/* ============================================================================
   InvoiceMe — Stylesheet. Mobile-first, no frameworks.
   ========================================================================= */

:root {
    --color-primary: #2563EB;
    --color-primary-dark: #1D4ED8;
    --color-primary-light: #EFF6FF;
    --color-accent: #059669;
    --color-accent-light: #ECFDF5;

    --color-bg: #F8FAFC;
    --color-surface: #FFFFFF;
    --color-text: #0F172A;
    --color-text-muted: #64748B;
    --color-border: #E2E8F0;

    --color-success: #059669;
    --color-warning: #D97706;
    --color-danger: #DC2626;

    --font-body: 'Inter', system-ui, sans-serif;

    --radius-sm: 8px;
    --radius-md: 16px;
    --radius-pill: 999px;

    --shadow-sm: 0 1px 3px rgba(15, 23, 42, 0.06);
    --shadow-md: 0 2px 10px rgba(15, 23, 42, 0.08);
    --shadow-lg: 0 12px 32px rgba(15, 23, 42, 0.14);

    --header-height: 64px;
    --container-width: 1100px;
    --transition-fast: 150ms ease;
}

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
    margin: 0;
    background: var(--color-bg);
    color: var(--color-text);
    font-family: var(--font-body);
    font-size: 16px;
    line-height: 1.55;
    -webkit-font-smoothing: antialiased;
}
img, svg { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button { font: inherit; cursor: pointer; }
ul { list-style: none; margin: 0; padding: 0; }

.skip-link { position: absolute; left: -9999px; top: 0; background: var(--color-primary); color: #fff; padding: 0.75rem 1.25rem; border-radius: 0 0 8px 0; z-index: 1000; }
.skip-link:focus { left: 0; }
:focus-visible { outline: 2px solid var(--color-primary); outline-offset: 2px; }

@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after { animation-duration: 0.001ms !important; transition-duration: 0.001ms !important; }
    html { scroll-behavior: auto; }
}

h1, h2, h3 { font-weight: 800; line-height: 1.2; margin: 0 0 0.5em; letter-spacing: -0.01em; }
h1 { font-size: clamp(1.75rem, 4vw, 2.5rem); }
h2 { font-size: clamp(1.25rem, 3vw, 1.5rem); }
h3 { font-size: 1.0625rem; }
p { margin: 0 0 1em; color: var(--color-text-muted); }

.container { width: 100%; max-width: var(--container-width); margin: 0 auto; padding: 0 1.25rem; }
.section { padding: 2rem 0; }
.muted { color: var(--color-text-muted); }
.text-center { text-align: center; }

/* ---------------------------------------------------------------------- */
/* Header                                                                  */
/* ---------------------------------------------------------------------- */
.site-header { position: sticky; top: 0; z-index: 100; background: var(--color-surface); border-bottom: 1px solid var(--color-border); }
.site-header__inner { display: flex; align-items: center; gap: 1.5rem; height: var(--header-height); }
.site-logo { font-weight: 800; font-size: 1.25rem; color: var(--color-primary); flex-shrink: 0; }
.primary-nav { display: none; flex: 1; gap: 1.5rem; align-items: center; }
.primary-nav a { font-weight: 600; font-size: 0.9375rem; color: var(--color-text-muted); }
.primary-nav a:hover { color: var(--color-primary); }
.primary-nav--marketing { justify-content: flex-end; margin-left: auto; }

.site-header__actions { display: flex; align-items: center; gap: 0.75rem; margin-left: auto; }
.business-pill { padding: 0.4rem 0.9rem; border-radius: var(--radius-pill); background: var(--color-primary-light); color: var(--color-primary); font-weight: 600; font-size: 0.8125rem; max-width: 140px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }

.user-menu { position: relative; }
.user-menu__toggle { border: none; background: transparent; padding: 0; }
.user-avatar { width: 36px; height: 36px; border-radius: 50%; background: var(--color-primary); color: #fff; display: flex; align-items: center; justify-content: center; font-weight: 700; }
.user-menu__dropdown { position: absolute; top: calc(100% + 0.5rem); right: 0; background: var(--color-surface); border: 1px solid var(--color-border); border-radius: var(--radius-sm); box-shadow: var(--shadow-md); min-width: 200px; padding: 0.5rem; }
.user-menu__dropdown a, .user-menu__name { display: block; padding: 0.6rem 0.75rem; font-size: 0.875rem; border-radius: var(--radius-sm); }
.user-menu__name { font-weight: 700; color: var(--color-text-muted); font-size: 0.75rem; text-transform: uppercase; letter-spacing: 0.03em; }
.user-menu__dropdown a:hover { background: var(--color-primary-light); color: var(--color-primary); }

@media (min-width: 768px) {
    .primary-nav { display: flex; }
}

/* ---------------------------------------------------------------------- */
/* Buttons                                                                 */
/* ---------------------------------------------------------------------- */
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 0.5rem; padding: 0.7rem 1.5rem; border-radius: var(--radius-pill); font-weight: 700; font-size: 0.9375rem; border: none; cursor: pointer; }
.btn--primary { background: var(--color-primary); color: #fff; }
.btn--primary:hover { background: var(--color-primary-dark); }
.btn--ghost { background: transparent; color: var(--color-text); border: 1px solid var(--color-border); }
.btn--ghost:hover { border-color: var(--color-primary); color: var(--color-primary); }
.btn--google { background: #fff; color: var(--color-text); border: 1px solid var(--color-border); }
.btn--google:hover { border-color: var(--color-text-muted); }
.btn--sm { padding: 0.5rem 1.1rem; font-size: 0.875rem; }
.btn--lg { padding: 0.85rem 1.85rem; font-size: 1rem; }
.btn-block { width: 100%; }

/* ---------------------------------------------------------------------- */
/* Hero + feature grid                                                     */
/* ---------------------------------------------------------------------- */
.hero { padding: 3.5rem 0 3rem; text-align: center; background: linear-gradient(180deg, var(--color-primary-light) 0%, var(--color-bg) 100%); }
.hero__inner { max-width: 680px; margin: 0 auto; }
.hero__badge { display: inline-block; padding: 0.35rem 1rem; border-radius: var(--radius-pill); background: var(--color-accent-light); color: var(--color-accent); font-weight: 700; font-size: 0.8125rem; margin-bottom: 1rem; }
.hero__subtitle { font-size: 1.0625rem; margin-bottom: 1.75rem; }
.hero__actions { display: flex; flex-wrap: wrap; gap: 0.75rem; justify-content: center; }

.feature-grid { display: grid; grid-template-columns: 1fr; gap: 1.25rem; }
.feature-card { background: var(--color-surface); border: 1px solid var(--color-border); border-radius: var(--radius-md); padding: 1.5rem; box-shadow: var(--shadow-sm); }
.feature-card__icon { font-size: 1.75rem; display: block; margin-bottom: 0.75rem; }
.feature-card h3 { margin-bottom: 0.4rem; }
.feature-card p { margin: 0; font-size: 0.9375rem; }

@media (min-width: 640px) { .feature-grid { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 960px) { .feature-grid { grid-template-columns: repeat(3, 1fr); } }

/* ---------------------------------------------------------------------- */
/* Auth pages                                                              */
/* ---------------------------------------------------------------------- */
.auth-page { min-height: calc(100vh - var(--header-height)); display: flex; align-items: center; justify-content: center; padding: 2rem 1.25rem; }
.auth-card { width: 100%; max-width: 420px; background: var(--color-surface); border: 1px solid var(--color-border); border-radius: var(--radius-md); box-shadow: var(--shadow-md); padding: 2rem; }
.auth-card__logo { text-align: center; font-weight: 800; font-size: 1.375rem; color: var(--color-primary); margin-bottom: 0.25rem; }
.auth-card__subtitle { text-align: center; font-size: 0.875rem; margin-bottom: 1.5rem; }
.auth-card__footer { text-align: center; font-size: 0.875rem; margin: 1.25rem 0 0; }
.auth-card__footer a { color: var(--color-primary); font-weight: 600; }
.auth-divider { display: flex; align-items: center; gap: 0.75rem; margin: 1.25rem 0; color: var(--color-text-muted); font-size: 0.8125rem; }
.auth-divider::before, .auth-divider::after { content: ''; flex: 1; height: 1px; background: var(--color-border); }
.hp-field { position: absolute; left: -9999px; width: 1px; height: 1px; overflow: hidden; }

/* ---------------------------------------------------------------------- */
/* Forms                                                                   */
/* ---------------------------------------------------------------------- */
.form-group { margin-bottom: 1.1rem; }
.form-group label { display: block; font-size: 0.8125rem; font-weight: 700; margin-bottom: 0.4rem; }
.form-group input, .form-group select, .form-group textarea {
    width: 100%; padding: 0.65rem 0.9rem; border: 1px solid var(--color-border); border-radius: var(--radius-sm);
    background: var(--color-bg); color: var(--color-text); font-size: 0.9375rem; font-family: inherit;
}
.form-group input:focus, .form-group select:focus, .form-group textarea:focus { border-color: var(--color-primary); outline: none; }
.form-hint { font-size: 0.75rem; color: var(--color-text-muted); margin-top: 0.3rem; }
.form-row { display: grid; grid-template-columns: 1fr; gap: 0 1rem; }
.form-section-title { font-size: 0.9375rem; margin: 1.75rem 0 1rem; padding-top: 1rem; border-top: 1px solid var(--color-border); }
.form-actions { margin-top: 1.5rem; }
.form-card { max-width: 640px; }

@media (min-width: 640px) { .form-row { grid-template-columns: 1fr 1fr; } }

.panel { background: var(--color-surface); border: 1px solid var(--color-border); border-radius: var(--radius-md); padding: 1.5rem; box-shadow: var(--shadow-sm); margin-bottom: 1.25rem; }

.alert { padding: 0.75rem 1rem; border-radius: var(--radius-sm); font-size: 0.875rem; margin-bottom: 1.25rem; }
.alert--error { background: #FEF2F2; color: var(--color-danger); border: 1px solid #FCA5A5; }
.alert--success { background: var(--color-accent-light); color: var(--color-success); border: 1px solid #6EE7B7; }

/* ---------------------------------------------------------------------- */
/* Dashboard                                                               */
/* ---------------------------------------------------------------------- */
.dashboard-header { margin-bottom: 1.5rem; }
.stat-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1rem; margin-bottom: 1.5rem; }
.stat-card { background: var(--color-surface); border: 1px solid var(--color-border); border-radius: var(--radius-md); padding: 1.25rem; box-shadow: var(--shadow-sm); }
.stat-card__value { font-size: 1.75rem; font-weight: 800; margin: 0; }
.stat-card__label { font-size: 0.8125rem; color: var(--color-text-muted); margin: 0; }

.checklist__item { display: flex; align-items: center; gap: 0.6rem; padding: 0.5rem 0; border-bottom: 1px solid var(--color-border); font-size: 0.9rem; color: var(--color-text-muted); }
.checklist__item:last-child { border-bottom: none; }
.checklist__mark { width: 20px; height: 20px; border-radius: 50%; border: 1.5px solid var(--color-border); display: inline-flex; align-items: center; justify-content: center; flex-shrink: 0; font-size: 0.75rem; color: transparent; }
.checklist__item.is-done { color: var(--color-text); }
.checklist__item.is-done .checklist__mark { background: var(--color-success); border-color: var(--color-success); color: #fff; }

.business-list__item { display: flex; justify-content: space-between; align-items: center; padding: 0.9rem 1rem; border-bottom: 1px solid var(--color-border); }
.business-list__item:last-child { border-bottom: none; }
.business-list__item.is-active { background: var(--color-primary-light); }
.business-list__name { font-weight: 600; }

.badge { display: inline-block; padding: 0.2rem 0.6rem; border-radius: var(--radius-pill); font-size: 0.75rem; font-weight: 700; }
.badge--success { background: var(--color-accent-light); color: var(--color-success); }

.empty-state { text-align: center; padding: 3rem 1.5rem; background: var(--color-surface); border: 1px dashed var(--color-border); border-radius: var(--radius-md); }

.not-found { text-align: center; padding: 4rem 0; }
.not-found__code { font-size: 4rem; font-weight: 800; color: var(--color-primary); margin: 0; }

@media (min-width: 640px) { .stat-grid { grid-template-columns: repeat(4, 1fr); } }

/* ---------------------------------------------------------------------- */
/* Footer                                                                  */
/* ---------------------------------------------------------------------- */
.site-footer { border-top: 1px solid var(--color-border); margin-top: 2rem; }
.site-footer__inner { padding: 1.5rem 0; font-size: 0.8125rem; color: var(--color-text-muted); text-align: center; }

/* ---------------------------------------------------------------------- */
/* List pages (Customers, Products, ...)                                   */
/* ---------------------------------------------------------------------- */
.page-toolbar { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 1rem; margin-bottom: 1.25rem; }
.page-toolbar h1 { margin: 0; }

.search-bar { display: flex; gap: 0.5rem; margin-bottom: 1.25rem; max-width: 420px; }
.search-bar input { flex: 1; padding: 0.6rem 0.9rem; border: 1px solid var(--color-border); border-radius: var(--radius-sm); background: var(--color-surface); color: var(--color-text); font-size: 0.875rem; }

.panel--table { padding: 0; overflow-x: auto; }
.data-table { width: 100%; border-collapse: collapse; font-size: 0.875rem; min-width: 480px; }
.data-table th { text-align: left; font-size: 0.75rem; text-transform: uppercase; letter-spacing: 0.03em; color: var(--color-text-muted); padding: 0.9rem 1rem; border-bottom: 1px solid var(--color-border); }
.data-table td { padding: 0.8rem 1rem; border-bottom: 1px solid var(--color-border); vertical-align: middle; }
.data-table tbody tr:last-child td { border-bottom: none; }
.data-table tbody tr:hover { background: var(--color-bg); }
.data-table__actions { display: flex; gap: 0.5rem; white-space: nowrap; }
.data-table__actions form { display: contents; }

.btn--icon { background: none; border: none; padding: 0.3rem 0.6rem; border-radius: var(--radius-sm); font-size: 0.8125rem; font-weight: 600; color: var(--color-primary); cursor: pointer; }
.btn--icon:hover { background: var(--color-primary-light); }
.btn--icon-danger { color: var(--color-danger); }
.btn--icon-danger:hover { background: #FEF2F2; }

.pagination { display: flex; flex-wrap: wrap; gap: 0.35rem; margin-top: 1.25rem; }
.pagination a { display: inline-flex; align-items: center; justify-content: center; min-width: 36px; height: 36px; padding: 0 0.6rem; border-radius: var(--radius-sm); font-size: 0.875rem; font-weight: 600; border: 1px solid var(--color-border); color: var(--color-text-muted); }
.pagination a:hover { border-color: var(--color-primary); color: var(--color-primary); }
.pagination a.is-current { background: var(--color-primary); border-color: var(--color-primary); color: #fff; }

.quick-actions { display: flex; flex-wrap: wrap; gap: 0.75rem; }