/* ==========================================================================
   BREATHE CLINIC GUWAHATI - PREMIUM DESIGN SYSTEM & STYLESHEET
   ========================================================================== */

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

/* Design System Variables */
:root {
    --primary-hue: 174;
    --primary: hsl(var(--primary-hue), 85%, 35%);
    --primary-light: hsl(var(--primary-hue), 85%, 45%);
    --primary-dark: hsl(var(--primary-hue), 90%, 25%);
    --secondary-hue: 160;
    --secondary: hsl(var(--secondary-hue), 84%, 38%);
    --secondary-light: hsl(var(--secondary-hue), 80%, 48%);
    --accent: #f43f5e;
    --accent-glow: rgba(244, 63, 94, 0.15);
    --bg-main: hsl(180, 20%, 98%);
    --bg-card: #ffffff;
    --bg-glass: rgba(255, 255, 255, 0.7);
    --border-glass: rgba(255, 255, 255, 0.4);
    --text-main: #1e293b;
    --text-muted: #64748b;
    --text-inverse: #ffffff;
    --card-shadow: 0 10px 30px -10px rgba(13, 148, 136, 0.08);
    --hover-shadow: 0 20px 40px -15px rgba(13, 148, 136, 0.15);
    --glass-shadow: 0 8px 32px 0 rgba(13, 148, 136, 0.04);
    --radius-sm: 8px;
    --radius-md: 16px;
    --radius-lg: 24px;
    --radius-full: 9999px;
    --font-heading: 'Outfit', sans-serif;
    --font-body: 'Catamaran', sans-serif;
    --transition-smooth: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
    --transition-fast: all 0.2s ease;
}
[data-theme="dark"] {
    --bg-main: hsl(222, 47%, 9%);
    --bg-card: hsl(223, 47%, 14%);
    --bg-glass: rgba(15, 23, 42, 0.6);
    --border-glass: rgba(255, 255, 255, 0.05);
    --text-main: #f1f5f9;
    --text-muted: #94a3b8;
    --text-inverse: #0f172a;
    --card-shadow: 0 10px 30px -10px rgba(0, 0, 0, 0.3);
    --hover-shadow: 0 20px 40px -15px rgba(13, 148, 136, 0.25);
    --glass-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.2);
    --primary: hsl(var(--primary-hue), 75%, 45%);
    --primary-light: hsl(var(--primary-hue), 80%, 55%);
    --primary-dark: hsl(var(--primary-hue), 70%, 35%);
}
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
body { font-family: var(--font-body); background-color: var(--bg-main); color: var(--text-main); line-height: 1.6; overflow-x: hidden; transition: background-color 0.3s ease, color 0.3s ease; }
h1,h2,h3,h4,h5,h6 { font-family: var(--font-heading); font-weight: 700; color: var(--text-main); line-height: 1.25; }
a { color: var(--primary); text-decoration: none; transition: var(--transition-fast); }
a:hover { color: var(--primary-light); }
.container { width: 100%; max-width: 1200px; margin: 0 auto; padding: 0 24px; }
.section { padding: 100px 0; position: relative; }
.glass-card { background: var(--bg-glass); backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px); border: 1px solid var(--border-glass); box-shadow: var(--glass-shadow); border-radius: var(--radius-md); transition: var(--transition-smooth); }
.glass-card:hover { transform: translateY(-5px); box-shadow: var(--hover-shadow); border-color: rgba(13, 148, 136, 0.2); }
.badge { display: inline-block; padding: 6px 16px; background: rgba(13, 148, 136, 0.1); color: var(--primary); font-family: var(--font-heading); font-size: 0.85rem; font-weight: 600; text-transform: uppercase; letter-spacing: 1px; border-radius: var(--radius-full); margin-bottom: 16px; }
.section-header { text-align: center; max-width: 650px; margin: 0 auto 60px; }
.section-header h2 { font-size: 2.5rem; margin-bottom: 16px; background: linear-gradient(135deg, var(--text-main) 30%, var(--primary) 100%); -webkit-background-clip: text; -webkit-text-fill-color: transparent; }
.section-header p { color: var(--text-muted); font-size: 1.1rem; }
.btn { display: inline-flex; align-items: center; justify-content: center; padding: 14px 28px; font-family: var(--font-heading); font-size: 0.95rem; font-weight: 600; border-radius: var(--radius-full); cursor: pointer; transition: var(--transition-smooth); border: none; gap: 8px; }
.btn-primary { background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%); color: #ffffff; box-shadow: 0 4px 15px rgba(13, 148, 136, 0.3); }
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 8px 25px rgba(13, 148, 136, 0.4); color: #ffffff; }
.btn-secondary { background: var(--bg-card); color: var(--text-main); border: 1px solid var(--border-glass); box-shadow: var(--card-shadow); }
.btn-secondary:hover { background: var(--primary); color: #ffffff !important; border-color: var(--primary); transform: translateY(-2px); }
header { position: sticky; top: 0; z-index: 99; transition: var(--transition-fast); }
.navbar-container { padding: 16px 0; background: var(--bg-glass); backdrop-filter: blur(20px); -webkit-backdrop-filter: blur(20px); border-bottom: 1px solid var(--border-glass); box-shadow: var(--glass-shadow); }
.navbar-inner { display: flex; justify-content: space-between; align-items: center; }
.nav-links { display: flex; list-style: none; gap: 32px; align-items: center; }
.nav-link-item { font-family: var(--font-heading); font-weight: 500; color: var(--text-main); font-size: 0.95rem; position: relative; padding: 8px 0; }
.nav-link-item::after { content: ''; position: absolute; bottom: 0; left: 50%; width: 0; height: 2px; background: var(--primary); transition: var(--transition-smooth); }
.nav-link-item:hover { color: var(--primary); }
.nav-link-item:hover::after { width: 100%; left: 0; }
footer { background: #0f172a; color: #94a3b8; padding: 80px 0 30px; border-top: 1px solid rgba(255,255,255,0.05); }
.footer-col h4 { color: #ffffff; font-size: 1.1rem; margin-bottom: 24px; position: relative; padding-bottom: 8px; }
.footer-col h4::after { content: ''; position: absolute; bottom: 0; left: 0; width: 30px; height: 2px; background: var(--primary); }
.footer-links { list-style: none; display: flex; flex-direction: column; gap: 12px; }
.footer-links a { color: #94a3b8; font-size: 0.9rem; }
.footer-links a:hover { color: var(--primary); padding-left: 4px; }
.fade-in { opacity: 0; transform: translateY(20px); transition: opacity 0.6s ease, transform 0.6s ease; }
.fade-in.visible { opacity: 1; transform: translateY(0); }
@media (max-width: 768px) { .section { padding: 60px 0; } .section-header h2 { font-size: 2rem; } }
@media (max-width: 480px) { .section-header h2 { font-size: 1.6rem; } .btn { padding: 12px 20px; } }
.dept-card{background:var(--bg-card);border:1px solid rgba(13,148,136,0.1);border-top:4px solid var(--primary);border-radius:var(--radius-md);padding:28px 22px;height:100%;transition:var(--transition-smooth);display:flex;flex-direction:column;}
.dept-card:hover{transform:translateY(-6px);box-shadow:var(--hover-shadow);}
.dept-card .dept-icon{width:56px;height:56px;background:rgba(13,148,136,0.08);border-radius:var(--radius-sm);display:flex;align-items:center;justify-content:center;margin-bottom:16px;font-size:26px;}
.dept-card h5{font-size:1rem;font-weight:700;color:var(--text-main);margin-bottom:8px;}
.dept-card p{font-size:0.85rem;color:var(--text-muted);line-height:1.6;flex-grow:1;margin-bottom:16px;}
.dept-card .dept-btn{display:inline-block;background:var(--primary);color:#fff;font-size:0.8rem;font-weight:600;padding:8px 18px;border-radius:var(--radius-full);text-decoration:none;transition:var(--transition-fast);align-self:flex-start;}
.dept-card .dept-btn:hover{background:var(--primary-dark);color:#fff;}
.service-card{background:var(--bg-card);border:1px solid rgba(13,148,136,0.1);border-radius:var(--radius-md);padding:28px 22px;transition:var(--transition-smooth);display:flex;flex-direction:column;align-items:center;text-align:center;}
.service-card:hover{transform:translateY(-4px);box-shadow:var(--hover-shadow);}
.form-control,.form-select{font-family:var(--font-body);font-size:14px;border:1.5px solid rgba(13,148,136,0.2);border-radius:var(--radius-sm);padding:12px 16px;background:var(--bg-card);color:var(--text-main);transition:var(--transition-fast);}
.form-control:focus,.form-select:focus{border-color:var(--primary);box-shadow:0 0 0 3px rgba(13,148,136,0.12);outline:none;}
.whatsapp-cta{position:fixed;bottom:80px;right:20px;z-index:999;width:50px;height:50px;border-radius:50%;box-shadow:0 4px 20px rgba(37,211,102,0.4);transition:var(--transition-smooth);}
.whatsapp-cta:hover{transform:scale(1.1);}
.whatsapp-cta img{width:50px;height:50px;border-radius:50%;}