/* BouwKostenPro v8.0 — Base (Sprint C: Visual Perfection) */

*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{font-size:13px;-webkit-text-size-adjust:100%}
body{font-family:var(--font);background:var(--bg);color:var(--text1);line-height:1.5;min-height:100vh;overflow-x:hidden;transition:background var(--t-normal),color var(--t-normal)}
body.light{transition:background var(--t-normal),color var(--t-normal)}

/* ═══ TYPOGRAPHY SCALE ═══ */
h1{font-size:22px;font-weight:900;letter-spacing:-.02em}
h2{font-size:16px;font-weight:800;letter-spacing:-.01em}
h3{font-size:14px;font-weight:700}
.text-xs{font-size:9px}.text-sm{font-size:11px}.text-md{font-size:13px}.text-lg{font-size:16px}.text-xl{font-size:18px}
.fw-400{font-weight:400}.fw-500{font-weight:500}.fw-600{font-weight:600}.fw-700{font-weight:700}.fw-800{font-weight:800}.fw-900{font-weight:900}
.text-muted,.text-dim{color:var(--text3)}.text-muted2{color:var(--text4)}
.text-center{text-align:center}.text-right{text-align:right}
.text-green{color:var(--accent)}.text-red{color:var(--red)}.text-warn{color:var(--warn)}.text-blue{color:var(--blue)}

/* ═══ SPACING (4px grid) ═══ */
.mt-4{margin-top:4px}.mt-8{margin-top:8px}.mt-12{margin-top:12px}.mt-16{margin-top:16px}.mt-20{margin-top:20px}.mt-24{margin-top:24px}
.mb-4{margin-bottom:4px}.mb-8{margin-bottom:8px}.mb-12{margin-bottom:12px}.mb-16{margin-bottom:16px}.mb-20{margin-bottom:20px}
.ml-4{margin-left:4px}.mr-4{margin-right:4px}
.p-4{padding:4px}.p-8{padding:8px}.p-12{padding:12px}.p-16{padding:16px}

/* ═══ FLEXBOX ═══ */
.flex{display:flex}.flex-col{flex-direction:column}.flex-wrap{flex-wrap:wrap}
.items-center{align-items:center}.items-start{align-items:start}.items-end{align-items:end}
.justify-between{justify-content:space-between}.justify-center{justify-content:center}.justify-end{justify-content:flex-end}
.gap-4{gap:4px}.gap-6{gap:6px}.gap-8{gap:8px}.gap-12{gap:12px}.gap-16{gap:16px}
.flex-1{flex:1}

/* ═══ GRID ═══ */
.grid-2{display:grid;grid-template-columns:1fr 1fr;gap:var(--gap)}
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:var(--gap)}
.grid-4{display:grid;grid-template-columns:repeat(4,1fr);gap:var(--gap)}

/* ═══ CARDS ═══ */
.card{background:var(--card);border:1px solid var(--border);border-radius:var(--r);padding:var(--pad);transition:transform var(--t-fast),box-shadow var(--t-fast),background var(--t-fast)}
.card:hover{box-shadow:var(--shadow-sm)}
.card-clickable{cursor:pointer}.card-clickable:hover{transform:translateY(-1px);box-shadow:var(--shadow-md)}
.card-clickable:active{transform:translateY(0);box-shadow:none}
.card-title{font-size:13px;font-weight:800;color:var(--text1);display:flex;align-items:center;gap:6px}
.card-selected{border-color:var(--accent);background:var(--accent-glow)}

/* Category color line on left */
.card-cat-line{border-left:4px solid var(--text4);padding-left:12px}

/* ═══ BUTTONS ═══ */
.btn{display:inline-flex;align-items:center;gap:5px;padding:7px 14px;border-radius:var(--r-sm);font-family:var(--font);font-size:11px;font-weight:700;cursor:pointer;border:1px solid transparent;transition:all var(--t-fast);user-select:none;white-space:nowrap;position:relative;overflow:hidden}
.btn:active{transform:scale(.97)}
.btn-primary{background:var(--accent);color:#fff;border-color:var(--accent)}.btn-primary:hover{background:var(--accent-dark)}
.btn-danger{background:var(--red);color:#fff;border-color:var(--red)}.btn-danger:hover{opacity:.85}
.btn-secondary{background:transparent;color:var(--text2);border-color:var(--border2)}.btn-secondary:hover{border-color:var(--text2);color:var(--text1)}
.btn-ghost{background:transparent;color:var(--text2);border:none;padding:5px 8px}.btn-ghost:hover{color:var(--text1);background:var(--card-hover)}
.btn-sm{padding:4px 10px;font-size:10px}
.btn-lg{padding:10px 20px;font-size:13px}
.btn:disabled,.btn-disabled{opacity:.4;cursor:not-allowed;pointer-events:none}
.btn-loading{color:transparent!important;pointer-events:none}
.btn-loading::after{content:'';position:absolute;inset:0;margin:auto;width:14px;height:14px;border:2px solid rgba(255,255,255,.3);border-top-color:#fff;border-radius:50%;animation:spin .5s linear infinite}
@keyframes spin{to{transform:rotate(360deg)}}

/* ═══ FORMS ═══ */
.form-group{margin-bottom:12px}
.form-label{display:block;font-size:10px;font-weight:700;color:var(--text2);margin-bottom:4px;text-transform:uppercase;letter-spacing:.04em}
.form-label .required{color:var(--red)}
.form-hint{font-size:9px;color:var(--text3);margin-top:2px}
.form-input{width:100%;padding:8px 10px;background:var(--surface);color:var(--text1);border:1px solid var(--border2);border-radius:var(--r-sm);font-family:var(--font);font-size:12px;transition:border-color var(--t-fast),box-shadow var(--t-fast);outline:none}
.form-input:focus{border-color:var(--accent);box-shadow:0 0 0 3px var(--accent-glow)}
.form-input:invalid,.form-input-error{border-color:var(--red);box-shadow:0 0 0 3px var(--red-glow)}
.form-input::placeholder{color:var(--text4)}
.form-select{appearance:none;background-image:url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%234B6380' stroke-width='2'%3e%3cpath d='M6 9l6 6 6-6'/%3e%3c/svg%3e");background-repeat:no-repeat;background-position:right 10px center;padding-right:30px}
.form-row{display:grid;grid-template-columns:1fr 1fr;gap:10px}
.form-check{display:flex;align-items:center;gap:8px;font-size:12px;cursor:pointer}
.form-check input[type="checkbox"]{width:16px;height:16px;accent-color:var(--accent);cursor:pointer}
.form-error{font-size:9px;color:var(--red);margin-top:2px}

/* ═══ PILLS / TAGS ═══ */
.pill{display:inline-flex;align-items:center;gap:3px;padding:2px 7px;border-radius:var(--r-pill);font-size:10px;font-weight:700;cursor:default;white-space:nowrap;transition:opacity var(--t-fast)}
.pill-clickable{cursor:pointer}.pill-clickable:hover{opacity:.75}

/* ═══ PROGRESS BARS ═══ */
.progress{height:6px;background:var(--surface);border-radius:3px;overflow:hidden}
.progress-fill{height:100%;border-radius:3px;transition:width var(--t-slow);background:var(--accent)}
.progress-fill-warn{background:var(--warn)}
.progress-fill-red{background:var(--red)}
.progress-label{display:flex;justify-content:space-between;font-size:9px;color:var(--text3);margin-top:2px}

/* ═══ BTW PREVIEW ═══ */
.btw-preview{background:var(--surface);border:1px solid var(--border);border-radius:var(--r-sm);padding:8px;margin-top:8px}
.btw-row{display:flex;justify-content:space-between;font-size:10px;padding:2px 0;color:var(--text2)}
.btw-total{font-weight:800;color:var(--text1);border-top:1px solid var(--border);padding-top:4px;margin-top:2px}

/* ═══ SKELETON LOADERS ═══ */
.skeleton{background:linear-gradient(90deg,var(--surface) 25%,var(--card-hover) 50%,var(--surface) 75%);background-size:200% 100%;animation:shimmer 1.5s infinite;border-radius:var(--r-sm)}
.skeleton-text{height:12px;width:80%;margin-bottom:8px}
.skeleton-card{height:80px;margin-bottom:10px}
.skeleton-kpi{height:60px}
@keyframes shimmer{0%{background-position:200% 0}100%{background-position:-200% 0}}

/* ═══ EMPTY STATES ═══ */
.empty-state{text-align:center;padding:40px 20px;color:var(--text3)}
.empty-state-icon{font-size:36px;margin-bottom:8px;opacity:.6}
.empty-state-title{font-size:14px;font-weight:700;color:var(--text2);margin-bottom:4px}
.empty-state-text{font-size:11px;margin-bottom:12px}

/* ═══ HELPBOX ═══ */
.helpbox{background:var(--accent-glow);border:1px solid rgba(34,197,94,.2);border-radius:var(--r-sm);padding:10px 12px;margin-bottom:12px;display:flex;align-items:flex-start;gap:8px}
.helpbox-icon{font-size:14px;flex-shrink:0}
.helpbox-text{font-size:10px;color:var(--text2);line-height:1.5}

/* ═══ TABS ═══ */
.tabbar{display:flex;gap:2px;padding:2px;background:var(--surface);border-radius:var(--r-sm);margin-bottom:12px}
.tab{flex:1;text-align:center;padding:8px 10px;border-radius:6px;font-size:10px;font-weight:700;cursor:pointer;color:var(--text3);transition:all var(--t-fast);user-select:none;white-space:nowrap}
.tab:hover{color:var(--text2);background:var(--card-hover)}
.tab-active{background:var(--card);color:var(--text1);box-shadow:var(--shadow-sm)}

/* ═══ MODAL ═══ */
.modal-overlay{position:fixed;inset:0;background:rgba(0,0,0,.6);backdrop-filter:blur(4px);display:flex;align-items:center;justify-content:center;z-index:var(--z-modal);animation:fadeIn var(--t-fast);padding:20px}
.modal{background:var(--card);border:1px solid var(--border);border-radius:var(--r-lg);padding:20px;width:440px;max-width:100%;max-height:85vh;overflow-y:auto;box-shadow:var(--shadow-modal);animation:slideUp var(--t-normal)}
.modal-title{font-size:15px;font-weight:900;margin-bottom:16px;display:flex;justify-content:space-between;align-items:center}
.modal-footer{display:flex;justify-content:flex-end;gap:8px;margin-top:16px;padding-top:12px;border-top:1px solid var(--border)}
@keyframes fadeIn{from{opacity:0}to{opacity:1}}
@keyframes slideUp{from{opacity:0;transform:translateY(12px)}to{opacity:1;transform:translateY(0)}}

/* ═══ SCROLLBAR ═══ */
::-webkit-scrollbar{width:6px;height:6px}
::-webkit-scrollbar-track{background:transparent}
::-webkit-scrollbar-thumb{background:var(--border2);border-radius:3px}
::-webkit-scrollbar-thumb:hover{background:var(--text3)}

/* ═══ NUMBER FORMATTING ═══ */
.amount-positive{color:var(--accent);font-weight:800}
.amount-positive::before{content:'+'}
.amount-negative{color:var(--red);font-weight:800}
.amount-negative::before{content:'−'}
.amount-zero{color:var(--text4);font-weight:600}

/* ═══ STATUS COLORS ═══ */
.status-open{color:#4B6380}.status-in_uitvoering{color:var(--blue)}.status-afgerond{color:var(--accent)}.status-overdue{color:var(--red)}.status-concept{color:var(--text3)}

/* ═══ LINK STYLE ═══ */
a,.link{color:var(--accent);text-decoration:none;cursor:pointer;transition:opacity var(--t-fast)}
a:hover,.link:hover{opacity:.75;text-decoration:underline}

/* ═══ CURSOR ═══ */
.cursor-pointer{cursor:pointer}
.cursor-grab{cursor:grab}
.cursor-grab:active{cursor:grabbing}

/* ═══ SELECTION ═══ */
::selection{background:var(--accent);color:#fff}

/* ═══ UTILITY ═══ */
.overflow-hidden{overflow:hidden}
.truncate{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.hidden{display:none!important}
.visible{display:block!important}