/* ============================================================
   Mercury CSS — Foundation
   All colors via CSS custom properties. Zero hardcoded brand colors.
   ============================================================ */

/* === Reset === */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { font-size: 14px; line-height: 1.5; -webkit-text-size-adjust: 100%; }
body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    color: var(--brand-text, #1A1A2E);
    background: var(--brand-bg, #F5F6F8);
    min-height: 100vh;
}
a { color: var(--brand-accent, #3B82F6); text-decoration: none; }
a:hover { text-decoration: underline; }
img { max-width: 100%; height: auto; }
hr { border: none; border-top: 1px solid var(--color-border); margin: 1.5rem 0; }

/* === Typography === */
h1 { font-size: 1.714rem; font-weight: 700; line-height: 1.3; margin-bottom: 0.5rem; }
h2 { font-size: 1.429rem; font-weight: 600; line-height: 1.3; margin-bottom: 0.5rem; }
h3 { font-size: 1.143rem; font-weight: 600; line-height: 1.4; margin-bottom: 0.25rem; }
.text-secondary { color: var(--color-text-secondary); }
.text-muted { color: var(--color-text-muted); }
.text-small { font-size: 0.857rem; }

/* === Layout === */
.main {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem 1.5rem;
}

/* === Header === */
.header {
    background: var(--brand-primary);
    color: #fff;
    position: sticky;
    top: 0;
    z-index: 100;
}
.header-inner {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1.5rem;
    display: flex;
    align-items: center;
    height: 56px;
    gap: 2rem;
}
.header-logo img {
    height: 32px;
    display: block;
}
.header-nav {
    display: flex;
    gap: 0.25rem;
    flex: 1;
}
.header-nav a {
    color: rgba(255,255,255,0.75);
    padding: 0.5rem 0.75rem;
    border-radius: 6px;
    font-size: 0.929rem;
    font-weight: 500;
    text-decoration: none;
    transition: background 0.15s, color 0.15s;
}
.header-nav a:hover,
.header-nav a.nav-active {
    color: #fff;
    background: rgba(255,255,255,0.15);
    text-decoration: none;
}
.header-right {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

/* === User Menu === */
.user-menu { position: relative; }
.user-menu-btn {
    background: rgba(255,255,255,0.15);
    border: none;
    color: #fff;
    padding: 0.375rem 0.75rem;
    border-radius: 6px;
    cursor: pointer;
    font-size: 0.857rem;
    font-weight: 500;
}
.user-menu-btn:hover { background: rgba(255,255,255,0.25); }
.user-menu-dropdown {
    display: none;
    position: absolute;
    right: 0;
    top: calc(100% + 4px);
    background: var(--brand-surface);
    border: 1px solid var(--color-border);
    border-radius: 8px;
    box-shadow: 0 4px 16px rgba(0,0,0,0.12);
    min-width: 160px;
    z-index: 200;
}
.user-menu-dropdown.open { display: block; }
.user-menu-dropdown a {
    display: block;
    padding: 0.625rem 1rem;
    color: var(--brand-text);
    font-size: 0.929rem;
    text-decoration: none;
}
.user-menu-dropdown a:hover {
    background: var(--brand-bg);
    text-decoration: none;
}

/* === Hamburger (mobile) === */
.hamburger {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
    flex-direction: column;
    gap: 4px;
}
.hamburger span {
    display: block;
    width: 20px;
    height: 2px;
    background: #fff;
    border-radius: 1px;
}

/* === Footer === */
.footer {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem 1.5rem;
    border-top: 1px solid var(--color-border);
    font-size: 0.857rem;
    color: var(--color-text-muted);
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
}
.footer a { color: var(--color-text-secondary); }

/* === Public Pages (login, register, etc.) === */
.public-body {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    padding: 2rem;
}
.public-wrapper {
    width: 100%;
    max-width: 420px;
}
.public-logo {
    text-align: center;
    margin-bottom: 2rem;
}
.public-logo img {
    height: 40px;
}
.public-tagline {
    color: var(--color-text-secondary);
    font-size: 0.929rem;
    margin-top: 0.5rem;
}
.public-card {
    background: var(--brand-surface);
    border: 1px solid var(--color-border);
    border-radius: 12px;
    padding: 2rem;
}
.public-card h2 {
    text-align: center;
    margin-bottom: 1.5rem;
}

/* === Cards === */
.card {
    background: var(--brand-surface);
    border: 1px solid var(--color-border);
    border-radius: 8px;
    padding: 1.5rem;
}
.card:hover { box-shadow: 0 2px 8px rgba(0,0,0,0.06); }
.card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 1.5rem;
}

/* === Buttons === */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.625rem 1.25rem;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 500;
    border: 1px solid transparent;
    cursor: pointer;
    min-height: 44px;
    text-decoration: none;
    transition: background 0.15s, border-color 0.15s, opacity 0.15s;
    line-height: 1;
}
.btn:hover { text-decoration: none; }
.btn:disabled, .btn.disabled {
    opacity: 0.5;
    cursor: not-allowed;
    pointer-events: none;
}
.btn:focus-visible {
    outline: 2px solid var(--brand-accent);
    outline-offset: 2px;
}
.btn-primary {
    background: var(--brand-accent);
    color: #fff;
}
.btn-primary:hover { opacity: 0.9; }
.btn-secondary {
    background: transparent;
    color: var(--brand-accent);
    border-color: var(--brand-accent);
}
.btn-secondary:hover { background: var(--brand-bg); }
.btn-danger {
    background: var(--color-danger);
    color: #fff;
}
.btn-danger:hover { opacity: 0.9; }
.btn-ghost {
    background: transparent;
    color: var(--brand-accent);
    border: none;
    padding: 0.5rem;
}
.btn-ghost:hover { text-decoration: underline; }
.btn-full { width: 100%; }
.btn-sm { min-height: 36px; padding: 0.375rem 0.75rem; font-size: 0.857rem; }

/* === Forms === */
.form-stack { display: flex; flex-direction: column; gap: 1.25rem; }
.form-group { display: flex; flex-direction: column; gap: 0.25rem; }
.form-group label {
    font-size: 0.929rem;
    font-weight: 500;
    color: var(--brand-text);
}
.form-group input[type="text"],
.form-group input[type="email"],
.form-group input[type="password"],
.form-group input[type="tel"],
.form-group input[type="url"],
.form-group input[type="number"],
.form-group input[type="date"],
.form-group select,
.form-group textarea {
    height: 44px;
    padding: 0 0.75rem;
    border: 1px solid var(--color-border);
    border-radius: 6px;
    font-size: 1rem;
    font-family: inherit;
    color: var(--brand-text);
    background: var(--brand-surface);
    transition: border-color 0.15s;
}
.form-group textarea { height: auto; min-height: 80px; padding: 0.75rem; resize: vertical; }
.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--brand-accent);
    box-shadow: 0 0 0 3px rgba(59,130,246,0.1);
}
.form-group input::placeholder { color: var(--color-text-muted); }
.form-row { flex-direction: row; align-items: center; gap: 0.5rem; }
.form-links {
    text-align: center;
    font-size: 0.929rem;
    color: var(--color-text-secondary);
}
.form-links a { font-weight: 500; }
.form-divider { margin: 0.5rem 0; }
.form-error {
    font-size: 0.857rem;
    color: var(--color-danger);
}

/* Checkbox */
.checkbox-label {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.929rem;
    cursor: pointer;
}
.checkbox-label input[type="checkbox"] { width: 16px; height: 16px; cursor: pointer; }

/* Password toggle */
.input-with-toggle { position: relative; }
.input-with-toggle input { width: 100%; padding-right: 3rem; }
.toggle-password {
    position: absolute;
    right: 0.75rem;
    top: 50%;
    transform: translateY(-50%);
    background: none;
    border: none;
    cursor: pointer;
    color: var(--color-text-muted);
    padding: 0.25rem;
}
.toggle-password:hover { color: var(--brand-text); }

/* === Flash Messages === */
.flash, .alert {
    padding: 0.75rem 1rem;
    border-radius: 8px;
    font-size: 0.929rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 0.75rem;
    margin-bottom: 1rem;
}
.flash-success, .alert-success { background: #D1FAE5; color: #065F46; border: 1px solid #A7F3D0; }
.flash-error, .alert-error     { background: #FEE2E2; color: #991B1B; border: 1px solid #FECACA; }
.flash-warn, .alert-warn       { background: #FEF3C7; color: #92400E; border: 1px solid #FDE68A; }
.flash-info, .alert-info       { background: #DBEAFE; color: #1E40AF; border: 1px solid #BFDBFE; }
.flash-close {
    background: none;
    border: none;
    font-size: 1.25rem;
    cursor: pointer;
    color: inherit;
    opacity: 0.6;
    padding: 0 0.25rem;
    line-height: 1;
}
.flash-close:hover { opacity: 1; }

/* === Status Badges === */
.badge {
    display: inline-flex;
    align-items: center;
    padding: 0.125rem 0.5rem;
    border-radius: 9999px;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.025em;
}
.badge-pending    { background: #FEF3C7; color: #92400E; }
.badge-confirmed  { background: #DBEAFE; color: #1E40AF; }
.badge-production { background: #E0E7FF; color: #3730A3; }
.badge-shipped    { background: #CFFAFE; color: #155E75; }
.badge-delivered  { background: #D1FAE5; color: #065F46; }
.badge-paid       { background: #D1FAE5; color: #065F46; }
.badge-partial    { background: #FEF3C7; color: #92400E; }
.badge-overdue    { background: #FEE2E2; color: #991B1B; }
.badge-cancelled  { background: #F3F4F6; color: #6B7280; }
.badge-draft      { background: #F3F4F6; color: #6B7280; }

/* === Dashboard === */
.dashboard { }
.dashboard h1 { margin-bottom: 0.25rem; }
.dashboard-actions {
    display: flex;
    gap: 1rem;
    margin-top: 2rem;
}

/* === Registration Layout === */
.register-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
}
.register-col h3 {
    margin-bottom: 1rem;
    padding-bottom: 0.5rem;
    border-bottom: 1px solid var(--color-border);
}
.form-row-2col {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
}
.required { color: var(--color-danger); }

/* Password Checks */
.password-checks {
    display: flex;
    flex-direction: column;
    gap: 0.125rem;
    margin-top: 0.5rem;
    font-size: 0.786rem;
}
.pw-check { color: var(--color-text-muted); }
.pw-check::before { content: '○ '; }
.pw-check.pw-pass { color: var(--color-success); }
.pw-check.pw-pass::before { content: '✓ '; }
.pw-check.pw-fail { color: var(--color-danger); }
.pw-check.pw-fail::before { content: '✗ '; }

/* Strength Meter */
.strength-meter {
    height: 4px;
    background: var(--color-border);
    border-radius: 2px;
    margin-top: 0.5rem;
    overflow: hidden;
}
.strength-bar {
    height: 100%;
    width: 0;
    border-radius: 2px;
    transition: width 0.3s, background 0.3s;
}
.strength-weak { background: var(--color-danger); }
.strength-fair { background: var(--color-warning); }
.strength-good { background: var(--color-success); }
.strength-strong { background: #059669; }

/* Password Match */
.pw-match-ok { color: var(--color-success); }
.pw-match-fail { color: var(--color-danger); }

/* Invite Details */
.invite-details {
    background: var(--brand-bg);
    padding: 1rem;
    border-radius: 8px;
    margin: 1rem 0;
}

/* Verify Email */
.verify-email { text-align: center; }
.verify-email h2 { margin-bottom: 1rem; }
.verify-email p { margin-bottom: 0.75rem; }

/* Wide public card for registration */
.public-wrapper.wide { max-width: 900px; }

@media (max-width: 768px) {
    .register-grid { grid-template-columns: 1fr; }
    .form-row-2col { grid-template-columns: 1fr; }
}

/* === Error Page === */
.error-page {
    text-align: center;
    padding: 4rem 2rem;
}
.error-page h1 {
    font-size: 4rem;
    color: var(--color-text-muted);
    margin-bottom: 1rem;
}

/* === Tables === */
.table-wrap { overflow-x: auto; }
table {
    width: 100%;
    border-collapse: collapse;
}
th {
    background: #F9FAFB;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--color-text-secondary);
    text-align: left;
    padding: 0.75rem 1rem;
    border-bottom: 1px solid var(--color-border);
}
td {
    padding: 0.75rem 1rem;
    border-bottom: 1px solid var(--color-border);
    font-size: 0.929rem;
}
tr:hover td { background: #F0F4FF; }
tr.clickable { cursor: pointer; }

/* === Responsive === */
@media (max-width: 768px) {
    .header-nav { display: none; }
    .header-nav.open {
        display: flex;
        flex-direction: column;
        position: absolute;
        top: 56px;
        left: 0;
        right: 0;
        background: var(--brand-primary);
        padding: 0.5rem;
        border-bottom: 1px solid rgba(255,255,255,0.1);
    }
    .hamburger { display: flex; }
    .user-menu-btn .user-avatar { display: none; }
    .main { padding: 1.5rem 1rem; }
    .dashboard-actions { flex-direction: column; }
    .dashboard-actions .btn { width: 100%; }
    .card-grid { grid-template-columns: 1fr; }
}

/* === RTL === */
[dir="rtl"] .header-inner { flex-direction: row-reverse; }
[dir="rtl"] .header-nav { flex-direction: row-reverse; }
[dir="rtl"] .form-row { flex-direction: row-reverse; }
[dir="rtl"] .user-menu-dropdown { right: auto; left: 0; }

/* === Print === */
@media print {
    .header, .footer, .btn, .hamburger, .flash, .alert { display: none !important; }
    .main { max-width: 100%; padding: 0; }
    body { background: #fff; }
}