/* EstateSaleUSA — Core Styles */
:root {
    --primary: #2563eb;
    --primary-dark: #1d4ed8;
    --accent: #10b981;
    --accent-dark: #059669;
    --text: #1f2937;
    --text-light: #6b7280;
    --bg: #f9fafb;
    --white: #ffffff;
    --border: #e5e7eb;
    --radius: 8px;
    --shadow: 0 1px 3px rgba(0,0,0,.1);
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
    color: var(--text);
    background: var(--bg);
    line-height: 1.6;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

main { flex: 1; }
img { max-width: 100%; height: auto; }
a { color: var(--primary); text-decoration: none; }
a:hover { text-decoration: underline; }

/* Container */
.container { width: 100%; max-width: 1280px; margin: 0 auto; padding: 0 1rem; }

/* Header */
.site-header { background: var(--white); border-bottom: 1px solid var(--border); position: sticky; top: 0; z-index: 100; }
.nav-wrap { display: flex; align-items: center; justify-content: space-between; height: 64px; }
.logo { font-size: 1.4rem; font-weight: 800; color: var(--text); text-decoration: none; }
.logo span { color: var(--primary); }
.nav-menu { display: flex; align-items: center; gap: 1.5rem; }
.nav-menu a { color: var(--text); font-weight: 500; text-decoration: none; }
.nav-menu a:hover { color: var(--primary); }

/* Hamburger */
.hamburger { display: none; background: none; border: none; cursor: pointer; flex-direction: column; gap: 5px; padding: 4px; }
.hamburger span { display: block; width: 24px; height: 2px; background: var(--text); transition: .3s; }

/* Buttons */
.btn { display: inline-block; padding: .6rem 1.2rem; border-radius: var(--radius); font-weight: 600; font-size: .95rem; border: none; cursor: pointer; text-align: center; text-decoration: none; transition: background .2s; }
.btn-primary { background: var(--primary); color: var(--white); }
.btn-primary:hover { background: var(--primary-dark); text-decoration: none; }
.btn-accent { background: var(--accent); color: var(--white); }
.btn-accent:hover { background: var(--accent-dark); text-decoration: none; }
.btn-outline { background: transparent; border: 2px solid var(--primary); color: var(--primary); }

/* Grid */
.grid { display: grid; gap: 1.5rem; }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

/* Card */
.card { background: var(--white); border: 1px solid var(--border); border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow); }
.card-body { padding: 1.25rem; }
.card-img { width: 100%; aspect-ratio: 16/10; object-fit: cover; }

/* Forms */
input, select, textarea {
    width: 100%;
    padding: .6rem .8rem;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    font-size: 1rem;
    font-family: inherit;
    color: var(--text);
    background: var(--white);
}
input:focus, select:focus, textarea:focus { outline: none; border-color: var(--primary); box-shadow: 0 0 0 3px rgba(37,99,235,.15); }
label { display: block; margin-bottom: .4rem; font-weight: 500; font-size: .9rem; }
.form-group { margin-bottom: 1rem; }

/* Footer */
.site-footer { background: var(--text); color: #d1d5db; padding: 3rem 0 1.5rem; margin-top: 3rem; }
.footer-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 2rem; }
.footer-col h4 { color: var(--white); margin-bottom: .75rem; font-size: 1rem; }
.footer-col a { display: block; color: #9ca3af; margin-bottom: .4rem; text-decoration: none; }
.footer-col a:hover { color: var(--white); }
.footer-col p { font-size: .9rem; color: #9ca3af; }
.footer-bottom { text-align: center; padding-top: 2rem; margin-top: 2rem; border-top: 1px solid #374151; font-size: .85rem; }

/* Utilities */
.text-center { text-align: center; }
.mt-1 { margin-top: .5rem; } .mt-2 { margin-top: 1rem; } .mt-3 { margin-top: 1.5rem; } .mt-4 { margin-top: 2rem; }
.mb-1 { margin-bottom: .5rem; } .mb-2 { margin-bottom: 1rem; } .mb-3 { margin-bottom: 1.5rem; }
.py-4 { padding-top: 2rem; padding-bottom: 2rem; }

/* Flash messages */
.flash { padding: .75rem 1rem; border-radius: var(--radius); margin-bottom: 1rem; font-weight: 500; }
.flash-success { background: #d1fae5; color: #065f46; }
.flash-error { background: #fee2e2; color: #991b1b; }

/* Responsive */
@media (max-width: 1024px) {
    .grid-4 { grid-template-columns: repeat(2, 1fr); }
    .footer-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
    .grid-3 { grid-template-columns: repeat(2, 1fr); }
    .hamburger { display: flex; }
    .nav-menu { display: none; position: absolute; top: 64px; left: 0; right: 0; background: var(--white); flex-direction: column; padding: 1rem; border-bottom: 1px solid var(--border); box-shadow: var(--shadow); }
    .nav-menu.open { display: flex; }
}

@media (max-width: 640px) {
    .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
    .footer-grid { grid-template-columns: 1fr; }
}