:root {
    --bg-dark: #09090b;
    --panel-bg: rgba(24, 24, 27, 0.6);
    --panel-border: rgba(255, 255, 255, 0.08);
    --text-main: #f4f4f5;
    --text-muted: #a1a1aa;
    --accent-blue: #3b82f6;
    --accent-glow: rgba(59, 130, 246, 0.5);
    --accent-purple: #8b5cf6;
    --accent-green: #10b981;
    --info-cyan: #06b6d4;
    --error-red: #ef4444;
    --input-bg: rgba(0, 0, 0, 0.3);
    --card-bg: rgba(0, 0, 0, 0.3);
}

body.light-theme {
    --bg-dark: #f1f5f9;
    --panel-bg: rgba(255, 255, 255, 0.85);
    --panel-border: rgba(0, 0, 0, 0.1);
    --text-main: #0f172a;
    --text-muted: #475569;
    --accent-glow: rgba(59, 130, 246, 0.15);
    --input-bg: #ffffff;
    --card-bg: #ffffff;
}

* { margin: 0; padding: 0; box-sizing: border-box; font-family: 'Inter', sans-serif; }
body { background-color: var(--bg-dark); color: var(--text-main); min-height: 100vh; overflow-x: hidden;}

/* ... Modal ... */
.modal-overlay {
    position: fixed; top: 0; left: 0; right: 0; bottom: 0;
    background: rgba(0, 0, 0, 0.7); backdrop-filter: blur(8px);
    z-index: 100; display: flex; justify-content: center; align-items: flex-start; padding-top: 5vh;
    opacity: 0; pointer-events: none; transition: opacity 0.3s ease;
}
.modal-overlay.active { opacity: 1; pointer-events: all; }
.modal-content {
    width: 100%; max-width: 600px;
    transform: translateY(-20px); transition: transform 0.3s ease; max-height: 90vh; overflow-y: auto;
}
.modal-xl { max-width: 1000px !important; }
.modal-overlay.active .modal-content { transform: translateY(0); }

.tabs { display: flex; gap: 1rem; border-bottom: 1px solid var(--panel-border); margin-bottom: 1.5rem; }
.tab-btn { background: none; border: none; color: var(--text-muted); padding: 0.8rem 1rem; font-size: 1rem; font-weight: 500; cursor: pointer; border-bottom: 2px solid transparent; transition: all 0.2s; }
.tab-btn:hover { color: var(--text-main); }
.tab-btn.active { color: var(--accent-blue); border-bottom-color: var(--accent-blue); }
.modal-grid { display: grid; grid-template-columns: 1fr 1.3fr; gap: 2rem; margin-bottom: 2rem; }
.checkbox-group { display: flex; gap: 1rem; flex-wrap: wrap; margin-top: 0.5rem; }
.checkbox-group label { display: flex; align-items: center; gap: 0.5rem; color: var(--text-main); cursor: pointer; }

.config-fieldset { border: 1px solid var(--panel-border); border-radius: 12px; padding: 1.5rem; margin-bottom: 1.5rem; }
.config-fieldset legend { font-weight: 600; font-family: 'Outfit'; color: var(--accent-blue); padding: 0 0.5rem; }

.material-list-section h3, .material-form-section h3, .subsection-title { font-size: 1.1rem; border-bottom: 1px solid var(--panel-border); padding-bottom: 0.8rem; margin-bottom: 1rem; color: var(--text-muted); font-weight: 500; }
.material-list { display: flex; flex-direction: column; gap: 0.5rem; max-height: 480px; overflow-y: auto; padding-right: 0.5rem; }
.material-list::-webkit-scrollbar { width: 6px; }
.material-list::-webkit-scrollbar-track { background: rgba(0,0,0,0.2); border-radius: 10px; }
.material-list::-webkit-scrollbar-thumb { background: var(--panel-border); border-radius: 10px; }
.mat-item { background: var(--card-bg); border: 1px solid var(--panel-border); padding: 0.8rem; border-radius: 10px; display: flex; justify-content: space-between; align-items: center; transition: border-color 0.2s; }
.mat-item:hover { border-color: var(--accent-blue); }
.mat-item-info { display: flex; flex-direction: column; gap: 0.2rem; }
.mat-item-info strong { font-size: 0.95rem; color: var(--text-main); }
.mat-item-info span { font-size: 0.8rem; color: var(--text-muted); }
.mat-item-actions { display: flex; gap: 0.5rem; }
.btn-icon { background: var(--panel-border); border: 1px solid var(--panel-border); color: var(--text-main); cursor: pointer; padding: 0.4rem; border-radius: 6px; display: flex; align-items: center; justify-content: center; transition: all 0.2s; }
.btn-icon:hover { background: rgba(255,255,255,0.2); }
.btn-icon.del:hover { background: rgba(239, 68, 68, 0.2); color: var(--error-red); border-color: rgba(239, 68, 68, 0.5); }

/* Layout Linear Global */
.app-container { padding: 2rem max(2rem, calc((100vw - 1300px) / 2)); z-index: 10; position: relative;}
.header-inner { display: flex; justify-content: space-between; align-items: center; margin-bottom: 2.5rem; }
.db-btn { padding: 0.6rem 1.2rem; font-size: 0.9rem; flex: 0; white-space: nowrap; }

.logo-title { font-family: 'Outfit', sans-serif; font-size: 2.3rem; font-weight: 700; letter-spacing: -1px; }
.logo-title span { color: var(--accent-blue); background: linear-gradient(to right, var(--accent-blue), var(--accent-purple)); -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent; }
.subtitle { color: var(--text-muted); font-size: 1rem; margin-top: 0.3rem; }

.grid { display: grid; grid-template-columns: 1.5fr 1fr; gap: 2.5rem; }
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 1.5rem; }
.grid-3 { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 1rem; }

@media (max-width: 1000px) {
    .grid, .grid-2 { grid-template-columns: 1fr; }
    .header-inner { flex-direction: column; align-items: flex-start; gap: 1rem; }
}

.glass-panel {
    background: var(--panel-bg); backdrop-filter: blur(16px); -webkit-backdrop-filter: blur(16px);
    border: 1px solid var(--panel-border); border-radius: 16px;
    padding: 2.2rem; box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
}
.glow-border { position: relative; }
.glow-border::before {
    content: ''; position: absolute; top: -1px; left: -1px; right: -1px; bottom: -1px;
    border-radius: 17px; background: linear-gradient(45deg, var(--accent-blue), var(--accent-purple));
    z-index: -1; opacity: 0.3; transition: opacity 0.3s ease;
}

/* Linear Builder Step Stylings */
.step-title { display: flex; align-items: center; gap: 0.8rem; font-family: 'Outfit'; font-size: 1.3rem; margin-bottom: 1.8rem; color: var(--text-main); }
.step-badge {
    background: var(--accent-blue); color: #fff; width: 32px; height: 32px;
    display: flex; align-items: center; justify-content: center; border-radius: 50%;
    font-size: 1rem; font-weight: bold; box-shadow: 0 0 15px var(--accent-glow);
}

.form-group { margin-bottom: 1.2rem; }
.input-block { display: flex; flex-direction: column; gap: 0.4rem; }
label { font-size: 0.85rem; font-weight: 500; color: var(--text-muted); }
input, select { background: var(--input-bg); border: 1px solid var(--panel-border); color: var(--text-main); padding: 0.75rem 1rem; border-radius: 8px; font-size: 0.95rem; outline: none; transition: border-color 0.2s ease;}
input:focus, select:focus { border-color: var(--accent-blue); }
input:disabled, select:disabled { opacity: 0.5; cursor: not-allowed; }
.help-text { font-size: 0.75rem; color: #71717a; }

/* Process Stack Architecture */
.process-stack { display: flex; flex-direction: column; gap: 1rem; margin-bottom: 2rem; }
.process-card {
    background: var(--card-bg); border: 1px solid var(--panel-border); border-left: 4px solid var(--accent-blue);
    border-radius: 8px; padding: 1.2rem; position: relative;
    display: flex; flex-direction: column; gap: 0.8rem;
    animation: slideDown 0.3s ease;
}
@keyframes slideDown { 0% { opacity:0; transform: translateY(-10px);} 100%{opacity:1; transform:translateY(0);} }

.card-header { display: flex; justify-content: space-between; align-items: center; font-family: 'Outfit'; font-weight: 600; font-size: 1rem; color: var(--text-main); border-bottom: 1px solid var(--panel-border); padding-bottom: 0.5rem;}
.card-header .proc-tag { font-size: 0.75rem; background: var(--panel-border); padding: 0.2rem 0.5rem; border-radius: 10px; font-weight: normal; margin-left: 0.5rem;}
.card-meta { display: flex; gap: 0.8rem; margin-top: 0.3rem;}
.btn-remove-proc { background: none; border: none; font-size: 1rem; color: var(--text-muted); cursor: pointer; }
.btn-remove-proc:hover { color: var(--error-red); }

.add-process-bar { display: flex; gap: 1rem; align-items: center; background: rgba(255,255,255,0.02); padding: 1rem; border-radius: 8px; border: 1px dashed var(--panel-border); }
.add-process-bar select { flex: 1; }
.add-btn { flex: 0; white-space: nowrap; }

/* Right Panel Ticket */
.live-results { display: flex; flex-direction: column; gap: 1rem; }
.result-row { display: flex; justify-content: space-between; align-items: center; font-size: 0.95rem; }
.result-value { font-weight: 600; font-variant-numeric: tabular-nums; }
.divider { height: 1px; background: var(--panel-border); }
.intermediate { color: var(--text-muted); }

.total { font-size: 1.2rem; }
.total .highlight { font-family: 'Outfit'; font-size: 2.2rem; color: var(--text-main); text-shadow: 0 0 20px var(--accent-glow); }
.info-color { color: var(--info-cyan); }
.profit-indicator { text-align: right; font-size: 0.8rem; color: var(--text-muted); }
.profit-indicator strong { color: var(--text-main); }

.action-buttons { display: flex; gap: 1rem; margin-top: 2rem; }
.form-actions { margin-top: 1rem; }
.btn { flex: 1; padding: 0.8rem 1rem; border-radius: 8px; font-weight: 600; font-size: 0.95rem; cursor: pointer; transition: all 0.2s ease; border: none; }
.btn-primary { background: var(--text-main); color: var(--bg-dark); }
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 5px 15px var(--accent-glow); }
.btn-secondary { background: var(--panel-border); color: var(--text-main); border: 1px solid var(--panel-border); }
.btn-secondary:hover { background: rgba(255, 255, 255, 0.1); }

.background-elements { position: fixed; top: 0; left: 0; right: 0; bottom: 0; z-index: -1; overflow: hidden; }
.blob { position: absolute; filter: blur(80px); opacity: 0.4; border-radius: 50%; animation: float 20s infinite ease-in-out alternate; }
.blob-1 { width: 400px; height: 400px; background: radial-gradient(circle, var(--accent-purple), transparent 70%); top: -100px; left: -100px; }
.blob-2 { width: 500px; height: 500px; background: radial-gradient(circle, var(--accent-blue), transparent 70%); bottom: -150px; right: -100px; animation-delay: -5s; }
@keyframes float { 0% { transform: translate(0, 0); } 100% { transform: translate(100px, 50px); } }
.bounce { animation: pop 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275); }
@keyframes pop { 0% { transform: scale(0.95); opacity: 0.8; } 50% { transform: scale(1.02); } 100% { transform: scale(1); opacity: 1; } }