:root {
    --primary: #0f2b4a;
    --primary-light: #1a3f6b;
    --secondary: #2563eb;
    --accent: #d4a537;
    --accent-light: #e8c15a;
    --dark: #0a1628;
    --gray-50: #f8fafc;
    --gray-100: #f1f5f9;
    --gray-200: #e2e8f0;
    --gray-300: #cbd5e1;
    --gray-500: #64748b;
    --gray-700: #334155;
    --gray-900: #0f172a;
    --white: #ffffff;
    --success: #16a34a;
    --danger: #dc2626;
    --warning: #f59e0b;
    --radius: 12px;
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.08);
    --shadow-md: 0 4px 16px rgba(0,0,0,0.1);
    --shadow-lg: 0 10px 40px rgba(0,0,0,0.12);
    --shadow-xl: 0 20px 60px rgba(0,0,0,0.15);
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}
* { margin: 0; padding: 0; box-sizing: border-box; }
body {
    font-family: "Inter", -apple-system, BlinkMacSystemFont, sans-serif;
    background-color: var(--gray-50);
    color: var(--gray-700);
    line-height: 1.7;
    padding-top: 80px;
    -webkit-font-smoothing: antialiased;
}
.navbar-brand img { height: 55px; transition: var(--transition); }
.navbar-brand img:hover { transform: scale(1.05); }
.main-nav {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
    box-shadow: 0 4px 20px rgba(0,0,0,0.15);
    padding: 0.6rem 0;
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 1050;
    backdrop-filter: blur(10px);
}
.main-nav .nav-link {
    color: rgba(255,255,255,0.85) !important;
    font-weight: 500;
    font-size: 0.92rem;
    padding: 0.5rem 1rem !important;
    border-radius: 8px;
    transition: var(--transition);
    position: relative;
    letter-spacing: 0.01em;
}
.main-nav .nav-link:hover, .main-nav .nav-link:focus {
    color: var(--white) !important;
    background: rgba(255,255,255,0.12);
    transform: translateY(-1px);
}
.main-nav .nav-link i { margin-right: 5px; font-size: 0.85rem; }
.nav-cta {
    background: linear-gradient(135deg, var(--accent) 0%, var(--accent-light) 100%) !important;
    color: var(--primary) !important;
    font-weight: 600 !important;
    padding: 0.5rem 1.2rem !important;
    border-radius: 8px !important;
    box-shadow: 0 2px 8px rgba(212,165,55,0.3);
}
.nav-cta:hover {
    transform: translateY(-2px) !important;
    box-shadow: 0 4px 16px rgba(212,165,55,0.4) !important;
    background: linear-gradient(135deg, var(--accent-light) 0%, var(--accent) 100%) !important;
}
.navbar-toggler { border: 2px solid rgba(255,255,255,0.3); padding: 0.4rem 0.65rem; border-radius: 8px; }
.navbar-toggler:focus { box-shadow: 0 0 0 3px rgba(212,165,55,0.4); }
.navbar-toggler-icon { filter: brightness(0) invert(1); }
.container-page {
    max-width: 1000px;
    margin: 40px auto;
    padding: 48px;
    background-color: var(--white);
    border-radius: var(--radius);
    box-shadow: var(--shadow-md);
}
.container-page form { max-width: 600px; margin-left: auto; margin-right: auto; }
h1, h2, h3, h4 { font-family: "Montserrat", sans-serif; color: var(--primary); line-height: 1.3; }
h2 { font-size: 2rem; font-weight: 700; margin-bottom: 24px; position: relative; display: inline-block; }
h2::after { content: ""; position: absolute; bottom: -8px; left: 0; width: 60px; height: 4px; background: linear-gradient(90deg, var(--accent), var(--accent-light)); border-radius: 2px; }
h3 { font-size: 1.4rem; font-weight: 700; margin-top: 32px; margin-bottom: 16px; }
p { margin-bottom: 16px; line-height: 1.8; }
.form-group { margin-bottom: 24px; }
label { display: block; font-weight: 600; margin-bottom: 8px; color: var(--gray-700); font-size: 0.95rem; }
input[type="text"], input[type="email"], input[type="tel"], input[type="password"], input[type="file"], textarea, select {
    width: 100%; padding: 12px 16px; border: 2px solid var(--gray-200); border-radius: 10px; font-size: 1rem;
    transition: var(--transition); font-family: "Inter", sans-serif; background: var(--white); color: var(--gray-900);
}
input:focus, textarea:focus, select:focus { outline: none; border-color: var(--secondary); box-shadow: 0 0 0 4px rgba(37,99,235,0.1); }
textarea { resize: vertical; min-height: 130px; }
input[type="submit"], .btn-primary-custom, button[type="submit"] {
    background: linear-gradient(135deg, var(--secondary) 0%, var(--primary-light) 100%);
    color: var(--white); padding: 14px 32px; border: none; border-radius: 10px; font-size: 1rem;
    font-weight: 600; cursor: pointer; transition: var(--transition); box-shadow: 0 4px 14px rgba(37,99,235,0.25);
    font-family: "Inter", sans-serif;
}
input[type="submit"]:hover, .btn-primary-custom:hover, button[type="submit"]:hover { transform: translateY(-2px); box-shadow: 0 8px 24px rgba(37,99,235,0.35); }
.container-page ul { list-style: none; padding-left: 0; }
.container-page ul li { padding: 14px 0 14px 32px; position: relative; border-bottom: 1px solid var(--gray-100); }
.container-page ul li::before { content: "\2713"; position: absolute; left: 0; color: var(--accent); font-weight: bold; font-size: 1.2rem; }
.container-page ul li:last-child { border-bottom: none; }
.alert-success, .success { background-color: #dcfce7; border-left: 4px solid var(--success); color: #166534; padding: 16px 20px; border-radius: 10px; margin: 20px 0; font-weight: 500; }
.alert-danger, .error { background-color: #fef2f2; border-left: 4px solid var(--danger); color: #991b1b; padding: 16px 20px; border-radius: 10px; margin: 20px 0; font-weight: 500; }
.address-link { color: white; text-decoration: none; transition: var(--transition); display: inline-block; }
.address-link:hover, .address-link:focus { opacity: 0.85; color: white; text-decoration: none; }
footer { background: linear-gradient(135deg, var(--dark) 0%, var(--primary) 100%); color: var(--white); padding: 48px 20px 32px; margin-top: 60px; }
.card-hover { transition: var(--transition); border: 1px solid var(--gray-200); }
.card-hover:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); border-color: var(--accent); }
.gradient-bar { height: 4px; background: linear-gradient(90deg, var(--accent), var(--secondary), var(--accent)); border-radius: 2px; }
@media (max-width: 991px) {
    body { padding-top: 76px; }
    .navbar-collapse { background: var(--primary); padding: 1rem; border-radius: 0 0 12px 12px; margin-top: 0.5rem; box-shadow: var(--shadow-lg); }
    .main-nav .nav-link { padding: 0.7rem 1rem !important; }
}
@media (max-width: 768px) { .container-page { padding: 28px 20px; margin: 20px 12px; } h2 { font-size: 1.6rem; } }
[data-aos] { transition-duration: 600ms; }

.shingle-section { margin-bottom: 48px; }
.shingle-section-header { background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%); color: white; padding: 20px 28px; border-radius: var(--radius); margin-bottom: 16px; font-family: Montserrat, sans-serif; font-size: 1.15rem; font-weight: 700; display: flex; align-items: center; gap: 12px; }
.shingle-desc { color: var(--gray-500); margin-bottom: 24px; padding: 0 4px; line-height: 1.8; font-size: 0.95rem; }
.shingle-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); gap: 16px; }
.shingle-item { text-align: center; background: var(--white); border-radius: var(--radius); padding: 14px; border: 1px solid var(--gray-200); transition: var(--transition); cursor: default; }
.shingle-item:hover { box-shadow: var(--shadow-md); transform: translateY(-4px); border-color: var(--accent); }
.shingle-swatch { width: 100%; height: 120px; border-radius: 8px; margin-bottom: 10px; box-shadow: 0 2px 6px rgba(0,0,0,0.12); overflow: hidden; }
.shingle-swatch img { width: 100%; height: 100%; object-fit: cover; display: block; border-radius: 8px; }
.shingle-name { font-weight: 600; color: var(--primary); font-size: 0.85rem; }
.shingle-badge { display: inline-block; background: var(--accent); color: var(--primary); font-size: 0.7rem; font-weight: 700; padding: 2px 8px; border-radius: 4px; margin-bottom: 6px; }
.shingle-links { display: flex; gap: 12px; margin-bottom: 20px; flex-wrap: wrap; }
.shingle-link { display: inline-flex; align-items: center; gap: 6px; padding: 8px 18px; border-radius: 8px; text-decoration: none; font-weight: 600; font-size: 0.88rem; transition: var(--transition); }
.shingle-link-design { background: linear-gradient(135deg, var(--accent), var(--accent-light)); color: var(--primary); }
.shingle-link-design:hover { transform: translateY(-2px); box-shadow: 0 4px 12px rgba(212,165,55,0.3); }
.shingle-link-product { background: var(--white); color: var(--primary); border: 2px solid var(--gray-200); }
.shingle-link-product:hover { border-color: var(--accent); transform: translateY(-2px); }