/* ── AquaSicura Web — Global Styles ───────────────────────────────── */
:root {
    --primary: #7092BE;
    --primary-dark: #4a6fa5;
    --accent: #2196F3;
    --danger: #e53935;
    --success: #43a047;
    --warn: #ffa000;
    --bg: #f0f4f8;
    --card: #ffffff;
    --text: #333333;
    --text-light: #777777;
    --border: #dde3ea;
    --radius: 10px;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
body { font-family: 'Segoe UI', Arial, sans-serif; background: var(--bg); color: var(--text); }

/* ── Utility ─────────────────────────────────────────────────────── */
.screen { display: none; }
.screen.active { display: flex; }
.error-text { color: var(--danger); font-size: 13px; margin-top: 8px; }
.status-msg { font-size: 13px; margin-top: 8px; }
.status-msg.ok { color: var(--success); }
.status-msg.err { color: var(--danger); }
.loading { color: var(--text-light); text-align: center; padding: 40px; }
.hint { font-size: 13px; color: var(--text-light); margin-bottom: 14px; }

/* ── Buttons ─────────────────────────────────────────────────────── */
.btn {
    display: inline-block; border: none; border-radius: 6px; cursor: pointer;
    font-size: 14px; padding: 10px 20px; font-weight: 600; transition: .2s;
}
.btn:hover { filter: brightness(0.92); }
.btn:disabled { opacity: .5; cursor: default; }
.btn-primary { background: var(--primary); color: #fff; }
.btn-danger { background: var(--danger); color: #fff; }
.btn-outline { background: transparent; border: 1px solid var(--border); color: var(--text); }
.btn-sm { padding: 6px 14px; font-size: 12px; }
.btn-full { width: 100%; }

/* ── Login ───────────────────────────────────────────────────────── */
#login-screen {
    justify-content: center; align-items: center; min-height: 100vh;
    background: linear-gradient(135deg, #7092BE 0%, #4a6fa5 100%);
}
.login-card {
    background: var(--card); border-radius: var(--radius);
    padding: 40px 32px; width: 100%; max-width: 400px;
    box-shadow: 0 12px 40px rgba(0,0,0,.15);
}
.logo-area { text-align: center; margin-bottom: 28px; }
.logo-icon { font-size: 48px; margin-bottom: 4px; }
.logo-area h1 { font-size: 26px; color: var(--primary-dark); }
.subtitle { color: var(--text-light); font-size: 14px; margin-top: 2px; }

.form-group { margin-bottom: 16px; }
.form-group label { display: block; font-weight: 600; margin-bottom: 4px; font-size: 13px; color: var(--text-light); }
.form-group input, .form-group select {
    width: 100%; padding: 10px 12px; border: 1px solid var(--border);
    border-radius: 6px; font-size: 14px; outline: none; transition: .2s;
}
.form-group input:focus, .form-group select:focus { border-color: var(--primary); }

/* ── Navbar ──────────────────────────────────────────────────────── */
.navbar {
    display: flex; justify-content: space-between; align-items: center;
    background: var(--primary-dark); color: #fff; padding: 12px 24px;
}
.nav-logo { font-weight: 700; font-size: 18px; }
.nav-right { display: flex; align-items: center; gap: 12px; }
.nav-user { font-size: 13px; }
.nav-badge {
    font-size: 11px; background: rgba(255,255,255,.2); padding: 3px 8px;
    border-radius: 10px;
}

/* ── Tabs ────────────────────────────────────────────────────────── */
.tab-bar {
    display: flex; background: #e8eef5; border-bottom: 1px solid var(--border);
    padding: 0 24px;
}
.tab {
    padding: 12px 20px; border: none; background: transparent; cursor: pointer;
    font-weight: 600; font-size: 14px; color: var(--text-light);
    border-bottom: 3px solid transparent; transition: .2s;
}
.tab:hover { color: var(--primary-dark); }
.tab.active { color: var(--primary-dark); border-bottom-color: var(--primary); }

/* ── Tab Content ─────────────────────────────────────────────────── */
.tab-content { display: none; padding: 24px; }
.tab-content.active { display: block; }
.page-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 20px; }
.page-header h2 { font-size: 20px; }

/* ── Device Cards ────────────────────────────────────────────────── */
.device-grid {
    display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 16px;
}
.device-card {
    background: var(--card); border-radius: var(--radius); padding: 20px;
    box-shadow: 0 2px 10px rgba(0,0,0,.06); border-left: 4px solid var(--primary);
    cursor: pointer; transition: .2s;
}
.device-card:hover { box-shadow: 0 4px 20px rgba(0,0,0,.12); transform: translateY(-2px); }
.device-card.alarm-active { border-left-color: var(--danger); }
.device-card-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 12px; }
.device-card-header h3 { font-size: 16px; }
.device-status { font-size: 11px; padding: 3px 10px; border-radius: 10px; font-weight: 600; }
.device-status.online { background: #e8f5e9; color: var(--success); }
.device-status.offline { background: #ffebee; color: var(--danger); }

.sensor-grid { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 8px; }
.sensor-item { text-align: center; }
.sensor-value { font-size: 22px; font-weight: 700; color: var(--primary-dark); }
.sensor-label { font-size: 11px; color: var(--text-light); }
.sensor-item.alarm .sensor-value { color: var(--danger); }

.device-card-footer { margin-top: 12px; font-size: 11px; color: var(--text-light); }

/* ── Data Table ──────────────────────────────────────────────────── */
.data-table { width: 100%; border-collapse: collapse; background: var(--card); border-radius: var(--radius); overflow: hidden; box-shadow: 0 2px 8px rgba(0,0,0,.06); }
.data-table th { background: #e8eef5; text-align: left; padding: 12px 16px; font-size: 12px; color: var(--text-light); text-transform: uppercase; }
.data-table td { padding: 12px 16px; border-top: 1px solid var(--border); font-size: 14px; }
.data-table tr:hover td { background: #f8fafc; }

/* ── Customers Grid ──────────────────────────────────────────────── */
.customers-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(320px, 1fr)); gap: 16px; }
.customer-card {
    background: var(--card); border-radius: var(--radius); padding: 20px;
    box-shadow: 0 2px 10px rgba(0,0,0,.06); border-top: 3px solid var(--primary);
}
.customer-card h3 { margin-bottom: 8px; font-size: 16px; }
.customer-users { margin-top: 10px; font-size: 13px; }
.customer-users li { margin: 4px 0; }
.customer-devices { margin-top: 8px; font-size: 13px; color: var(--text-light); }

/* ── Alarm Config ────────────────────────────────────────────────── */
.alarm-config-card {
    background: var(--card); border-radius: var(--radius); padding: 24px;
    box-shadow: 0 2px 10px rgba(0,0,0,.06); max-width: 500px;
}
.alarm-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.alarm-row { display: flex; justify-content: space-between; align-items: center; padding: 6px 0; }
.alarm-label { font-size: 14px; font-weight: 600; }
.alarm-row input { width: 100px; padding: 6px 10px; border: 1px solid var(--border); border-radius: 6px; text-align: right; font-size: 14px; }

/* ── Modals ──────────────────────────────────────────────────────── */
.modal-overlay {
    position: fixed; inset: 0; background: rgba(0,0,0,.45);
    display: flex; justify-content: center; align-items: center; z-index: 1000;
}
.modal-card {
    background: var(--card); border-radius: var(--radius); padding: 28px;
    width: 100%; max-width: 440px; box-shadow: 0 12px 40px rgba(0,0,0,.2);
    max-height: 90vh; overflow-y: auto;
}
.modal-wide { max-width: 600px; }
.modal-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 16px; }
.modal-actions { display: flex; gap: 10px; margin-top: 20px; }

/* ── Detail Grid ─────────────────────────────────────────────────── */
.detail-grid {
    display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 12px;
}
.detail-item {
    background: #f0f4f8; border-radius: 8px; padding: 14px; text-align: center;
}
.detail-item .sensor-value { font-size: 26px; }
.detail-item .sensor-label { font-size: 12px; }
.detail-item.alarm { background: #ffebee; }

/* ── App Screen layout ───────────────────────────────────────────── */
#app-screen { flex-direction: column; min-height: 100vh; }

/* ── Responsive ──────────────────────────────────────────────────── */
@media (max-width: 600px) {
    .sensor-grid { grid-template-columns: 1fr 1fr; }
    .detail-grid { grid-template-columns: 1fr 1fr; }
    .alarm-grid { grid-template-columns: 1fr; }
    .tab { padding: 10px 12px; font-size: 13px; }
    .navbar { padding: 10px 16px; }
    .tab-content { padding: 16px; }
}