/* ============================================================
   HOLIDAYSEVA — BUTTON SYSTEM
   Apple-inspired aesthetics · Airbnb-style component structure
   ============================================================
   Import after colors.css. All tokens reference CSS variables
   defined in colors.css. Any additional tokens needed are
   declared locally under :root below.
   ============================================================ */

:root {
    /* Button-specific tokens (mirrors/extends colors.css) */
    --btn-font: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Helvetica Neue", Arial, sans-serif;
    --btn-font-weight: 600;
    --btn-letter-spacing: -0.01em;

    /* Sizing scale */
    --btn-h-xs: 28px;
    --btn-h-sm: 36px;
    --btn-h-md: 44px;
    /* default — Apple touch target */
    --btn-h-lg: 52px;
    --btn-h-xl: 60px;

    --btn-px-xs: 10px;
    --btn-px-sm: 14px;
    --btn-px-md: 20px;
    --btn-px-lg: 28px;
    --btn-px-xl: 36px;

    --btn-fs-xs: 11px;
    --btn-fs-sm: 13px;
    --btn-fs-md: 15px;
    --btn-fs-lg: 16px;
    --btn-fs-xl: 18px;

    /* Radii */
    --btn-radius-pill: 999px;
    --btn-radius-md: 12px;
    --btn-radius-sm: 8px;

    /* Transitions */
    --btn-transition: background-color 160ms cubic-bezier(0.4, 0, 0.2, 1),
        color 160ms cubic-bezier(0.4, 0, 0.2, 1),
        border-color 160ms cubic-bezier(0.4, 0, 0.2, 1),
        box-shadow 200ms cubic-bezier(0.4, 0, 0.2, 1),
        transform 120ms cubic-bezier(0.4, 0, 0.2, 1),
        opacity 160ms cubic-bezier(0.4, 0, 0.2, 1);

    /* Focus rings */
    --btn-focus-primary: 0 0 0 3px rgba(255, 56, 92, 0.30);
    --btn-focus-dark: 0 0 0 3px rgba(34, 34, 34, 0.22);
    --btn-focus-danger: 0 0 0 3px rgba(193, 53, 21, 0.28);
    --btn-focus-accent: 0 0 0 3px rgba(0, 166, 153, 0.28);

    /* Shadows */
    --btn-shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.10), 0 1px 2px rgba(0, 0, 0, 0.06);
    --btn-shadow-md: 0 4px 12px rgba(0, 0, 0, 0.12), 0 2px 4px rgba(0, 0, 0, 0.06);
    --btn-shadow-hover: 0 6px 20px rgba(0, 0, 0, 0.14), 0 2px 6px rgba(0, 0, 0, 0.08);
}


/* ============================================================
     BASE .btn
     ============================================================ */
.btn {
    /* Layout */
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    white-space: nowrap;
    text-decoration: none;
    vertical-align: middle;

    /* Default size (md) */
    height: var(--btn-h-md);
    padding: 0 var(--btn-px-md);

    /* Typography */
    font-family: var(--btn-font);
    font-size: var(--btn-fs-md);
    font-weight: var(--btn-font-weight);
    letter-spacing: var(--btn-letter-spacing);
    line-height: 1;

    /* Shape */
    border-radius: var(--btn-radius-pill);
    border: 1.5px solid transparent;

    /* Interaction */
    cursor: pointer;
    user-select: none;
    -webkit-tap-highlight-color: transparent;
    transition: var(--btn-transition);
    position: relative;
    overflow: hidden;

    /* Defaults (ghost-like neutral) */
    background: transparent;
    color: var(--color-text-primary);
}

/* Remove outline — we use custom focus ring */
.btn:focus {
    outline: none;
}

/* Active press micro-interaction */
.btn:active:not(:disabled):not([aria-disabled="true"]) {
    transform: scale(0.97);
}

/* Icon inside button */
.btn .btn-icon {
    display: inline-flex;
    align-items: center;
    flex-shrink: 0;
    width: 1.2em;
    height: 1.2em;
}

/* Loading spinner */
.btn .btn-spinner {
    width: 16px;
    height: 16px;
    border: 2px solid currentColor;
    border-top-color: transparent;
    border-radius: 50%;
    animation: btn-spin 0.65s linear infinite;
    flex-shrink: 0;
}

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


/* ============================================================
     VARIANTS
     ============================================================ */

/* ── Primary (Airbnb coral / rose — main CTA) ──────────────── */
.btn-primary {
    background: var(--color-primary, #FF385C);
    color: #ffffff;
    border-color: var(--color-primary, #FF385C);
    box-shadow: var(--btn-shadow-sm);
}

.btn-primary:hover:not(:disabled):not([aria-disabled="true"]) {
    background: #E8314F;
    border-color: #E8314F;
    box-shadow: var(--btn-shadow-hover);
}

.btn-primary:active:not(:disabled):not([aria-disabled="true"]) {
    background: #CC2B47;
    border-color: #CC2B47;
    box-shadow: var(--btn-shadow-sm);
}

.btn-primary:focus-visible {
    box-shadow: var(--btn-focus-primary);
}


/* ── Secondary (dark / filled) ──────────────────────────────── */
.btn-secondary {
    background: var(--color-secondary, #222222);
    color: #ffffff;
    border-color: var(--color-secondary, #222222);
    box-shadow: var(--btn-shadow-sm);
}

.btn-secondary:hover:not(:disabled):not([aria-disabled="true"]) {
    background: #3a3a3a;
    border-color: #3a3a3a;
    box-shadow: var(--btn-shadow-hover);
}

.btn-secondary:active:not(:disabled):not([aria-disabled="true"]) {
    background: #111111;
    border-color: #111111;
}

.btn-secondary:focus-visible {
    box-shadow: var(--btn-focus-dark);
}


/* ── Outline / Bordered ─────────────────────────────────────── */
.btn-outline {
    background: transparent;
    color: var(--color-text-primary, #222222);
    border-color: var(--color-border-dark, #B0B0B0);
}

.btn-outline:hover:not(:disabled):not([aria-disabled="true"]) {
    background: rgba(34, 34, 34, 0.04);
    border-color: var(--color-secondary, #222222);
    color: var(--color-secondary, #222222);
}

.btn-outline:active:not(:disabled):not([aria-disabled="true"]) {
    background: rgba(34, 34, 34, 0.08);
}

.btn-outline:focus-visible {
    box-shadow: var(--btn-focus-dark);
}


/* ── Ghost (text-only, no border/bg) ───────────────────────── */
.btn-ghost {
    background: transparent;
    color: var(--color-text-primary, #222222);
    border-color: transparent;
}

.btn-ghost:hover:not(:disabled):not([aria-disabled="true"]) {
    background: rgba(34, 34, 34, 0.06);
}

.btn-ghost:active:not(:disabled):not([aria-disabled="true"]) {
    background: rgba(34, 34, 34, 0.10);
}

.btn-ghost:focus-visible {
    box-shadow: var(--btn-focus-dark);
}


/* ── Ghost Primary (rose text, no bg) ──────────────────────── */
.btn-ghost-primary {
    background: transparent;
    color: var(--color-primary, #FF385C);
    border-color: transparent;
}

.btn-ghost-primary:hover:not(:disabled):not([aria-disabled="true"]) {
    background: rgba(255, 56, 92, 0.06);
}

.btn-ghost-primary:active:not(:disabled):not([aria-disabled="true"]) {
    background: rgba(255, 56, 92, 0.12);
}

.btn-ghost-primary:focus-visible {
    box-shadow: var(--btn-focus-primary);
}


/* ── Soft / Tinted (light coral fill) ──────────────────────── */
.btn-soft {
    background: rgba(255, 56, 92, 0.10);
    color: var(--color-primary, #FF385C);
    border-color: transparent;
}

.btn-soft:hover:not(:disabled):not([aria-disabled="true"]) {
    background: rgba(255, 56, 92, 0.16);
}

.btn-soft:active:not(:disabled):not([aria-disabled="true"]) {
    background: rgba(255, 56, 92, 0.22);
}

.btn-soft:focus-visible {
    box-shadow: var(--btn-focus-primary);
}


/* ── Accent (teal) ──────────────────────────────────────────── */
.btn-accent {
    background: var(--color-accent, #00A699);
    color: #ffffff;
    border-color: var(--color-accent, #00A699);
    box-shadow: var(--btn-shadow-sm);
}

.btn-accent:hover:not(:disabled):not([aria-disabled="true"]) {
    background: var(--color-accent-dark, #008C81);
    border-color: var(--color-accent-dark, #008C81);
    box-shadow: var(--btn-shadow-hover);
}

.btn-accent:active:not(:disabled):not([aria-disabled="true"]) {
    background: #007870;
    border-color: #007870;
}

.btn-accent:focus-visible {
    box-shadow: var(--btn-focus-accent);
}


/* ── Danger / Destructive ───────────────────────────────────── */
.btn-danger {
    background: var(--color-error, #C13515);
    color: #ffffff;
    border-color: var(--color-error, #C13515);
    box-shadow: var(--btn-shadow-sm);
}

.btn-danger:hover:not(:disabled):not([aria-disabled="true"]) {
    background: #A82C10;
    border-color: #A82C10;
    box-shadow: var(--btn-shadow-hover);
}

.btn-danger:active:not(:disabled):not([aria-disabled="true"]) {
    background: #8E240D;
    border-color: #8E240D;
}

.btn-danger:focus-visible {
    box-shadow: var(--btn-focus-danger);
}


/* ── Danger Outline ─────────────────────────────────────────── */
.btn-danger-outline {
    background: transparent;
    color: var(--color-error, #C13515);
    border-color: var(--color-error, #C13515);
}

.btn-danger-outline:hover:not(:disabled):not([aria-disabled="true"]) {
    background: rgba(193, 53, 21, 0.06);
}

.btn-danger-outline:active:not(:disabled):not([aria-disabled="true"]) {
    background: rgba(193, 53, 21, 0.12);
}

.btn-danger-outline:focus-visible {
    box-shadow: var(--btn-focus-danger);
}


/* ── White / Light surface (for dark hero sections) ─────────── */
.btn-white {
    background: #ffffff;
    color: var(--color-text-primary, #222222);
    border-color: #ffffff;
    box-shadow: var(--btn-shadow-md);
}

.btn-white:hover:not(:disabled):not([aria-disabled="true"]) {
    background: #f0f0f0;
    border-color: #f0f0f0;
    box-shadow: var(--btn-shadow-hover);
}

.btn-white:active:not(:disabled):not([aria-disabled="true"]) {
    background: #e4e4e4;
}

.btn-white:focus-visible {
    box-shadow: 0 0 0 3px rgba(255, 255, 255, 0.50);
}


/* ── Link style ─────────────────────────────────────────────── */
.btn-link {
    background: transparent;
    color: var(--color-text-link, #222222);
    border-color: transparent;
    text-decoration: underline;
    text-underline-offset: 3px;
    padding-left: 0;
    padding-right: 0;
    height: auto;
}

.btn-link:hover:not(:disabled):not([aria-disabled="true"]) {
    color: var(--color-primary, #FF385C);
}

.btn-link:focus-visible {
    box-shadow: var(--btn-focus-dark);
    border-radius: 4px;
}


/* ============================================================
     SIZES
     ============================================================ */
.btn-xs {
    height: var(--btn-h-xs);
    padding: 0 var(--btn-px-xs);
    font-size: var(--btn-fs-xs);
    border-radius: var(--btn-radius-sm);
    gap: 4px;
}

.btn-sm {
    height: var(--btn-h-sm);
    padding: 0 var(--btn-px-sm);
    font-size: var(--btn-fs-sm);
    gap: 6px;
}

/* md is the default — no extra class needed */

.btn-lg {
    height: var(--btn-h-lg);
    padding: 0 var(--btn-px-lg);
    font-size: var(--btn-fs-lg);
}

.btn-xl {
    height: var(--btn-h-xl);
    padding: 0 var(--btn-px-xl);
    font-size: var(--btn-fs-xl);
}


/* ============================================================
     SHAPE MODIFIERS
     ============================================================ */
/* Square radius (for card/form contexts) */
.btn-rounded {
    border-radius: var(--btn-radius-md);
}

/* Icon-only square/circle button */
.btn-icon-only {
    padding: 0;
    width: var(--btn-h-md);
    flex-shrink: 0;
}

.btn-xs.btn-icon-only {
    width: var(--btn-h-xs);
}

.btn-sm.btn-icon-only {
    width: var(--btn-h-sm);
}

.btn-lg.btn-icon-only {
    width: var(--btn-h-lg);
}

.btn-xl.btn-icon-only {
    width: var(--btn-h-xl);
}

/* Full width */
.btn-block {
    width: 100%;
}


/* ============================================================
     STATES
     ============================================================ */

/* ── Disabled ────────────────────────────────────────────────── */
.btn:disabled,
.btn[aria-disabled="true"] {
    background: var(--color-surface-disabled, #F5F5F5);
    color: var(--color-text-disabled, #B0B0B0);
    border-color: var(--color-border-disabled, #E0E0E0);
    box-shadow: none;
    cursor: not-allowed;
    pointer-events: none;
    transform: none;
}

/* Primary disabled — keep brand shape but muted */
.btn-primary:disabled,
.btn-primary[aria-disabled="true"] {
    background: rgba(255, 56, 92, 0.35);
    border-color: transparent;
    color: rgba(255, 255, 255, 0.75);
}

.btn-secondary:disabled,
.btn-secondary[aria-disabled="true"] {
    background: rgba(34, 34, 34, 0.30);
    border-color: transparent;
    color: rgba(255, 255, 255, 0.60);
}


/* ── Loading state ──────────────────────────────────────────── */
.btn[data-loading="true"] {
    cursor: wait;
    pointer-events: none;
    opacity: 0.80;
}

/* Hide label text when loading (screen-reader text stays) */
.btn[data-loading="true"] .btn-label {
    opacity: 0;
    position: absolute;
}


/* ── Toggle / Selected ──────────────────────────────────────── */
.btn-toggle {
    background: transparent;
    color: var(--color-text-secondary, #717171);
    border-color: var(--color-border, #DDDDDD);
}

.btn-toggle:hover:not(:disabled) {
    border-color: var(--color-border-dark, #B0B0B0);
    color: var(--color-text-primary, #222222);
}

.btn-toggle.is-selected,
.btn-toggle[aria-pressed="true"] {
    background: var(--color-secondary, #222222);
    color: #ffffff;
    border-color: var(--color-secondary, #222222);
}

.btn-toggle.is-selected:hover,
.btn-toggle[aria-pressed="true"]:hover {
    background: #3a3a3a;
    border-color: #3a3a3a;
}

.btn-toggle:focus-visible {
    box-shadow: var(--btn-focus-dark);
}


/* ============================================================
     BUTTON GROUP
     ============================================================ */
.btn-group {
    display: inline-flex;
    flex-wrap: wrap;
    gap: 8px;
    align-items: center;
}

.btn-group-attached {
    display: inline-flex;
    gap: 0;
    align-items: stretch;
}

.btn-group-attached .btn {
    border-radius: 0;
    border-right-width: 0;
}

.btn-group-attached .btn:first-child {
    border-radius: var(--btn-radius-pill) 0 0 var(--btn-radius-pill);
}

.btn-group-attached .btn:last-child {
    border-radius: 0 var(--btn-radius-pill) var(--btn-radius-pill) 0;
    border-right-width: 1.5px;
}

.btn-group-attached .btn:only-child {
    border-radius: var(--btn-radius-pill);
    border-right-width: 1.5px;
}


/* ============================================================
     BADGE INSIDE BUTTON  (e.g. cart count)
     ============================================================ */
.btn-badge {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 18px;
    height: 18px;
    padding: 0 5px;
    border-radius: 999px;
    font-size: 11px;
    font-weight: 700;
    line-height: 1;
    background: rgba(0, 0, 0, 0.18);
    color: inherit;
}

.btn-primary .btn-badge {
    background: rgba(0, 0, 0, 0.20);
    color: #fff;
}


/* ============================================================
     RESPONSIVE SIZING
     Automatically scale down on small screens
     ============================================================ */
@media (max-width: 480px) {

    /* xl → lg on mobile */
    .btn-xl {
        height: var(--btn-h-lg);
        padding: 0 var(--btn-px-lg);
        font-size: var(--btn-fs-lg);
    }

    /* lg → md on mobile */
    .btn-lg {
        height: var(--btn-h-md);
        padding: 0 var(--btn-px-md);
        font-size: var(--btn-fs-md);
    }

    /* Reduce gap slightly */
    .btn {
        gap: 6px;
    }
}

@media (max-width: 360px) {

    /* md → sm on very small phones */
    .btn:not(.btn-xs):not(.btn-sm):not(.btn-lg):not(.btn-xl) {
        height: var(--btn-h-sm);
        padding: 0 var(--btn-px-sm);
        font-size: var(--btn-fs-sm);
    }
}


/* ============================================================
     REDUCED MOTION
     ============================================================ */
@media (prefers-reduced-motion: reduce) {
    .btn {
        transition: none;
    }

    .btn:active:not(:disabled) {
        transform: none;
    }

    .btn .btn-spinner {
        animation: none;
        opacity: 0.6;
    }
}