error'] {
    border-left-color: var(--c-red-deep);
    background-color: #FFF1F1;
    color: #7F1D1D;
}

.form-status i { margin-right: 0.35rem; }

/* ---------------------------------------------------------------------------
   8. SMALL SHARED LISTS & BOXES
   ------------------------------------------------------------------------ */
.tick-list { display: grid; gap: 0.5rem; }

.tick-list li {
    display: flex;
    align-items: flex-start;
    gap: 0.55rem;
    font-size: 0.94rem;
    color: var(--c-muted);
}

.tick-list i {
    color: var(--c-red);
    margin-top: 0.28rem;
    font-size: 0.85rem;
}

.tick-list--compact li { font-size: 0.88rem; }

.chip-list {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.chip-list li {
    padding: 0.45rem 0.85rem;
    border: 1px solid var(--c-border);
    border-radius: var(--radius-pill);
    background-color: var(--c-white);
    font-size: 0.85rem;
    color: var(--c-muted);
}

.notice-box {
    padding: var(--space-4) var(--space-5);
    border-radius: var(--radius);
    border: 1px solid var(--c-border);
    background-color: var(--c-white);
    box-shadow: var(--shadow-xs);
}

.notice-box h2,
.notice-box h3 {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 1rem;
    margin-bottom: var(--space-2);
}

.notice-box ul { display: grid; gap: 0.4rem; }

.notice-box li {
    display: flex;
    gap: 0.5rem;
    font-size: 0.88rem;
    color: var(--c-muted);
}

.notice-box li::before {
    content: '\f0da';
    font-family: 'Font Awesome 6 Free';
    font-weight: 900;
    color: var(--c-muted-soft);
    font-size: 0.75rem;
    margin-top: 0.35rem;
}

.notice-box--warning {
    border-color: var(--c-gold);
    background-color: #FFFBEB;
}

.notice-box--warning h2,
.notice-box--warning h3 { color: #7A5B00; }

.notice-box--info { border-color: #BFD7FE; background-color: #F0F6FF; }

.notice-box--muted { background-color: var(--c-surface-alt); }

.notice-box--muted h3 { color: var(--c-muted); }