/* ============================================================
   AddressForm — Stylesheet
   All classes are namespaced with "af-" to avoid conflicts.
   CSS custom properties allow per-page theming.
   ============================================================ */

/* ── Design tokens ─────────────────────────────────────────── */
:root {
    --af-font-sans: 'DM Sans', 'Segoe UI', system-ui, sans-serif;
    --af-font-mono: 'DM Mono', 'Fira Mono', monospace;
    /* Surface */
    --af-bg: #ffffff;
    --af-surface: #f7f6f3;
    --af-border: #d8d5ce;
    --af-border-focus: #1a1a1a;
    --af-border-error: #c0392b;
    --af-border-radius: 6px;
    /* Text */
    --af-text-primary: #1a1a1a;
    --af-text-secondary: #6b6560;
    --af-text-placeholder: #a09b95;
    --af-text-error: #c0392b;
    --af-text-required: #c0392b;
    /* Input */
    --af-input-bg: #ffffff;
    --af-input-bg-focus: #ffffff;
    --af-input-height: 44px;
    --af-input-padding: 0 14px;
    --af-input-font-size: 14px; /* 15px */
    /* Label */
    --af-label-font-size: 15px; /* 12px */
    --af-label-weight: 600;
    --af-label-spacing: 0.07em;
    /* Button */
    --af-btn-bg: #1a1a1a;
    --af-btn-bg-hover: #333333;
    --af-btn-text: #ffffff;
    --af-btn-radius: 6px;
    --af-btn-height: 48px;
    --af-btn-font-size: 0.9375rem;
    --af-btn-weight: 600;
    /* Title */
    --af-title-font-size: 1.5rem;
    --af-title-weight: 700;
    /* Error */
    --af-error-font-size: 0.72rem;
    /* Spacing */
    --af-gap: 16px;
    --af-field-gap: 6px;
}

/* ── Form wrapper ───────────────────────────────────────────── */
.af-form {
    font-family: var(--af-font-sans);
    background: var(--af-bg);
    color: var(--af-text-primary);
    box-sizing: border-box;
}

    .af-form *,
    .af-form *::before,
    .af-form *::after {
        box-sizing: inherit;
    }

/* ── Header ─────────────────────────────────────────────────── */
.af-header {
    margin-bottom: 20px;
    padding-bottom: 14px;
    border-bottom: 1.5px solid var(--af-border);
}

.af-title {
    margin: 0;
    font-size: var(--af-title-font-size);
    font-weight: var(--af-title-weight);
    letter-spacing: -0.01em;
    color: var(--af-text-primary);
}

/* ── Fields container ───────────────────────────────────────── */
.af-fields {
    display: flex;
    flex-direction: column;
    gap: var(--af-gap);
}

/* ── Row layouts ────────────────────────────────────────────── */
.af-row {
    display: grid;
    gap: var(--af-gap);
}

.af-row--1col {
    grid-template-columns: 1fr;
}

.af-row--2col {
    grid-template-columns: 1fr 1fr;
}

@media (max-width: 520px) {
    .af-row--2col {
        grid-template-columns: 1fr;
    }
}

/* ── Individual field ───────────────────────────────────────── */
.af-field {
    display: flex;
    flex-direction: column;
    gap: var(--af-field-gap);
}

/* ── Label ──────────────────────────────────────────────────── */
.af-label {
    display: flex;
    align-items: center;
    gap: 3px;
    font-size: var(--af-label-font-size);
    font-weight: var(--af-label-weight);
    letter-spacing: var(--af-label-spacing);
    text-transform: uppercase;
    color: var(--af-text-secondary);
    user-select: none;
}

.af-required {
    color: var(--af-text-required);
    font-size: 0.65rem;
    line-height: 1;
    margin-top: 1px;
}

/* ── Input & Select ─────────────────────────────────────────── */
.af-input {
    width: 100%;
    height: var(--af-input-height);
    padding: var(--af-input-padding);
    font-family: var(--af-font-sans);
    font-size: var(--af-input-font-size);
    color: var(--af-text-primary);
    background: var(--af-input-bg);
    border: 1.5px solid var(--af-border);
    border-radius: var(--af-border-radius);
    outline: none;
    transition: border-color 0.15s ease, box-shadow 0.15s ease, background 0.15s ease;
    -webkit-appearance: none;
    appearance: none;
}

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

    .af-input:hover:not(:disabled) {
        border-color: #b5b0aa;
    }

    .af-input:focus {
        border-color: var(--af-border-focus);
        background: var(--af-input-bg-focus);
        box-shadow: 0 0 0 3px rgba(26, 26, 26, 0.08);
    }

    .af-input:disabled {
        opacity: 0.5;
        cursor: not-allowed;
        background: var(--af-surface);
    }

/* Select — custom arrow */
.af-select {
    cursor: pointer;
    padding-right: 36px;
    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='%236b6560' stroke-width='1.5' fill='none' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 12px center;
    background-size: 12px 8px;
}

/* ── Error state ────────────────────────────────────────────── */
.af-field--error .af-input {
    border-color: var(--af-border-error);
    box-shadow: 0 0 0 3px rgba(192, 57, 43, 0.1);
}

.af-field--error .af-label {
    color: var(--af-text-error);
}

.af-error {
    font-size: var(--af-error-font-size);
    color: var(--af-text-error);
    font-weight: 500;
    min-height: 1em;
    letter-spacing: 0.01em;
}

/* ── Actions / Submit button ────────────────────────────────── */
.af-actions {
    margin-top: 24px;
}

.af-submit {
    width: 100%;
    height: var(--af-btn-height);
    padding: 0 24px;
    font-family: var(--af-font-sans);
    font-size: var(--af-btn-font-size);
    font-weight: var(--af-btn-weight);
    letter-spacing: 0.02em;
    color: var(--af-btn-text);
    background: var(--af-btn-bg);
    border: none;
    border-radius: var(--af-btn-radius);
    cursor: pointer;
    transition: background 0.15s ease, transform 0.1s ease, box-shadow 0.15s ease;
}

    .af-submit:hover {
        background: var(--af-btn-bg-hover);
        box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
    }

    .af-submit:active {
        transform: translateY(1px);
        box-shadow: none;
    }

    .af-submit:focus-visible {
        outline: 2px solid var(--af-border-focus);
        outline-offset: 3px;
    }

/* ============================================================
   Optional: Dark theme
   Apply class="af-dark" to any ancestor element.
   ============================================================ */
.af-dark {
    --af-bg: #1c1c1e;
    --af-surface: #2c2c2e;
    --af-border: #3a3a3c;
    --af-border-focus: #f5f5f0;
    --af-text-primary: #f5f5f0;
    --af-text-secondary: #8e8e93;
    --af-text-placeholder: #636366;
    --af-input-bg: #2c2c2e;
    --af-input-bg-focus: #3a3a3c;
    --af-btn-bg: #f5f5f0;
    --af-btn-bg-hover: #ffffff;
    --af-btn-text: #1c1c1e;
}