/* ==========================================================================
   EcoAdv4Pub — Main Stylesheet
   Mobile-first, responsive, eco-green theme
   ========================================================================== */

/* ── Custom Properties ─────────────────────────────────────────────────────── */
:root {
    --green-950: #052e16;
    --green-900: #14532d;
    --green-800: #166534;
    --green-700: #15803d;
    --green-600: #16a34a;
    --green-500: #22c55e;
    --green-400: #4ade80;
    --green-300: #86efac;
    --green-200: #bbf7d0;
    --green-100: #dcfce7;
    --green-50:  #f0fdf4;

    --color-primary:      var(--green-700);
    --color-primary-dk:   var(--green-900);
    --color-primary-lt:   var(--green-600);
    --color-accent:       var(--green-500);
    --color-bg:           #f8fffe;
    --color-surface:      #ffffff;
    --color-border:       #d1fae5;
    --color-text:         #1a2e1a;
    --color-text-muted:   #4b6b4b;
    --color-danger:       #dc2626;
    --color-warning:      #d97706;
    --color-success:      #059669;
    --color-info:         #0284c7;

    --font:       'Inter', system-ui, -apple-system, sans-serif;
    --radius-sm:  6px;
    --radius:     10px;
    --radius-lg:  16px;
    --radius-xl:  24px;
    --shadow-sm:  0 1px 3px rgba(0,0,0,.08);
    --shadow:     0 4px 12px rgba(0,0,0,.08);
    --shadow-lg:  0 8px 30px rgba(0,0,0,.10);
    --transition: .18s ease;
    --nav-h:      72px;
}

/* ── Reset & Base ──────────────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
    font-family: var(--font);
    background: var(--color-bg);
    color: var(--color-text);
    line-height: 1.6;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}
main { flex: 1; }
a { color: var(--color-primary); text-decoration: none; }
a:hover { text-decoration: underline; }
img { max-width: 100%; height: auto; display: block; }
ul { list-style: none; }
input, select, textarea, button { font-family: inherit; font-size: 1rem; }
h1,h2,h3,h4,h5 { line-height: 1.25; color: var(--color-text); }

/* ── Navigation ────────────────────────────────────────────────────────────── */
.navbar {
    background: var(--color-surface);
    border-bottom: 1px solid var(--color-border);
    height: var(--nav-h);
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: var(--shadow-sm);
}
.navbar-inner {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1rem;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
}
.navbar-brands {
    display: flex;
    align-items: center;
    flex-shrink: 0;
}
.m2m-brand-link {
    display: flex;
    align-items: center;
    flex-shrink: 0;
    margin-right: 1rem;
    text-decoration: none;
}
.m2m-logo {
    height: 42px;
    width: auto;
    object-fit: contain;
}
.navbar-brand {
    display: flex;
    align-items: center;
    gap: .75rem;
    text-decoration: none;
    font-weight: 700;
    font-size: 1.3rem;
    color: var(--color-text) !important;
    flex-shrink: 0;
}
.navbar-brand img {
    height: 40px;
    width: auto;
    object-fit: contain;
}
.brand-icon {
    width: 36px;
    height: 36px;
    background: linear-gradient(135deg, var(--color-primary), var(--green-600));
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-size: 1rem;
    flex-shrink: 0;
}
.brand-text {
    font-weight: 700;
    color: var(--color-text);
    white-space: nowrap;
}

.navbar-links {
    display: flex;
    align-items: center;
    gap: .25rem;
}
.navbar-links a, .navbar-links button.nav-btn {
    padding: .45rem .8rem;
    border-radius: var(--radius-sm);
    font-size: .875rem;
    font-weight: 500;
    color: var(--color-text-muted);
    transition: background var(--transition), color var(--transition);
    border: none;
    background: none;
    cursor: pointer;
    text-decoration: none;
    white-space: nowrap;
}
.navbar-links a:hover, .navbar-links button.nav-btn:hover {
    background: var(--green-100);
    color: var(--color-primary);
    text-decoration: none;
}
.navbar-links a.active { color: var(--color-primary); font-weight: 600; }
.btn-nav-cta {
    background: var(--color-primary) !important;
    color: #fff !important;
    border-radius: var(--radius-sm) !important;
    padding: .45rem 1rem !important;
}
.btn-nav-cta:hover { background: var(--color-primary-dk) !important; }

.hamburger {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: .4rem;
    border-radius: var(--radius-sm);
}
.hamburger span {
    display: block;
    width: 22px;
    height: 2px;
    background: var(--color-text);
    border-radius: 2px;
    transition: transform var(--transition), opacity var(--transition);
}
.hamburger.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.hamburger.open span:nth-child(2) { opacity: 0; }
.hamburger.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

@media (max-width: 640px) {
    .hamburger { display: flex; }
    .navbar-links {
        display: none;
        position: absolute;
        top: var(--nav-h);
        left: 0; right: 0;
        background: var(--color-surface);
        border-bottom: 1px solid var(--color-border);
        flex-direction: column;
        align-items: stretch;
        padding: .5rem 1rem 1rem;
        box-shadow: var(--shadow);
        gap: .1rem;
    }
    .navbar-links.open { display: flex; }
    .navbar-links a, .navbar-links button.nav-btn {
        padding: .7rem .8rem;
        border-radius: var(--radius-sm);
    }
    /* Prevent navbar brands from overflowing on mobile */
    .navbar-brands    { flex-shrink: 1; gap: .4rem; }
    .m2m-logo         { height: 32px; }
    .m2m-brand-link   { margin-right: .4rem; }
    .navbar-brand     { font-size: 1.1rem; gap: .4rem; }
    .brand-icon       { width: 30px; height: 30px; font-size: .875rem; }
}

/* ── Buttons ────────────────────────────────────────────────────────────────── */
.btn {
    display: inline-flex;
    align-items: center;
    gap: .4rem;
    padding: .6rem 1.25rem;
    border-radius: var(--radius);
    font-weight: 600;
    font-size: .9rem;
    cursor: pointer;
    border: 2px solid transparent;
    transition: background var(--transition), color var(--transition), border-color var(--transition), box-shadow var(--transition);
    text-decoration: none;
    white-space: nowrap;
}
.btn:hover { text-decoration: none; }
.btn:focus-visible { outline: 3px solid var(--color-accent); outline-offset: 2px; }
.btn-primary   { background: var(--color-primary); color: #fff; }
.btn-primary:hover   { background: var(--color-primary-dk); }
.btn-secondary { background: var(--green-100); color: var(--color-primary); border-color: var(--color-border); }
.btn-secondary:hover { background: var(--green-200); }
.btn-danger    { background: #fef2f2; color: var(--color-danger); border-color: #fecaca; }
.btn-danger:hover    { background: #fee2e2; }
.btn-outline   { background: transparent; color: var(--color-primary); border-color: var(--color-primary); }
.btn-outline:hover   { background: var(--green-50); }
.btn-sm { padding: .4rem .9rem; font-size: .825rem; border-radius: var(--radius-sm); }
.btn-lg { padding: .8rem 1.75rem; font-size: 1rem; border-radius: var(--radius-lg); }
.btn-block { width: 100%; justify-content: center; }
.btn[disabled] { opacity: .5; cursor: not-allowed; }

/* ── Cards ──────────────────────────────────────────────────────────────────── */
.card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    box-shadow: var(--shadow-sm);
    box-sizing: border-box;
}
.card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 1.25rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--color-border);
    gap: 1rem;
    flex-wrap: wrap;
}
.card-header h2, .card-header h3 {
    font-size: 1.1rem;
    font-weight: 700;
    margin: 0;
}
.card-body { }
.card + .card { margin-top: 1.25rem; }

.stat-card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 1.25rem 1.5rem;
    display: flex;
    align-items: center;
    gap: 1rem;
}
.stat-icon {
    font-size: 2rem;
    line-height: 1;
    width: 52px;
    height: 52px;
    background: var(--green-100);
    border-radius: var(--radius);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}
.stat-info { min-width: 0; }
.stat-value { font-size: 1.75rem; font-weight: 800; color: var(--color-primary); line-height: 1; }
.stat-label { font-size: .8rem; color: var(--color-text-muted); margin-top: .2rem; }

/* ── Stats grid ─────────────────────────────────────────────────────────────── */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
    gap: 1rem;
    margin-bottom: 1.5rem;
}

/* ── Forms ──────────────────────────────────────────────────────────────────── */
.form-group { margin-bottom: 1.1rem; }
.form-group label {
    display: block;
    font-weight: 600;
    font-size: .875rem;
    color: var(--color-text);
    margin-bottom: .4rem;
}
.form-group label .req { color: var(--color-danger); margin-left: 2px; }
.form-control {
    display: block;
    width: 100%;
    padding: .65rem .9rem;
    border: 1.5px solid var(--color-border);
    border-radius: var(--radius);
    background: var(--color-surface);
    color: var(--color-text);
    transition: border-color var(--transition), box-shadow var(--transition);
    appearance: none;
}
.form-control:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(21,128,61,.12);
}
.form-control.is-invalid { border-color: var(--color-danger); }
.form-control::placeholder { color: #9ca3af; }
textarea.form-control { resize: vertical; min-height: 90px; }
select.form-control { cursor: pointer; }
.form-hint { font-size: .78rem; color: var(--color-text-muted); margin-top: .3rem; }
.form-error { font-size: .8rem; color: var(--color-danger); margin-top: .3rem; display: flex; align-items: center; gap: .3rem; }

.checkbox-group { display: flex; flex-direction: column; gap: .6rem; }
.checkbox-item {
    display: flex;
    align-items: flex-start;
    gap: .65rem;
    padding: .75rem 1rem;
    border: 1.5px solid var(--color-border);
    border-radius: var(--radius);
    cursor: pointer;
    transition: background var(--transition), border-color var(--transition);
    background: var(--color-surface);
}
.checkbox-item:hover { background: var(--green-50); border-color: var(--color-primary); }
.checkbox-item input[type="checkbox"] {
    width: 18px; height: 18px;
    accent-color: var(--color-primary);
    flex-shrink: 0;
    margin-top: 2px;
    cursor: pointer;
}
.checkbox-item.checked { background: var(--green-50); border-color: var(--color-primary); }
.checkbox-label { font-size: .875rem; }
.checkbox-label strong { display: block; color: var(--color-text); }
.checkbox-label span { color: var(--color-text-muted); font-size: .8rem; }

.form-row { display: grid; gap: 1rem; grid-template-columns: 1fr; }
@media (min-width: 600px) { .form-row-2 { grid-template-columns: 1fr 1fr; } }

/* ── Tables ─────────────────────────────────────────────────────────────────── */
.table-wrap { overflow-x: auto; -webkit-overflow-scrolling: touch; border-radius: var(--radius-lg); border: 1px solid var(--color-border); }
table { width: 100%; border-collapse: collapse; font-size: .875rem; background: var(--color-surface); }
thead th {
    background: var(--green-50);
    font-weight: 700;
    font-size: .78rem;
    text-transform: uppercase;
    letter-spacing: .05em;
    color: var(--color-text-muted);
    padding: .75rem 1rem;
    text-align: left;
    border-bottom: 1px solid var(--color-border);
    white-space: nowrap;
}
tbody td { padding: .85rem 1rem; border-bottom: 1px solid var(--color-border); vertical-align: middle; }
tbody tr:last-child td { border-bottom: none; }
tbody tr:hover { background: var(--green-50); }
.td-actions { display: flex; gap: .4rem; flex-wrap: wrap; }

/* ── Badges ─────────────────────────────────────────────────────────────────── */
.badge {
    display: inline-flex;
    align-items: center;
    gap: .25rem;
    padding: .25rem .65rem;
    border-radius: 99px;
    font-size: .75rem;
    font-weight: 700;
    line-height: 1;
    white-space: nowrap;
}
.badge-green   { background: var(--green-100); color: var(--green-800); }
.badge-yellow  { background: #fef9c3; color: #854d0e; }
.badge-red     { background: #fee2e2; color: #991b1b; }
.badge-blue    { background: #dbeafe; color: #1e40af; }
.badge-gray    { background: #f3f4f6; color: #4b5563; }
.badge-active  { background: var(--green-100); color: var(--green-800); }
.badge-paused  { background: #fef9c3; color: #854d0e; }
.badge-ended   { background: #f3f4f6; color: #4b5563; }
.badge-eco-1   { background: #f3f4f6; color: #374151; }
.badge-eco-2   { background: #ecfccb; color: #365314; }
.badge-eco-3   { background: #d1fae5; color: #065f46; }
.badge-eco-4   { background: #bbf7d0; color: #14532d; }
.badge-eco-5   { background: #86efac; color: #052e16; }

/* ── Alerts ─────────────────────────────────────────────────────────────────── */
.alert {
    padding: .9rem 1.1rem;
    border-radius: var(--radius);
    font-size: .9rem;
    display: flex;
    align-items: flex-start;
    gap: .6rem;
    border: 1px solid transparent;
    margin-bottom: 1rem;
}
.alert-success { background: #f0fdf4; color: #14532d; border-color: #bbf7d0; }
.alert-error   { background: #fef2f2; color: #7f1d1d; border-color: #fecaca; }
.alert-info    { background: #eff6ff; color: #1e3a8a; border-color: #bfdbfe; }
.alert-warning { background: #fffbeb; color: #78350f; border-color: #fde68a; }
.alert-icon    { font-size: 1.1rem; flex-shrink: 0; margin-top: 1px; }

/* ── Page layouts ─────────────────────────────────────────────────────────────*/
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1rem;
}
.container-sm {
    max-width: 560px;
    margin: 0 auto;
    padding: 0 1rem;
}
.container-md {
    max-width: 800px;
    margin: 0 auto;
    padding: 0 1rem;
}
.page-header {
    padding: 2rem 0 1.5rem;
    border-bottom: 1px solid var(--color-border);
    margin-bottom: 1.75rem;
}
.page-header h1 { font-size: 1.75rem; font-weight: 800; }
.page-header p  { color: var(--color-text-muted); margin-top: .4rem; }

.dashboard-layout {
    display: grid;
    gap: 1.5rem;
    padding: 1.5rem 0;
}
@media (min-width: 1024px) {
    .dashboard-layout { grid-template-columns: 1fr 320px; }
    .dashboard-main   { min-width: 0; }
}

/* ── Hero section ────────────────────────────────────────────────────────────── */
.hero {
    background: linear-gradient(135deg, var(--green-900) 0%, var(--green-700) 60%, var(--green-500) 100%);
    color: #fff;
    padding: 4rem 1rem 5rem;
    text-align: center;
    position: relative;
    overflow: hidden;
}
.hero::before {
    content: '';
    position: absolute;
    inset: 0;
    background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.04'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
    opacity: 1;
}
.hero-inner { position: relative; max-width: 720px; margin: 0 auto; }
.hero h1 {
    font-size: clamp(1.8rem, 5vw, 3rem);
    font-weight: 900;
    color: #fff;
    margin-bottom: 1rem;
    text-shadow: 0 2px 8px rgba(0,0,0,.2);
}
.hero p {
    font-size: clamp(1rem, 2.5vw, 1.2rem);
    color: rgba(255,255,255,.88);
    margin-bottom: 2rem;
    max-width: 560px;
    margin-left: auto;
    margin-right: auto;
}
.hero-ctas { display: flex; gap: .75rem; flex-wrap: wrap; justify-content: center; }
.btn-hero-primary {
    background: #fff;
    color: var(--green-800);
    font-weight: 700;
    padding: .8rem 1.75rem;
    border-radius: var(--radius-xl);
    font-size: 1rem;
    box-shadow: 0 4px 16px rgba(0,0,0,.15);
    border: none;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    gap: .4rem;
    text-decoration: none;
    transition: transform var(--transition), box-shadow var(--transition);
}
.btn-hero-primary:hover { transform: translateY(-2px); box-shadow: 0 6px 20px rgba(0,0,0,.2); text-decoration: none; }
.btn-hero-secondary {
    background: rgba(255,255,255,.15);
    color: #fff;
    font-weight: 600;
    padding: .8rem 1.75rem;
    border-radius: var(--radius-xl);
    font-size: 1rem;
    border: 2px solid rgba(255,255,255,.4);
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    gap: .4rem;
    text-decoration: none;
    transition: background var(--transition), border-color var(--transition);
}
.btn-hero-secondary:hover { background: rgba(255,255,255,.25); border-color: rgba(255,255,255,.7); text-decoration: none; }

/* ── Feature grid ─────────────────────────────────────────────────────────────*/
.section { padding: 3.5rem 0; }
.section-title {
    text-align: center;
    margin-bottom: 2.5rem;
}
.section-title h2 { font-size: clamp(1.4rem, 3vw, 2rem); font-weight: 800; }
.section-title p  { color: var(--color-text-muted); margin-top: .5rem; max-width: 560px; margin-left: auto; margin-right: auto; }

.features-grid {
    display: grid;
    gap: 1.25rem;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
}
.feature-card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 1.75rem;
    text-align: center;
    transition: transform var(--transition), box-shadow var(--transition);
}
.feature-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
.feature-icon { font-size: 2.5rem; margin-bottom: .75rem; }
.feature-card h3 { font-size: 1.1rem; font-weight: 700; margin-bottom: .5rem; }
.feature-card p  { font-size: .9rem; color: var(--color-text-muted); }

/* ── Steps ───────────────────────────────────────────────────────────────────── */
.steps { display: grid; gap: 1.5rem; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); }
.step { display: flex; align-items: flex-start; gap: 1rem; }
.step-num {
    width: 36px; height: 36px;
    background: var(--color-primary);
    color: #fff;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 800;
    font-size: .9rem;
    flex-shrink: 0;
}
.step-body h4 { font-size: 1rem; font-weight: 700; margin-bottom: .3rem; }
.step-body p  { font-size: .875rem; color: var(--color-text-muted); }

/* ── Eco score display ────────────────────────────────────────────────────────*/
.eco-score-display {
    display: flex;
    align-items: center;
    gap: .5rem;
    flex-wrap: wrap;
}
.eco-leaves { font-size: 1rem; letter-spacing: .1em; }
.eco-score-num { font-size: .8rem; color: var(--color-text-muted); }

/* ── Campaign cards ───────────────────────────────────────────────────────────*/
.campaign-grid {
    display: grid;
    gap: 1.25rem;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
}
.campaign-card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: box-shadow var(--transition), transform var(--transition);
}
.campaign-card:hover { box-shadow: var(--shadow-lg); transform: translateY(-2px); }
.campaign-banner {
    width: 100%;
    height: 140px;
    object-fit: cover;
    background: var(--green-100);
    display: block;
}
.campaign-banner-placeholder {
    width: 100%;
    height: 140px;
    background: linear-gradient(135deg, var(--green-100), var(--green-200));
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2.5rem;
}
.campaign-body { padding: 1.1rem; }
.campaign-body h3 { font-size: 1rem; font-weight: 700; margin-bottom: .4rem; }
.campaign-body .meta {
    font-size: .8rem;
    color: var(--color-text-muted);
    display: flex;
    gap: .6rem;
    flex-wrap: wrap;
    margin-bottom: .75rem;
}
.campaign-body .actions { display: flex; gap: .5rem; flex-wrap: wrap; }

/* ── Code block ─────────────────────────────────────────────────────────────── */
.code-block {
    background: #0f1117;
    color: #e2f8e8;
    border-radius: var(--radius);
    padding: 1.25rem;
    font-family: 'Courier New', monospace;
    font-size: .82rem;
    line-height: 1.6;
    overflow-x: auto;
    position: relative;
}
.code-block pre {
    margin: 0;
    padding-top: 1.8rem;  /* make room for the copy button */
    white-space: pre-wrap;
    word-break: break-all;
}
.code-block .copy-btn {
    position: absolute;
    top: .6rem;
    right: .6rem;
    background: rgba(255,255,255,.1);
    border: none;
    color: #e2f8e8;
    padding: .3rem .7rem;
    border-radius: var(--radius-sm);
    font-size: .75rem;
    cursor: pointer;
    transition: background var(--transition);
}
.code-block .copy-btn:hover { background: rgba(255,255,255,.2); }

/* ── Auth pages ─────────────────────────────────────────────────────────────── */
.auth-wrap {
    min-height: calc(100vh - var(--nav-h));
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 2rem 1rem;
    background: linear-gradient(160deg, var(--green-50) 0%, #fff 100%);
}
.auth-card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
    padding: 2rem;
    width: 100%;
    max-width: 480px;
    box-shadow: var(--shadow-lg);
}
.auth-card h1 { font-size: 1.5rem; font-weight: 800; margin-bottom: .5rem; }
.auth-card .subtitle { color: var(--color-text-muted); font-size: .9rem; margin-bottom: 1.75rem; }
.auth-footer { text-align: center; font-size: .875rem; margin-top: 1.25rem; color: var(--color-text-muted); }
.auth-divider { text-align: center; margin: 1.25rem 0; color: var(--color-text-muted); font-size: .85rem; position: relative; }
.auth-divider::before, .auth-divider::after {
    content: '';
    position: absolute;
    top: 50%;
    width: 40%;
    height: 1px;
    background: var(--color-border);
}
.auth-divider::before { left: 0; }
.auth-divider::after  { right: 0; }

.role-selector { display: grid; grid-template-columns: 1fr 1fr; gap: .75rem; margin-bottom: 1.5rem; }
.role-option { display: none; }
.role-label {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: .4rem;
    padding: 1rem .5rem;
    border: 2px solid var(--color-border);
    border-radius: var(--radius-lg);
    cursor: pointer;
    text-align: center;
    transition: border-color var(--transition), background var(--transition);
    font-size: .85rem;
    font-weight: 600;
    color: var(--color-text-muted);
}
.role-label:hover { border-color: var(--color-primary); background: var(--green-50); }
.role-label .icon { font-size: 2rem; }
.role-option:checked + .role-label {
    border-color: var(--color-primary);
    background: var(--green-100);
    color: var(--color-primary);
}

/* ── AdSense unit ─────────────────────────────────────────────────────────────*/
.adsense-unit {
    width: 100%;
    min-height: 90px;
    margin: 1.5rem 0;
    text-align: center;
}
.adsense-separator {
    text-align: center;
    font-size: .72rem;
    color: #aaa;
    margin-bottom: .4rem;
    letter-spacing: .06em;
    text-transform: uppercase;
}

/* ── Scroll-to-top button ─────────────────────────────────────────────────────*/
#scroll-top {
    position: fixed;
    bottom: 1.5rem;
    right: 1.5rem;
    width: 46px;
    height: 46px;
    background: var(--color-primary);
    color: #fff;
    border: none;
    border-radius: 50%;
    cursor: pointer;
    font-size: 1.2rem;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 14px rgba(21,128,61,.4);
    transition: opacity var(--transition), transform var(--transition), background var(--transition);
    opacity: 0;
    pointer-events: none;
    z-index: 999;
    transform: translateY(10px);
}
#scroll-top.visible { opacity: 1; pointer-events: auto; transform: translateY(0); }
#scroll-top:hover { background: var(--color-primary-dk); transform: translateY(-2px); }

/* ── Footer ─────────────────────────────────────────────────────────────────── */
footer {
    background: var(--green-900);
    color: rgba(255,255,255,.8);
    padding: 2.5rem 1rem;
    margin-top: auto;
}
.footer-inner {
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    gap: 2rem;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
}
.footer-brand .brand-name {
    font-size: 1.1rem;
    font-weight: 800;
    color: #fff;
    display: block;
    margin-bottom: .4rem;
}
.footer-brand p { font-size: .83rem; line-height: 1.5; }
footer h4 { color: #fff; font-size: .875rem; font-weight: 700; margin-bottom: .75rem; }
footer ul li { margin-bottom: .4rem; }
footer ul li a { color: rgba(255,255,255,.7); font-size: .83rem; }
footer ul li a:hover { color: #fff; text-decoration: none; }
.footer-bottom {
    border-top: 1px solid rgba(255,255,255,.12);
    padding-top: 1.25rem;
    margin-top: 1.5rem;
    text-align: center;
    font-size: .78rem;
    color: rgba(255,255,255,.5);
}

/* ── Tab navigation ──────────────────────────────────────────────────────────── */
.tab-nav {
    display: flex;
    gap: .25rem;
    border-bottom: 2px solid var(--color-border);
    margin-bottom: 1.5rem;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
}
.tab-btn {
    padding: .65rem 1.1rem;
    border: none;
    background: none;
    cursor: pointer;
    font-size: .875rem;
    font-weight: 600;
    color: var(--color-text-muted);
    border-bottom: 2px solid transparent;
    margin-bottom: -2px;
    white-space: nowrap;
    transition: color var(--transition), border-color var(--transition);
}
.tab-btn:hover { color: var(--color-primary); }
.tab-btn.active { color: var(--color-primary); border-bottom-color: var(--color-primary); }
.tab-panel { display: none; }
.tab-panel.active { display: block; }

/* ── Empty state ─────────────────────────────────────────────────────────────── */
.empty-state {
    text-align: center;
    padding: 3rem 1rem;
    color: var(--color-text-muted);
}
.empty-state .icon { font-size: 3rem; margin-bottom: .75rem; }
.empty-state h3 { font-size: 1.1rem; font-weight: 700; color: var(--color-text); margin-bottom: .4rem; }
.empty-state p  { font-size: .9rem; margin-bottom: 1.25rem; }

/* ── Misc ─────────────────────────────────────────────────────────────────────*/
.divider { height: 1px; background: var(--color-border); margin: 1.5rem 0; }
.text-muted { color: var(--color-text-muted); }
.text-center { text-align: center; }
.mt-1 { margin-top: .4rem; }
.mt-2 { margin-top: .8rem; }
.mt-3 { margin-top: 1.25rem; }
.mt-4 { margin-top: 1.75rem; }
.mb-1 { margin-bottom: .4rem; }
.mb-2 { margin-bottom: .8rem; }
.mb-3 { margin-bottom: 1.25rem; }
.flex-between { display: flex; align-items: center; justify-content: space-between; gap: 1rem; flex-wrap: wrap; }
.flex-gap { display: flex; align-items: center; gap: .5rem; flex-wrap: wrap; }
.w-full { width: 100%; }

/* ── Banner preview ──────────────────────────────────────────────────────────── */
.banner-preview-box {
    border: 2px dashed var(--color-border);
    border-radius: var(--radius);
    padding: 1rem;
    min-height: 80px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--green-50);
    text-align: center;
    color: var(--color-text-muted);
    font-size: .85rem;
}
.banner-preview-box img { max-height: 250px; max-width: 100%; border-radius: var(--radius-sm); }

/* ── Responsive utilities ─────────────────────────────────────────────────────*/
@media (max-width: 480px) {
    /* Cards & layout */
    .card           { padding: 1rem; }
    .auth-card      { padding: 1.25rem; }
    .section        { padding: 2rem 0; }
    .section-title  { margin-bottom: 1.5rem; }
    /* Hero */
    .hero           { padding: 2.5rem 1rem 3.5rem; }
    .hero-ctas      { flex-direction: column; align-items: stretch; }
    .btn-hero-primary,
    .btn-hero-secondary { justify-content: center; text-align: center; }
    /* Page headers */
    .page-header    { padding: 1rem 0; }
    .page-header h1 { font-size: 1.3rem; }
    .flex-between.page-header { align-items: flex-start; }
    /* Stats */
    .stats-grid     { grid-template-columns: 1fr 1fr; gap: .6rem; }
    .stat-card      { padding: .85rem; }
    .stat-value     { font-size: 1.3rem; }
    .stat-icon      { width: 38px; height: 38px; font-size: 1.3rem; }
    /* Card internals */
    .card-header    { flex-direction: column; align-items: flex-start; }
    .tab-btn        { padding: .5rem .8rem; font-size: .8rem; }
}

/* ── Very small phones (≤400 px) ──────────────────────────────────────────────*/
@media (max-width: 400px) {
    /* Hide brand text — just show the 🌿 icon to save space */
    .brand-text     { display: none; }
    .m2m-logo       { height: 26px; }
    .navbar-inner   { gap: .4rem; }
    /* Single-column stats on tiny screens */
    .stats-grid     { grid-template-columns: 1fr; }
    /* Tighter container padding */
    .container,
    .container-sm,
    .container-md   { padding: 0 .75rem; }
    .card           { padding: .85rem; }
}

/* ── Homepage: collapse side-by-side grids to single column on mobile ──────── */
@media (max-width: 640px) {
    /* "For Advertisers / For Publishers" heading + content rows */
    .how-it-works-grid {
        grid-template-columns: 1fr !important;
        grid-template-rows: auto !important;
    }
    /* Restore full card radius when stacked */
    .how-it-works-grid > div:nth-child(1),
    .how-it-works-grid > div:nth-child(2) {
        border-radius: var(--radius-lg) !important;
        border-bottom: 1px solid var(--color-border) !important;
    }
    .how-it-works-grid > div:nth-child(3),
    .how-it-works-grid > div:nth-child(4) {
        border-radius: var(--radius-lg) !important;
        border-top: 1px solid var(--color-border) !important;
    }
    /* Eco-rating: 1 column */
    .eco-rating-grid {
        grid-template-columns: 1fr !important;
    }
}