@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&display=swap');

:root {
    --primary-900: #0A1628;
    --primary-800: #0F2B46;
    --primary-700: #143A5C;
    --primary-600: #1A5276;
    --primary-500: #2171A0;
    --primary-400: #2E86C1;
    --primary-300: #5DADE2;
    --primary-200: #AED6F1;
    --primary-100: #D6EAF8;
    --primary-50: #EBF5FB;
    --accent-600: #D35400;
    --accent-500: #E67E22;
    --accent-400: #F39C12;
    --accent-300: #F5B041;
    --accent-100: #FDEBD0;
    --success-600: #1E8449;
    --success-500: #27AE60;
    --success-100: #D5F5E3;
    --danger-500: #E74C3C;
    --danger-100: #FADBD8;
    --gray-900: #1A1A2E;
    --gray-800: #2C3E50;
    --gray-700: #34495E;
    --gray-600: #5D6D7E;
    --gray-500: #7F8C8D;
    --gray-400: #95A5A6;
    --gray-300: #BDC3C7;
    --gray-200: #D5DBDB;
    --gray-100: #E8ECEF;
    --gray-50: #F4F6F9;
    --white: #FFFFFF;
    --shadow: 0 2px 12px rgba(0,0,0,0.08);
    --shadow-lg: 0 8px 30px rgba(0,0,0,0.12);
    --shadow-xl: 0 12px 48px rgba(0,0,0,0.16);
    --radius-sm: 8px;
    --radius: 12px;
    --radius-lg: 16px;
    --transition: all 0.3s cubic-bezier(0.4,0,0.2,1);
    --font: 'Inter',-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,sans-serif;
}

*,*::before,*::after{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-font-smoothing:antialiased}
body{font-family:var(--font);background:var(--gray-50);color:var(--gray-800);line-height:1.6;min-height:100vh;display:flex;flex-direction:column;overflow-x:hidden}
a{text-decoration:none;color:inherit;transition:var(--transition)}
img{max-width:100%;height:auto}
ul{list-style:none}

h1,h2,h3,h4{font-weight:700;line-height:1.3;color:var(--gray-900)}
h1{font-size:clamp(1.75rem,4vw,2.5rem)}
h2{font-size:clamp(1.5rem,3vw,2rem)}
h3{font-size:clamp(1.1rem,2.5vw,1.4rem)}
h4{font-size:1.1rem}

.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px}

/* ===== HEADER (стабильный, без скачков) ===== */
.header{
    background:var(--white);
    border-bottom:1px solid var(--gray-100);
    position:sticky;top:0;z-index:1000;
    height:68px;
}
.header-inner{display:flex;align-items:center;justify-content:space-between;height:68px}
.logo{display:flex;align-items:center;gap:10px;font-weight:800;font-size:1.25rem;color:var(--primary-800);flex-shrink:0}
.logo-icon{width:38px;height:38px;background:linear-gradient(135deg,var(--primary-600),var(--primary-400));border-radius:var(--radius-sm);display:flex;align-items:center;justify-content:center;color:var(--white);font-size:1.1rem}
.logo span{color:var(--accent-500)}

.nav{display:flex;align-items:center;gap:4px}
.mobile-toggle{display:none;background:none;border:none;font-size:1.4rem;cursor:pointer;color:var(--gray-700);padding:8px;line-height:1}

/* DROPDOWN — по клику, не по hover */
.nav-dropdown{position:relative}
.nav-dropdown-toggle{
    padding:8px 14px;border-radius:var(--radius-sm);font-size:0.875rem;font-weight:500;
    color:var(--gray-600);cursor:pointer;display:flex;align-items:center;gap:4px;
    background:none;border:none;font-family:var(--font);white-space:nowrap;
}
.nav-dropdown-toggle:hover{background:var(--primary-50);color:var(--primary-600)}
.nav-dropdown-menu{
    display:none;position:absolute;top:100%;left:0;margin-top:4px;
    background:var(--white);border:1px solid var(--gray-100);border-radius:var(--radius);
    box-shadow:var(--shadow-lg);min-width:220px;padding:6px;z-index:1001;
}
.nav-dropdown.open .nav-dropdown-menu{display:block}
.nav-dropdown-menu a{display:flex;align-items:center;gap:8px;padding:9px 12px;border-radius:6px;font-size:0.85rem;color:var(--gray-700)}
.nav-dropdown-menu a:hover,.nav-dropdown-menu a.active{background:var(--primary-50);color:var(--primary-600)}
.nav-dropdown-menu a.active{font-weight:600}
.menu-emoji{font-size:1rem;width:22px;text-align:center;flex-shrink:0}
.nav-divider{height:1px;background:var(--gray-100);margin:4px 6px}

/* ===== HERO (стабильный, фиксированная высота) ===== */
.hero{
    background:linear-gradient(135deg,var(--primary-900) 0%,var(--primary-700) 40%,var(--primary-500) 100%);
    color:var(--white);padding:60px 0 70px;overflow:hidden;position:relative;
}
.hero-content{position:relative;z-index:1;max-width:660px}
.hero-badge{
    display:inline-block;background:rgba(255,255,255,0.1);
    padding:6px 16px;border-radius:100px;font-size:0.82rem;font-weight:500;
    margin-bottom:20px;border:1px solid rgba(255,255,255,0.15);
}
.hero h1{color:var(--white);font-size:clamp(1.8rem,4.5vw,2.8rem);font-weight:800;margin-bottom:16px;line-height:1.15}
.hero p{font-size:1.05rem;opacity:0.85;margin-bottom:32px;line-height:1.7;max-width:560px}
.hero-stats{
    display:grid;grid-template-columns:repeat(3,auto);gap:40px;
    margin-top:40px;padding-top:28px;border-top:1px solid rgba(255,255,255,0.15);
    width:fit-content;
}
.hero-stat-value{font-size:1.8rem;font-weight:800;color:var(--accent-400)}
.hero-stat-label{font-size:0.8rem;opacity:0.6;margin-top:2px}

/* ===== BREADCRUMB ===== */
.breadcrumb{display:flex;align-items:center;gap:8px;font-size:0.85rem;color:var(--gray-500);flex-wrap:wrap;padding:0;margin-bottom:8px}
.breadcrumb a{color:rgba(255,255,255,0.8)}
.breadcrumb a:hover{text-decoration:underline}

/* ===== SECTIONS ===== */
.section{padding:72px 0}
.section-header{text-align:center;max-width:580px;margin:0 auto 44px}
.section-header p{color:var(--gray-500);margin-top:10px;font-size:1rem}
.section-alt{background:var(--white);border-top:1px solid var(--gray-100);border-bottom:1px solid var(--gray-100)}

.category-badge{display:inline-flex;align-items:center;gap:6px;padding:5px 14px;border-radius:100px;font-size:0.75rem;font-weight:700;text-transform:uppercase;letter-spacing:0.06em;margin-bottom:10px}
.badge-build{background:var(--primary-100);color:var(--primary-600)}
.badge-seller{background:#F3E5F5;color:#7B1FA2}

/* ===== CALC CARDS ===== */
.calc-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:20px}
.calc-card{
    background:var(--white);border-radius:var(--radius-lg);padding:28px;
    box-shadow:var(--shadow);border:1px solid var(--gray-100);
    transition:var(--transition);display:flex;flex-direction:column;
    position:relative;overflow:hidden;
}
.calc-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-lg);border-color:var(--primary-200)}
.calc-card-icon{width:48px;height:48px;border-radius:var(--radius);display:flex;align-items:center;justify-content:center;font-size:1.3rem;margin-bottom:16px}
.calc-card h3{margin-bottom:6px;font-size:1.05rem}
.calc-card p{color:var(--gray-500);font-size:0.875rem;margin-bottom:20px;flex:1;line-height:1.5}
.calc-card-link{display:inline-flex;align-items:center;gap:6px;font-weight:600;font-size:0.9rem;color:var(--primary-500)}
.calc-card-link:hover{color:var(--primary-600);gap:10px}
.calc-card.seller-card:hover{border-color:#CE93D8}
.calc-card.seller-card .calc-card-link{color:#7B1FA2}

.icon-oboi{background:#FFF3E0;color:#E65100}
.icon-laminat{background:#E8F5E9;color:#2E7D32}
.icon-plitka{background:#E3F2FD;color:#1565C0}
.icon-kraska{background:#F3E5F5;color:#7B1FA2}
.icon-kirpich{background:#FBE9E7;color:#BF360C}
.icon-beton{background:#ECEFF1;color:#37474F}
.icon-seller{background:#F3E5F5;color:#7B1FA2}
.icon-stukaturka{background:#FFF8E1;color:#F57F17}
.icon-styazhka{background:#E0F2F1;color:#00695C}
.icon-gazoblok{background:#FFF3E0;color:#E65100}
.icon-gipsokarton{background:#E8EAF6;color:#283593}

/* ===== CALC PAGE ===== */
.calc-page-header{background:linear-gradient(135deg,var(--primary-800),var(--primary-600));color:var(--white);padding:36px 0}
.calc-page-header h1{color:var(--white);margin-bottom:6px}
.calc-page-header p{opacity:0.85;font-size:1rem}
.calc-layout{display:grid;grid-template-columns:1fr 400px;gap:28px;padding:36px 0;align-items:start}

/* ===== CARDS ===== */
.card{background:var(--white);border-radius:var(--radius-lg);box-shadow:var(--shadow);border:1px solid var(--gray-100);overflow:hidden}
.card-header{padding:20px 24px;border-bottom:1px solid var(--gray-100);display:flex;align-items:center;gap:10px}
.card-header h3{font-size:1.05rem}
.card-header-icon{width:34px;height:34px;border-radius:var(--radius-sm);background:var(--primary-50);color:var(--primary-500);display:flex;align-items:center;justify-content:center;font-size:0.95rem;flex-shrink:0}
.card-body{padding:24px}
.card+.card{margin-top:20px}

/* ===== FORMS ===== */
.form-section{margin-bottom:24px}
.form-section:last-child{margin-bottom:0}
.form-section-title{font-size:0.75rem;font-weight:700;text-transform:uppercase;letter-spacing:0.08em;color:var(--gray-400);margin-bottom:14px;display:flex;align-items:center;gap:8px}
.form-section-title::after{content:'';flex:1;height:1px;background:var(--gray-100)}
.form-row{display:grid;grid-template-columns:1fr 1fr;gap:14px;margin-bottom:14px}
.form-row-3{grid-template-columns:1fr 1fr 1fr}
.form-row:last-child{margin-bottom:0}
.form-group{margin-bottom:14px}
.form-group:last-child{margin-bottom:0}
.form-group label{display:block;font-size:0.85rem;font-weight:600;color:var(--gray-700);margin-bottom:5px}
.form-group label .unit{font-weight:400;color:var(--gray-400);font-size:0.78rem}
.form-group .hint{font-size:0.78rem;color:var(--gray-400);margin-top:3px}
.input-wrap{position:relative}
.input-wrap .input-suffix{position:absolute;right:12px;top:50%;transform:translateY(-50%);font-size:0.82rem;color:var(--gray-400);pointer-events:none;font-weight:500}

input[type="number"],input[type="text"],select{
    width:100%;padding:10px 14px;border:2px solid var(--gray-200);border-radius:var(--radius-sm);
    font-size:0.9rem;font-family:var(--font);color:var(--gray-800);background:var(--white);
    transition:var(--transition);-moz-appearance:textfield;
}
input[type="number"]::-webkit-inner-spin-button,input[type="number"]::-webkit-outer-spin-button{-webkit-appearance:none;margin:0}
input[type="number"]:focus,input[type="text"]:focus,select:focus{outline:none;border-color:var(--primary-400);box-shadow:0 0 0 3px rgba(46,134,193,0.1)}
input.has-suffix{padding-right:48px}
select{cursor:pointer;appearance:none;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath d='M6 8L1 3h10z' fill='%237F8C8D'/%3E%3C/svg%3E");background-repeat:no-repeat;background-position:right 12px center;padding-right:32px}

/* ===== BUTTONS ===== */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:12px 24px;border-radius:var(--radius-sm);font-size:0.9rem;font-weight:600;font-family:var(--font);cursor:pointer;border:2px solid transparent;transition:var(--transition);white-space:nowrap}
.btn-primary{background:linear-gradient(135deg,var(--primary-600),var(--primary-400));color:var(--white);box-shadow:0 3px 10px rgba(26,82,118,0.25)}
.btn-primary:hover{box-shadow:0 5px 16px rgba(26,82,118,0.35);transform:translateY(-1px)}
.btn-accent{background:linear-gradient(135deg,var(--accent-600),var(--accent-500));color:var(--white);box-shadow:0 3px 10px rgba(211,84,0,0.25)}
.btn-accent:hover{box-shadow:0 5px 16px rgba(211,84,0,0.35);transform:translateY(-1px)}
.btn-outline{background:var(--white);color:var(--primary-600);border-color:var(--primary-300)}
.btn-outline:hover{background:var(--primary-50);border-color:var(--primary-400)}
.btn-success{background:linear-gradient(135deg,var(--success-600),var(--success-500));color:var(--white);box-shadow:0 3px 10px rgba(39,174,96,0.25)}
.btn-success:hover{box-shadow:0 5px 16px rgba(39,174,96,0.35);transform:translateY(-1px)}
.btn-sm{padding:8px 14px;font-size:0.82rem}
.btn-lg{padding:14px 32px;font-size:1rem}
.btn-block{width:100%}
.btn-group{display:flex;gap:10px;flex-wrap:wrap}

/* ===== RESULTS ===== */
.results-section{display:none}
.results-section.visible{display:block;animation:fadeInUp 0.4s ease}
.result-item{display:flex;justify-content:space-between;align-items:center;padding:12px 0;border-bottom:1px solid var(--gray-100)}
.result-item:last-child{border-bottom:none}
.result-label{font-size:0.875rem;color:var(--gray-600)}
.result-value{font-size:1rem;font-weight:700;color:var(--gray-900)}
.result-total{background:linear-gradient(135deg,var(--primary-800),var(--primary-600));color:var(--white);margin:16px -24px -24px;padding:20px 24px;display:flex;justify-content:space-between;align-items:center;border-radius:0 0 var(--radius-lg) var(--radius-lg)}
.result-total-label{font-size:0.95rem;font-weight:600;opacity:0.9}
.result-total-value{font-size:1.4rem;font-weight:800}

/* Seller result */
.result-big{text-align:center;padding:28px 16px}
.result-big-value{font-size:2.8rem;font-weight:800;color:var(--primary-700);line-height:1.2}
.result-big-unit{font-size:1rem;color:var(--gray-500);font-weight:500;margin-top:4px}
.result-big-label{font-size:0.85rem;color:var(--gray-400);margin-top:6px}
.results-grid{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin-top:16px}
.result-mini-card{background:var(--gray-50);border-radius:var(--radius-sm);padding:14px;text-align:center}
.result-mini-value{font-size:1.15rem;font-weight:700;color:var(--gray-800)}
.result-mini-label{font-size:0.78rem;color:var(--gray-500);margin-top:3px}

.tier-table{width:100%;border-collapse:collapse;font-size:0.85rem}
.tier-table th{text-align:left;padding:8px 12px;background:var(--gray-50);font-weight:600;color:var(--gray-600);font-size:0.78rem;text-transform:uppercase;letter-spacing:0.03em}
.tier-table td{padding:9px 12px;border-bottom:1px solid var(--gray-100)}
.tier-table tr.active-tier{background:var(--accent-100);font-weight:700}
.tier-table tr.active-tier td{color:var(--accent-600)}

/* ===== OPENINGS ===== */
.opening-item{background:var(--gray-50);border:1px solid var(--gray-200);border-radius:var(--radius-sm);padding:14px;margin-bottom:10px;position:relative}
.opening-item .form-row{margin-bottom:0}
.opening-remove{position:absolute;top:6px;right:6px;width:26px;height:26px;border:none;background:var(--danger-100);color:var(--danger-500);border-radius:50%;cursor:pointer;display:flex;align-items:center;justify-content:center;font-size:0.9rem;transition:var(--transition)}
.opening-remove:hover{background:var(--danger-500);color:var(--white)}
.add-opening-btn{display:flex;align-items:center;gap:8px;padding:10px 16px;background:none;border:2px dashed var(--gray-300);border-radius:var(--radius-sm);color:var(--gray-500);font-size:0.85rem;font-weight:600;font-family:var(--font);cursor:pointer;transition:var(--transition);width:100%;justify-content:center}
.add-opening-btn:hover{border-color:var(--primary-400);color:var(--primary-500);background:var(--primary-50)}

/* ===== MODAL ===== */
.modal-overlay{display:none;position:fixed;top:0;left:0;right:0;bottom:0;background:rgba(0,0,0,0.5);backdrop-filter:blur(4px);z-index:10000;align-items:center;justify-content:center;padding:20px}
.modal-overlay.active{display:flex}
.modal{background:var(--white);border-radius:var(--radius-lg);width:100%;max-width:820px;max-height:90vh;overflow-y:auto;box-shadow:var(--shadow-xl)}
.modal-header{padding:20px 24px;border-bottom:1px solid var(--gray-100);display:flex;align-items:center;justify-content:space-between;position:sticky;top:0;background:var(--white);z-index:1}
.modal-close{width:34px;height:34px;border:none;background:var(--gray-100);border-radius:50%;cursor:pointer;display:flex;align-items:center;justify-content:center;font-size:1.1rem;color:var(--gray-600);transition:var(--transition)}
.modal-close:hover{background:var(--danger-100);color:var(--danger-500)}
.modal-body{padding:24px}
.modal-footer{padding:16px 24px;border-top:1px solid var(--gray-100);display:flex;gap:10px;justify-content:flex-end;position:sticky;bottom:0;background:var(--white)}

/* ===== ПРОФЕССИОНАЛЬНАЯ СМЕТА / КП ===== */
.doc{
    font-family:'Inter',Arial,sans-serif;color:#222;line-height:1.5;
}
.doc-header{
    display:flex;justify-content:space-between;align-items:flex-start;
    padding-bottom:20px;margin-bottom:24px;
    border-bottom:3px solid var(--primary-700);
}
.doc-company{font-size:0.82rem;color:var(--gray-600);line-height:1.6}
.doc-company strong{font-size:1.1rem;color:var(--primary-800);display:block;margin-bottom:2px}
.doc-logo{font-size:1.3rem;font-weight:800;color:var(--primary-800);display:flex;align-items:center;gap:8px;margin-bottom:6px}
.doc-logo span{color:var(--accent-500)}
.doc-number{text-align:right;font-size:0.82rem;color:var(--gray-500);line-height:1.6}
.doc-number strong{font-size:0.9rem;color:var(--gray-800);display:block}

.doc-title{
    text-align:center;margin:24px 0;
    font-size:1.35rem;font-weight:800;color:var(--primary-800);
    text-transform:uppercase;letter-spacing:0.03em;
}

.doc-parties{
    display:grid;grid-template-columns:1fr 1fr;gap:20px;
    margin-bottom:24px;padding:16px 20px;
    background:var(--gray-50);border:1px solid var(--gray-200);border-radius:var(--radius-sm);
}
.doc-party label{font-size:0.72rem;text-transform:uppercase;letter-spacing:0.05em;color:var(--gray-400);font-weight:700}
.doc-party .party-value{font-size:0.9rem;font-weight:600;color:var(--gray-800);margin-top:2px;min-height:20px;border-bottom:1px solid var(--gray-300);padding-bottom:2px}

.doc-object{
    margin-bottom:20px;padding:12px 20px;
    background:var(--primary-50);border-left:4px solid var(--primary-500);border-radius:0 var(--radius-sm) var(--radius-sm) 0;
    font-size:0.85rem;
}
.doc-object strong{color:var(--primary-700)}

.doc-table{width:100%;border-collapse:collapse;margin-bottom:0;font-size:0.85rem}
.doc-table thead th{
    background:var(--primary-800);color:var(--white);padding:10px 12px;
    text-align:left;font-size:0.78rem;font-weight:600;text-transform:uppercase;letter-spacing:0.03em;
    white-space:nowrap;
}
.doc-table thead th:first-child{border-radius:var(--radius-sm) 0 0 0;width:36px;text-align:center}
.doc-table thead th:nth-child(3){width:50px}
.doc-table thead th:nth-child(4){width:70px;text-align:right}
.doc-table thead th:nth-child(5){width:80px;text-align:right}
.doc-table thead th:last-child{border-radius:0 var(--radius-sm) 0 0;text-align:right;width:100px}
.doc-table td{padding:10px 12px;border-bottom:1px solid var(--gray-200);vertical-align:top}
.doc-table td:first-child{text-align:center;color:var(--gray-500)}
.doc-table td:nth-child(4),.doc-table td:nth-child(5),.doc-table td:last-child{text-align:right;white-space:nowrap}
.doc-table .group-row td{
    background:var(--gray-50);font-weight:700;color:var(--primary-700);
    font-size:0.78rem;text-transform:uppercase;letter-spacing:0.04em;
    border-bottom:2px solid var(--primary-200);padding:8px 12px;
}
.doc-table .subtotal-row td{
    font-weight:700;color:var(--gray-700);background:var(--gray-50);
    border-top:1px solid var(--gray-300);font-size:0.85rem;
}
.doc-table .total-row td{
    font-weight:800;font-size:1.05rem;color:var(--primary-800);
    background:var(--primary-50);border-top:3px solid var(--primary-600);
    padding:14px 12px;
}

.doc-total-block{
    margin-top:20px;padding:16px 20px;
    background:linear-gradient(135deg,var(--primary-800),var(--primary-600));
    color:var(--white);border-radius:var(--radius-sm);
    display:flex;justify-content:space-between;align-items:center;
}
.doc-total-block .total-label{font-size:1rem;font-weight:600;opacity:0.9}
.doc-total-block .total-sum{font-size:1.5rem;font-weight:800}

.doc-notes{
    margin-top:20px;padding:12px 16px;
    background:var(--gray-50);border-radius:var(--radius-sm);
    font-size:0.8rem;color:var(--gray-500);line-height:1.6;
}
.doc-notes strong{color:var(--gray-700)}

.doc-signatures{
    display:grid;grid-template-columns:1fr 1fr;gap:40px;
    margin-top:40px;padding-top:20px;border-top:1px solid var(--gray-200);
}
.doc-sign-block{font-size:0.82rem}
.doc-sign-block .sign-role{font-weight:700;color:var(--gray-700);margin-bottom:24px}
.doc-sign-line{border-bottom:1px solid var(--gray-400);margin-bottom:4px;height:24px}
.doc-sign-hint{font-size:0.72rem;color:var(--gray-400)}

.doc-footer{
    margin-top:32px;padding-top:16px;border-top:1px solid var(--gray-200);
    display:flex;justify-content:space-between;align-items:center;
    font-size:0.78rem;color:var(--gray-400);
}

/* ===== FEATURES ===== */
.features-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:28px}
.feature-item{text-align:center;padding:20px}
.feature-icon{width:56px;height:56px;border-radius:var(--radius);display:flex;align-items:center;justify-content:center;font-size:1.3rem;margin:0 auto 14px;background:var(--primary-50);color:var(--primary-500)}
.feature-item h4{margin-bottom:6px;font-size:1rem}
.feature-item p{color:var(--gray-500);font-size:0.85rem}

/* ===== FOOTER ===== */
.footer{background:var(--primary-900);color:rgba(255,255,255,0.7);padding:40px 0 20px;margin-top:auto}
.footer-content{display:flex;justify-content:space-between;align-items:start;gap:36px;margin-bottom:28px;flex-wrap:wrap}
.footer-brand .logo{color:var(--white);margin-bottom:10px}
.footer-brand p{max-width:280px;font-size:0.85rem;line-height:1.6}
.footer-links h4{color:var(--white);font-size:0.9rem;margin-bottom:12px}
.footer-links a{display:block;padding:3px 0;font-size:0.85rem;color:rgba(255,255,255,0.5)}
.footer-links a:hover{color:var(--accent-400)}
.footer-bottom{border-top:1px solid rgba(255,255,255,0.1);padding-top:20px;display:flex;justify-content:space-between;font-size:0.8rem;flex-wrap:wrap;gap:10px}

.divider{border:none;border-top:1px solid var(--gray-100);margin:20px 0}
.alert{padding:14px 16px;border-radius:var(--radius-sm);font-size:0.85rem;display:flex;align-items:start;gap:10px;margin-bottom:16px}
.alert-info{background:var(--primary-50);color:var(--primary-700);border:1px solid var(--primary-200)}
.sidebar-sticky{position:sticky;top:88px}

.mt-2{margin-top:14px}.mt-3{margin-top:20px}.mb-3{margin-bottom:20px}

@keyframes fadeInUp{from{opacity:0;transform:translateY(16px)}to{opacity:1;transform:translateY(0)}}

/* ===== RESPONSIVE ===== */
@media(max-width:1024px){.calc-layout{grid-template-columns:1fr}}
@media(max-width:768px){
    .nav{display:none;position:absolute;top:68px;left:0;right:0;background:var(--white);flex-direction:column;padding:10px 16px;box-shadow:var(--shadow-lg);border-top:1px solid var(--gray-100);max-height:80vh;overflow-y:auto;z-index:999}
    .nav.active{display:flex}
    .mobile-toggle{display:block}
    .nav-dropdown{width:100%}
    .nav-dropdown-toggle{width:100%;justify-content:space-between;padding:10px 14px}
    .nav-dropdown-menu{position:static;box-shadow:none;border:none;padding:0 0 6px 10px;min-width:auto}
    .hero{padding:40px 0 50px}
    .hero-stats{grid-template-columns:repeat(3,1fr);gap:16px}
    .form-row,.form-row-3{grid-template-columns:1fr}
    .calc-grid{grid-template-columns:1fr}
    .section{padding:40px 0}
    .btn-group{flex-direction:column}
    .footer-content{flex-direction:column}
    .result-total{flex-direction:column;text-align:center;gap:6px}
    .results-grid{grid-template-columns:1fr 1fr}
    .doc-parties{grid-template-columns:1fr}
    .doc-signatures{grid-template-columns:1fr;gap:24px}
    .doc-header{flex-direction:column;gap:12px}
    .doc-number{text-align:left}
}

@media print{
    body{background:#fff}
    .header,.footer,.breadcrumb,.btn,.no-print{display:none!important}
    .card{box-shadow:none;border:1px solid #ddd}
    .results-section{display:block!important}
    .doc{font-size:12px}
    .doc-total-block{-webkit-print-color-adjust:exact;print-color-adjust:exact}
}