:root {
    --pharmica-green: #00966b;
    --dark-green: #007a56;
    --dark-grey: #333333;
    --light-bg: #f4f7f6;
    --white: #ffffff;
    --border-color: #e0e0e0;
}

* { margin: 0; padding: 0; box-sizing: border-box; font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif; }
body { background-color: var(--light-bg); color: var(--dark-grey); line-height: 1.6; }

/* Promo Bar */
.promo-bar { background-color: var(--dark-grey); color: var(--white); text-align: center; padding: 10px; font-size: 13px; font-weight: bold; letter-spacing: 1px;}
.promo-bar span { color: #f1c40f; }

/* Header */
header { background: var(--white); border-bottom: 1px solid var(--border-color); position: sticky; top: 0; z-index: 1000; box-shadow: 0 2px 5px rgba(0,0,0,0.05); }
.header-top { display: flex; justify-content: space-between; align-items: center; padding: 15px 5%; max-width: 1400px; margin: 0 auto; flex-wrap: wrap; gap: 12px; }
.logo { font-size: 32px; font-weight: 900; color: var(--pharmica-green); text-decoration: none; letter-spacing: -1px; }

/* Search Bar */
.search-container { flex-grow: 1; flex-basis: 260px; max-width: 600px; margin: 0 40px; position: relative; }
.search-container input { width: 100%; padding: 12px 20px; border: 2px solid var(--pharmica-green); border-radius: 4px; font-size: 15px; outline: none; }
.search-container button { position: absolute; right: 0; top: 0; height: 100%; background: var(--pharmica-green); color: white; border: none; padding: 0 25px; cursor: pointer; font-weight: bold; border-radius: 0 4px 4px 0; }
.search-container button:hover { background: var(--dark-green); }

/* Navigation */
nav { background: var(--pharmica-green); }
.nav-links { display: flex; max-width: 1400px; margin: 0 auto; padding: 0 5%; list-style: none; overflow-x: auto; }
.nav-links li a { color: var(--white); text-decoration: none; padding: 15px 20px; display: block; font-weight: 600; font-size: 14px; white-space: nowrap; }
.nav-links li a:hover { background: var(--dark-green); }

/* Hero Section */
.hero { background: var(--white); padding: 50px 5%; text-align: center; border-bottom: 1px solid var(--border-color); }
.hero h1 { font-size: 38px; color: var(--pharmica-green); margin-bottom: 15px; }
.trust-strip { display: flex; justify-content: center; flex-wrap: wrap; gap: 30px; margin-top: 25px; font-size: 15px; font-weight: bold; color: #555; }

/* Layout Grids */
.container { max-width: 1400px; margin: 40px auto; padding: 0 5%; }
.az-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); gap: 15px; margin-top: 20px; }
.treatment-card { background: var(--white); border: 1px solid var(--border-color); padding: 18px 20px; display: flex; justify-content: space-between; align-items: center; gap: 12px; color: var(--dark-grey); border-radius: 6px; transition: all 0.2s ease; }
.treatment-card:hover { box-shadow: 0 4px 12px rgba(0,0,0,0.1); border-color: var(--pharmica-green); transform: translateY(-2px); }
.treatment-card span { background: #e8f5e9; color: var(--pharmica-green); padding: 5px 12px; border-radius: 20px; font-size: 12px; }
.quick-add-btn { background: var(--pharmica-green); color: white; border: none; padding: 9px 16px; border-radius: 6px; font-weight: bold; font-size: 13px; cursor: pointer; white-space: nowrap; transition: opacity 0.2s ease; }
.quick-add-btn:hover { opacity: 0.85; }

/* General UI */
.card { background: var(--white); border-radius: 8px; padding: 30px; box-shadow: 0 4px 15px rgba(0,0,0,0.03); border: 1px solid var(--border-color); }
.btn-primary { background: var(--pharmica-green); color: white; padding: 12px 25px; text-decoration: none; border-radius: 4px; font-weight: bold; border: none; cursor: pointer; display: inline-block; }
.btn-primary:hover { background: var(--dark-green); }
.auth-form { max-width: 450px; margin: 50px auto; display: flex; flex-direction: column; gap: 15px; }
.auth-form input { width: 100%; padding: 12px; border: 1px solid var(--border-color); border-radius: 4px; font-size: 15px; }

/* =========================================
   Responsive breakpoints
   Tablet: <= 1024px   Mobile: <= 600px
   ========================================= */

/* Tablet */
@media (max-width: 1024px) {
    .container { padding: 0 4%; }
    .az-grid { grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); }
    .header-top { padding: 12px 4%; }
    .search-container { margin: 0 20px; flex-basis: 220px; }
    .hero h1 { font-size: 32px; }
    .card { padding: 24px; }
}

/* Mobile */
@media (max-width: 600px) {
    .promo-bar { font-size: 11px; padding: 8px 6px; letter-spacing: 0.5px; }

    .header-top { flex-direction: column; align-items: stretch; gap: 10px; padding: 12px 4%; }
    .logo { text-align: center; font-size: 26px; }
    .search-container { margin: 0; max-width: 100%; order: 3; }
    .header-top > div[style*="display: flex"] { justify-content: center; flex-wrap: wrap; gap: 12px !important; }

    nav { overflow-x: auto; }
    .nav-links { padding: 0 4%; }
    .nav-links li a { padding: 12px 14px; font-size: 13px; }

    .hero { padding: 30px 4%; }
    .hero h1 { font-size: 26px; }
    .trust-strip { gap: 14px; font-size: 13px; }

    .container { padding: 0 4%; margin: 24px auto; }
    .az-grid { grid-template-columns: 1fr; gap: 12px; }

    .treatment-card { flex-direction: column; align-items: stretch; gap: 10px; padding: 16px; }
    .treatment-card a { width: 100%; }
    .quick-add-btn { width: 100%; padding: 12px; }

    .card { padding: 18px; }
    .btn-primary { width: 100%; text-align: center; }

    .auth-form { margin: 25px auto; padding: 0 4%; }

    table { display: block; overflow-x: auto; white-space: nowrap; }

    .stat-grid { gap: 12px; }
    .stat-card { min-width: 45%; }

    .admin-header { padding: 12px 4%; flex-direction: column; align-items: flex-start; }
    .admin-nav { gap: 12px; width: 100%; }
}

/* Small phones */
@media (max-width: 380px) {
    .logo { font-size: 22px; }
    .hero h1 { font-size: 22px; }
    .stat-card { min-width: 100%; }
}