:root {
    --color-bg: #f4f6f8;
    --color-surface: #ffffff;
    --color-border: #dde2e7;
    --color-text: #1f2933;
    --color-text-muted: #65727e;
    --color-primary: #1a5d3a;
    --color-primary-dark: #0f3d26;
    --color-primary-light: #e6f1ea;
    --color-accent: #b8862b;
    --color-danger: #c0392b;
    --color-danger-light: #fbeae8;
    --color-warning: #d68910;
    --color-warning-light: #fdf2e3;
    --color-success: #1a5d3a;
    --color-success-light: #e6f1ea;
    --radius: 8px;
    --shadow: 0 1px 3px rgba(0,0,0,0.08), 0 1px 2px rgba(0,0,0,0.04);
    --shadow-md: 0 4px 12px rgba(0,0,0,0.08);
}

* { box-sizing: border-box; }

body {
    margin: 0;
    font-family: 'Segoe UI', system-ui, -apple-system, Roboto, sans-serif;
    background: var(--color-bg);
    color: var(--color-text);
    font-size: 15px;
    line-height: 1.5;
}

a { color: var(--color-primary); text-decoration: none; }

/* ---------------- Topbar ---------------- */
.topbar {
    background: var(--color-primary-dark);
    color: white;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 24px;
    height: 60px;
}
.topbar-brand {
    font-weight: 600;
    font-size: 17px;
    display: flex;
    align-items: center;
    gap: 10px;
}
.brand-icon { font-size: 20px; }
.topbar-nav { display: flex; gap: 4px; }
.topbar-nav a {
    color: rgba(255,255,255,0.75);
    padding: 8px 16px;
    border-radius: var(--radius);
    font-weight: 500;
    transition: background 0.15s, color 0.15s;
}
.topbar-nav a:hover { background: rgba(255,255,255,0.08); color: white; }
.topbar-nav a.active { background: var(--color-primary); color: white; }

.topbar-user { display: flex; align-items: center; gap: 14px; }
.topbar-user-name { color: white; font-weight: 600; font-size: 14px; }
.topbar-user-name:hover { text-decoration: underline; }
.topbar-logout {
    color: rgba(255,255,255,0.75);
    font-size: 13px;
    padding: 6px 12px;
    border-radius: var(--radius);
    border: 1px solid rgba(255,255,255,0.25);
}
.topbar-logout:hover { background: rgba(255,255,255,0.1); color: white; }

/* ---------------- Layout ---------------- */
.container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 28px 24px 60px;
}

h1 { font-size: 24px; font-weight: 700; margin: 0 0 4px; }
h2 { font-size: 18px; font-weight: 600; margin: 0 0 16px; }
h3 { font-size: 15px; font-weight: 600; margin: 0 0 10px; color: var(--color-text-muted); text-transform: uppercase; letter-spacing: 0.03em; }

.page-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-end;
    margin-bottom: 24px;
    flex-wrap: wrap;
    gap: 12px;
}
.page-subtitle { color: var(--color-text-muted); font-size: 14px; margin-top: 2px; }

/* ---------------- Cards ---------------- */
.card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    padding: 20px;
    box-shadow: var(--shadow);
    margin-bottom: 20px;
}
.card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 16px;
    margin-bottom: 24px;
}
.stat-card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    padding: 18px 20px;
    box-shadow: var(--shadow);
}
.stat-card .stat-value { font-size: 28px; font-weight: 700; color: var(--color-primary-dark); }
.stat-card .stat-label { color: var(--color-text-muted); font-size: 13px; margin-top: 4px; }
.stat-card.danger .stat-value { color: var(--color-danger); }
.stat-card.warning .stat-value { color: var(--color-warning); }

/* ---------------- Buttons ---------------- */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 9px 16px;
    border-radius: var(--radius);
    border: 1px solid transparent;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: background 0.15s, border-color 0.15s;
    text-decoration: none;
}
.btn-primary { background: var(--color-primary); color: white; }
.btn-primary:hover { background: var(--color-primary-dark); }
.btn-secondary { background: var(--color-surface); color: var(--color-text); border-color: var(--color-border); }
.btn-secondary:hover { background: var(--color-bg); }
.btn-danger { background: var(--color-danger); color: white; }
.btn-danger:hover { background: #9c2d20; }
.btn-sm { padding: 6px 12px; font-size: 13px; }

/* ---------------- Forms ---------------- */
label { display: block; font-size: 13px; font-weight: 600; color: var(--color-text-muted); margin-bottom: 4px; }
input, select, textarea {
    width: 100%;
    padding: 9px 12px;
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    font-size: 14px;
    font-family: inherit;
    background: white;
    color: var(--color-text);
}
input:focus, select:focus, textarea:focus { outline: 2px solid var(--color-primary-light); border-color: var(--color-primary); }
.form-group { margin-bottom: 16px; }
.form-row { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 14px; }
.form-actions { margin-top: 20px; display: flex; gap: 10px; }
fieldset { border: 1px solid var(--color-border); border-radius: var(--radius); padding: 16px; margin-bottom: 16px; }
legend { font-weight: 600; padding: 0 6px; color: var(--color-primary-dark); }
.checkbox-row { display: flex; align-items: center; gap: 8px; }
.checkbox-row input { width: auto; }

/* ---------------- Tables ---------------- */
table { width: 100%; border-collapse: collapse; font-size: 14px; }
th, td { padding: 10px 12px; text-align: left; border-bottom: 1px solid var(--color-border); }
th { color: var(--color-text-muted); font-weight: 600; font-size: 12px; text-transform: uppercase; letter-spacing: 0.03em; }
tbody tr:hover { background: var(--color-bg); }
.table-wrap { overflow-x: auto; }

/* ---------------- Badges ---------------- */
.badge {
    display: inline-block;
    padding: 3px 10px;
    border-radius: 999px;
    font-size: 12px;
    font-weight: 600;
}
.badge-estoque { background: #e8eef7; color: #2c5282; }
.badge-uso { background: var(--color-success-light); color: var(--color-success); }
.badge-afiacao { background: var(--color-warning-light); color: var(--color-warning); }
.badge-descartado { background: var(--color-danger-light); color: var(--color-danger); }
.badge-reparo { background: #f0e6f7; color: #6b3fa0; }

/* ---------------- Flash messages ---------------- */
.flash-container { margin-bottom: 20px; }
.flash { padding: 12px 16px; border-radius: var(--radius); margin-bottom: 8px; font-size: 14px; font-weight: 500; }
.flash-success { background: var(--color-success-light); color: var(--color-success); border: 1px solid #b9dcc8; }
.flash-danger { background: var(--color-danger-light); color: var(--color-danger); border: 1px solid #efc3bd; }

/* ---------------- Tabs ---------------- */
.tabs { display: flex; gap: 4px; border-bottom: 1px solid var(--color-border); margin-bottom: 20px; }
.tab-btn {
    padding: 10px 18px; cursor: pointer; border: none; background: none;
    font-weight: 600; color: var(--color-text-muted); border-bottom: 2px solid transparent;
    font-size: 14px;
}
.tab-btn.active { color: var(--color-primary-dark); border-bottom-color: var(--color-primary); }
.tab-content { display: none; }
.tab-content.active { display: block; }

/* ---------------- Photo gallery ---------------- */
.photo-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(140px, 1fr)); gap: 12px; }
.photo-item { position: relative; border-radius: var(--radius); overflow: hidden; border: 1px solid var(--color-border); }
.photo-item img { width: 100%; height: 120px; object-fit: cover; display: block; }
.photo-item .photo-caption { font-size: 11px; padding: 6px 8px; color: var(--color-text-muted); background: white; }

/* ---------------- Misc ---------------- */
.muted { color: var(--color-text-muted); }
.text-right { text-align: right; }
.empty-state { text-align: center; padding: 40px 20px; color: var(--color-text-muted); }
.divider { border: none; border-top: 1px solid var(--color-border); margin: 24px 0; }
.filter-bar { display: flex; gap: 10px; flex-wrap: wrap; margin-bottom: 18px; align-items: end; }
.filter-bar .form-group { margin-bottom: 0; min-width: 160px; }
.dynamic-row { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr auto; gap: 10px; margin-bottom: 10px; align-items: end; }
.remove-row-btn { background: var(--color-danger-light); color: var(--color-danger); border: none; border-radius: var(--radius); padding: 9px 12px; cursor: pointer; font-weight: 700; }
.progress-bar { height: 8px; background: var(--color-border); border-radius: 4px; overflow: hidden; margin-top: 6px; }
.progress-bar-fill { height: 100%; background: var(--color-primary); }
.progress-bar-fill.warning { background: var(--color-warning); }
.progress-bar-fill.danger { background: var(--color-danger); }

/* ---------------- Modals ---------------- */
.modal-backdrop {
    display: none;
    position: fixed;
    top: 0; left: 0; right: 0; bottom: 0;
    background: rgba(15, 25, 35, 0.5);
    align-items: center;
    justify-content: center;
    z-index: 1000;
    padding: 20px;
}
.modal {
    background: var(--color-surface);
    border-radius: var(--radius);
    padding: 24px;
    max-width: 520px;
    width: 100%;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: var(--shadow-md);
}