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

:root {
  --primary: #2563EB;
  --primary-dark: #1d4ed8;
  --accent: #7C3AED;
  --accent-light: #a78bfa;
  --bg: #F0F4FF;
  --bg-card: rgba(255,255,255,0.75);
  --bg-card-border: rgba(255,255,255,0.9);
  --text: #0f172a;
  --text-muted: #64748b;
  --input-bg: #ffffff;
  --input-border: #cbd5e1;
  --shadow: 0 8px 32px rgba(37,99,235,0.12);
  --shadow-lg: 0 20px 60px rgba(37,99,235,0.18);
  --radius: 16px;
  --radius-sm: 10px;
  --glass: blur(16px);
  --nav-bg: rgba(255,255,255,0.85);
  --footer-bg: #0f172a;
  --hero-grad: linear-gradient(135deg,#1e3a8a 0%,#2563eb 40%,#7c3aed 100%);
  --transition: all 0.25s cubic-bezier(0.4,0,0.2,1);
}

[data-theme="dark"] {
  --bg: #0f172a;
  --bg-card: rgba(30,41,59,0.75);
  --bg-card-border: rgba(51,65,85,0.8);
  --text: #f1f5f9;
  --text-muted: #94a3b8;
  --input-bg: #1e293b;
  --input-border: #334155;
  --shadow: 0 8px 32px rgba(0,0,0,0.4);
  --shadow-lg: 0 20px 60px rgba(0,0,0,0.5);
  --nav-bg: rgba(15,23,42,0.92);
}

*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;font-size:16px}
body{font-family:'Inter',sans-serif;background:var(--bg);color:var(--text);transition:var(--transition);overflow-x:hidden;line-height:1.6}

/* NAV */
nav{position:fixed;top:0;left:0;right:0;z-index:1000;background:var(--nav-bg);backdrop-filter:var(--glass);-webkit-backdrop-filter:var(--glass);border-bottom:1px solid rgba(255,255,255,0.2);padding:0 5%;height:64px;display:flex;align-items:center;justify-content:space-between;transition:var(--transition)}
.nav-logo{display:flex;align-items:center;gap:10px;text-decoration:none;font-weight:800;font-size:1.2rem;color:var(--primary)}
.nav-logo svg{width:32px;height:32px}
.nav-links{display:flex;align-items:center;gap:8px;list-style:none}
.nav-links a{text-decoration:none;color:var(--text-muted);font-size:.9rem;font-weight:500;padding:6px 12px;border-radius:8px;transition:var(--transition)}
.nav-links a:hover{color:var(--primary);background:rgba(37,99,235,.08)}
.nav-actions{display:flex;align-items:center;gap:10px}
.btn-theme{background:none;border:1px solid var(--input-border);border-radius:10px;padding:8px;cursor:pointer;color:var(--text);display:flex;align-items:center;justify-content:center;transition:var(--transition)}
.btn-theme:hover{background:var(--primary);color:#fff;border-color:var(--primary)}
.btn-nav-cta{background:var(--primary);color:#fff;border:none;border-radius:10px;padding:8px 18px;font-size:.9rem;font-weight:600;cursor:pointer;transition:var(--transition);text-decoration:none}
.btn-nav-cta:hover{background:var(--primary-dark);transform:translateY(-1px)}
.hamburger{display:none;flex-direction:column;gap:5px;background:none;border:none;cursor:pointer;padding:6px}
.hamburger span{display:block;width:22px;height:2px;background:var(--text);border-radius:2px;transition:var(--transition)}

/* HERO */
.hero{min-height:100vh;background:var(--hero-grad);display:flex;flex-direction:column;align-items:center;justify-content:center;padding:100px 5% 60px;text-align:center;position:relative;overflow:hidden}
.hero::before{content:'';position:absolute;inset:0;background:url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.04'%3E%3Ccircle cx='30' cy='30' r='2'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");animation:bgScroll 20s linear infinite}
@keyframes bgScroll{from{background-position:0 0}to{background-position:60px 60px}}
.hero-badge{display:inline-flex;align-items:center;gap:8px;background:rgba(255,255,255,.12);border:1px solid rgba(255,255,255,.25);border-radius:50px;padding:6px 16px;color:#fff;font-size:.8rem;font-weight:600;margin-bottom:24px;backdrop-filter:blur(8px);animation:fadeInDown .6s ease}
.hero h1{font-size:clamp(2rem,5vw,3.5rem);font-weight:800;color:#fff;line-height:1.15;max-width:800px;margin:0 auto 20px;animation:fadeInUp .7s ease .1s both}
.hero h1 span{background:linear-gradient(90deg,#93c5fd,#c4b5fd);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
.hero-sub{font-size:clamp(1rem,2vw,1.2rem);color:rgba(255,255,255,.8);max-width:640px;margin:0 auto 36px;animation:fadeInUp .7s ease .2s both}
.hero-btns{display:flex;gap:14px;flex-wrap:wrap;justify-content:center;margin-bottom:50px;animation:fadeInUp .7s ease .3s both}
.btn-primary{background:#fff;color:var(--primary);border:none;border-radius:12px;padding:14px 28px;font-size:1rem;font-weight:700;cursor:pointer;transition:var(--transition);text-decoration:none;display:inline-flex;align-items:center;gap:8px}
.btn-primary:hover{transform:translateY(-3px);box-shadow:0 12px 32px rgba(0,0,0,.2)}
.btn-outline{background:rgba(255,255,255,.12);color:#fff;border:1.5px solid rgba(255,255,255,.4);border-radius:12px;padding:14px 28px;font-size:1rem;font-weight:600;cursor:pointer;transition:var(--transition);text-decoration:none;display:inline-flex;align-items:center;gap:8px;backdrop-filter:blur(8px)}
.btn-outline:hover{background:rgba(255,255,255,.22);transform:translateY(-3px)}
.hero-features{display:flex;flex-wrap:wrap;gap:16px;justify-content:center;animation:fadeInUp .7s ease .4s both}
.hero-feature{display:flex;align-items:center;gap:8px;background:rgba(255,255,255,.1);border:1px solid rgba(255,255,255,.2);border-radius:50px;padding:8px 18px;color:#fff;font-size:.85rem;font-weight:500;backdrop-filter:blur(8px)}
.hero-feature svg{width:16px;height:16px;color:#4ade80}
.hero-stats{display:flex;gap:40px;flex-wrap:wrap;justify-content:center;margin-top:50px;padding-top:40px;border-top:1px solid rgba(255,255,255,.15);animation:fadeInUp .7s ease .5s both}
.stat-item{text-align:center;color:#fff}
.stat-num{font-size:2rem;font-weight:800;display:block}
.stat-label{font-size:.8rem;opacity:.7;font-weight:500}

/* AD SLOT */
.ad-slot{width:100%;max-width:728px;margin:0 auto;background:rgba(148,163,184,.1);border:2px dashed rgba(148,163,184,.3);border-radius:var(--radius-sm);padding:20px;text-align:center;color:var(--text-muted);font-size:.8rem}
.ad-container{padding:20px 5%;display:flex;justify-content:center}

/* TOOLS SECTION */
.tools-section{padding:60px 5%;max-width:1200px;margin:0 auto}
.section-header{text-align:center;margin-bottom:48px}
.section-header h2{font-size:clamp(1.6rem,3vw,2.4rem);font-weight:800;color:var(--text);margin-bottom:12px}
.section-header p{color:var(--text-muted);font-size:1rem;max-width:560px;margin:0 auto}
.tag{display:inline-block;background:linear-gradient(90deg,var(--primary),var(--accent));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;font-weight:700;font-size:.85rem;letter-spacing:.05em;margin-bottom:8px}

/* TOOL TABS */
.tool-tabs{display:flex;flex-wrap:wrap;gap:8px;justify-content:center;margin-bottom:36px}
.tab-btn{display:flex;align-items:center;gap:8px;background:var(--bg-card);border:1px solid var(--input-border);border-radius:50px;padding:10px 18px;font-size:.85rem;font-weight:600;color:var(--text-muted);cursor:pointer;transition:var(--transition);backdrop-filter:var(--glass)}
.tab-btn:hover{color:var(--primary);border-color:var(--primary);background:rgba(37,99,235,.06)}
.tab-btn.active{background:linear-gradient(135deg,var(--primary),var(--accent));color:#fff;border-color:transparent;box-shadow:0 4px 16px rgba(37,99,235,.35)}
.tab-btn svg{width:16px;height:16px}

/* CALCULATOR CARDS */
.calc-panel{display:none;animation:fadeIn .35s ease}
.calc-panel.active{display:block}
@keyframes fadeIn{from{opacity:0;transform:translateY(12px)}to{opacity:1;transform:translateY(0)}}
.calc-card{background:var(--bg-card);border:1px solid var(--bg-card-border);border-radius:var(--radius);padding:32px;box-shadow:var(--shadow);backdrop-filter:var(--glass);-webkit-backdrop-filter:var(--glass)}
.calc-grid{display:grid;grid-template-columns:1fr 1fr;gap:20px}
.calc-grid-3{display:grid;grid-template-columns:1fr 1fr 1fr;gap:16px}
.full-width{grid-column:1/-1}
.field-group{display:flex;flex-direction:column;gap:6px}
.field-group label{font-size:.85rem;font-weight:600;color:var(--text-muted)}
.field-group input,.field-group select,.field-group textarea{background:var(--input-bg);border:1.5px solid var(--input-border);border-radius:var(--radius-sm);padding:12px 14px;font-size:.95rem;font-family:'Inter',sans-serif;color:var(--text);transition:var(--transition);width:100%}
.field-group input:focus,.field-group select:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 3px rgba(37,99,235,.12)}
.toggle-group{display:flex;align-items:center;gap:10px;flex-wrap:wrap;margin-top:4px}
.toggle-label{font-size:.85rem;font-weight:600;color:var(--text-muted)}
.toggle{display:flex;align-items:center;gap:6px;cursor:pointer;font-size:.85rem;color:var(--text)}
.toggle input{accent-color:var(--primary);width:16px;height:16px;cursor:pointer}
.calc-btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;background:linear-gradient(135deg,var(--primary),var(--accent));color:#fff;border:none;border-radius:var(--radius-sm);padding:13px 28px;font-size:.95rem;font-weight:700;cursor:pointer;transition:var(--transition);font-family:'Inter',sans-serif}
.calc-btn:hover{transform:translateY(-2px);box-shadow:0 8px 24px rgba(37,99,235,.4)}
.result-box{background:linear-gradient(135deg,rgba(37,99,235,.06),rgba(124,58,237,.06));border:1px solid rgba(37,99,235,.18);border-radius:var(--radius-sm);padding:24px;margin-top:20px}
.result-box h3{font-size:.8rem;font-weight:700;color:var(--primary);text-transform:uppercase;letter-spacing:.08em;margin-bottom:16px}
.result-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(120px,1fr));gap:12px}
.result-item{background:var(--bg-card);border:1px solid var(--bg-card-border);border-radius:var(--radius-sm);padding:16px;text-align:center;box-shadow:var(--shadow)}
.result-item .num{font-size:1.6rem;font-weight:800;background:linear-gradient(135deg,var(--primary),var(--accent));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;display:block}
.result-item .lbl{font-size:.75rem;color:var(--text-muted);font-weight:600;margin-top:2px}
.result-action{display:flex;gap:10px;margin-top:16px;flex-wrap:wrap}
.btn-copy,.btn-share{display:flex;align-items:center;gap:6px;background:none;border:1px solid var(--input-border);border-radius:8px;padding:8px 14px;font-size:.8rem;font-weight:600;color:var(--text-muted);cursor:pointer;transition:var(--transition)}
.btn-copy:hover{color:var(--primary);border-color:var(--primary)}
.btn-share:hover{color:var(--accent);border-color:var(--accent)}
.hidden{display:none!important}

/* TOOL DESCRIPTIONS (for AdSense content) */
.tool-desc{margin-top:28px;padding:24px 28px;background:var(--bg-card);border:1px solid var(--bg-card-border);border-radius:var(--radius);backdrop-filter:var(--glass)}
.tool-desc h3{font-size:1rem;font-weight:700;color:var(--text);margin-bottom:12px}
.tool-desc p{font-size:.88rem;color:var(--text-muted);line-height:1.8;margin-bottom:10px}
.tool-desc p:last-child{margin-bottom:0}

/* COUNTDOWN */
.countdown-display{display:flex;gap:16px;flex-wrap:wrap;justify-content:center;margin-top:8px}
.cd-unit{background:var(--bg-card);border:1px solid var(--bg-card-border);border-radius:var(--radius-sm);padding:20px 24px;text-align:center;box-shadow:var(--shadow);min-width:80px}
.cd-num{font-size:2.5rem;font-weight:800;background:linear-gradient(135deg,var(--primary),var(--accent));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;display:block;line-height:1;font-variant-numeric:tabular-nums}
.cd-lbl{font-size:.7rem;color:var(--text-muted);font-weight:700;text-transform:uppercase;letter-spacing:.06em;margin-top:4px}

/* TIMEZONE */
.tz-row{display:grid;grid-template-columns:1fr 1fr;gap:16px;align-items:end}
.tz-result-list{display:flex;flex-direction:column;gap:10px;margin-top:16px}
.tz-item{display:flex;justify-content:space-between;align-items:center;background:var(--bg-card);border:1px solid var(--bg-card-border);border-radius:var(--radius-sm);padding:14px 18px;box-shadow:var(--shadow)}
.tz-city{font-weight:600;font-size:.9rem}
.tz-time{font-size:1rem;font-weight:700;color:var(--primary)}
.tz-offset{font-size:.75rem;color:var(--text-muted)}

/* AUDIENCE SECTION */
.audience-section{padding:60px 5%;background:linear-gradient(135deg,rgba(37,99,235,.04),rgba(124,58,237,.04))}
.audience-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:20px;max-width:1200px;margin:0 auto}
.audience-card{background:var(--bg-card);border:1px solid var(--bg-card-border);border-radius:var(--radius);padding:28px;box-shadow:var(--shadow);backdrop-filter:var(--glass);transition:var(--transition)}
.audience-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-lg)}
.audience-icon{font-size:2.2rem;margin-bottom:14px;display:block}
.audience-card h3{font-size:1.05rem;font-weight:700;margin-bottom:8px}
.audience-card p{font-size:.85rem;color:var(--text-muted);line-height:1.6}
.audience-tags{display:flex;flex-wrap:wrap;gap:6px;margin-top:12px}
.audience-tag{background:rgba(37,99,235,.1);color:var(--primary);border-radius:50px;padding:3px 10px;font-size:.75rem;font-weight:600}

/* FAQ */
.faq-section{padding:60px 5%;max-width:800px;margin:0 auto}
.faq-item{background:var(--bg-card);border:1px solid var(--bg-card-border);border-radius:var(--radius-sm);margin-bottom:10px;overflow:hidden;box-shadow:var(--shadow);transition:var(--transition)}
.faq-q{display:flex;justify-content:space-between;align-items:center;padding:18px 22px;cursor:pointer;font-weight:600;font-size:.95rem;gap:12px}
.faq-q svg{min-width:18px;height:18px;color:var(--primary);transition:transform .3s}
.faq-item.open .faq-q svg{transform:rotate(180deg)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .4s ease,padding .3s ease}
.faq-item.open .faq-a{max-height:300px}
.faq-a p{padding:0 22px 18px;color:var(--text-muted);font-size:.9rem;line-height:1.7}

/* TRUST */
.trust-section{padding:50px 5%;text-align:center;border-top:1px solid var(--input-border);border-bottom:1px solid var(--input-border)}
.trust-grid{display:flex;flex-wrap:wrap;gap:30px;justify-content:center;align-items:center;max-width:900px;margin:0 auto}
.trust-item{display:flex;align-items:center;gap:10px;color:var(--text-muted);font-size:.9rem;font-weight:500}
.trust-item svg{color:var(--primary);width:22px;height:22px}

/* HISTORY */
.history-section{padding:60px 5%;max-width:1200px;margin:0 auto}
.history-list{display:flex;flex-direction:column;gap:8px;max-height:300px;overflow-y:auto}
.history-item{display:flex;justify-content:space-between;align-items:center;background:var(--bg-card);border:1px solid var(--bg-card-border);border-radius:var(--radius-sm);padding:12px 16px;font-size:.85rem;cursor:pointer;transition:var(--transition)}
.history-item:hover{border-color:var(--primary);color:var(--primary)}
.history-tool{font-weight:700;color:var(--primary)}
.history-time{color:var(--text-muted);font-size:.75rem}
.no-history{color:var(--text-muted);text-align:center;padding:30px;font-size:.9rem}

/* FOOTER */
footer{background:var(--footer-bg);color:rgba(255,255,255,.7);padding:60px 5% 30px}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:40px;max-width:1200px;margin:0 auto;margin-bottom:40px}
.footer-brand .nav-logo{color:#fff;margin-bottom:12px}
.footer-brand p{font-size:.85rem;line-height:1.7;max-width:260px}
.footer-col h4{color:#fff;font-weight:700;font-size:.95rem;margin-bottom:14px}
.footer-col ul{list-style:none;display:flex;flex-direction:column;gap:8px}
.footer-col ul a{color:rgba(255,255,255,.6);text-decoration:none;font-size:.85rem;transition:var(--transition)}
.footer-col ul a:hover{color:#fff}
.footer-bottom{border-top:1px solid rgba(255,255,255,.1);padding-top:24px;display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:12px;max-width:1200px;margin:0 auto;font-size:.8rem}

/* BLOG */
.blog-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:24px;max-width:1200px;margin:0 auto;padding:60px 5%}
.blog-card{background:var(--bg-card);border:1px solid var(--bg-card-border);border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow);transition:var(--transition);text-decoration:none;color:var(--text)}
.blog-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-lg)}
.blog-card-img{height:160px;background:var(--hero-grad);display:flex;align-items:center;justify-content:center;font-size:3rem}
.blog-card-body{padding:22px}
.blog-card-tag{display:inline-block;background:rgba(37,99,235,.1);color:var(--primary);border-radius:50px;padding:3px 12px;font-size:.75rem;font-weight:700;margin-bottom:10px}
.blog-card h3{font-size:1rem;font-weight:700;line-height:1.45;margin-bottom:8px}
.blog-card p{font-size:.83rem;color:var(--text-muted);line-height:1.6}
.blog-card-meta{font-size:.75rem;color:var(--text-muted);margin-top:12px}

/* TESTIMONIALS */
.testimonials{padding:60px 5%;background:linear-gradient(135deg,rgba(37,99,235,.03),rgba(124,58,237,.03))}
.testimonial-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:20px;max-width:1200px;margin:0 auto}
.testimonial-card{background:var(--bg-card);border:1px solid var(--bg-card-border);border-radius:var(--radius);padding:24px;box-shadow:var(--shadow);backdrop-filter:var(--glass)}
.testimonial-stars{color:#f59e0b;font-size:1rem;margin-bottom:10px}
.testimonial-card p{font-size:.88rem;color:var(--text-muted);line-height:1.65;margin-bottom:14px;font-style:italic}
.testimonial-user{display:flex;align-items:center;gap:10px}
.testimonial-avatar{width:36px;height:36px;border-radius:50%;background:linear-gradient(135deg,var(--primary),var(--accent));display:flex;align-items:center;justify-content:center;color:#fff;font-weight:700;font-size:.9rem}
.testimonial-name{font-weight:700;font-size:.85rem}
.testimonial-role{font-size:.75rem;color:var(--text-muted)}

/* ANIMATIONS */
@keyframes fadeInDown{from{opacity:0;transform:translateY(-16px)}to{opacity:1;transform:translateY(0)}}
@keyframes fadeInUp{from{opacity:0;transform:translateY(16px)}to{opacity:1;transform:translateY(0)}}
.reveal{opacity:0;transform:translateY(24px);transition:opacity .6s ease,transform .6s ease}
.reveal.visible{opacity:1;transform:translateY(0)}

/* RESPONSIVE */
@media(max-width:900px){
  .nav-links{display:none;position:fixed;top:64px;left:0;right:0;background:var(--nav-bg);backdrop-filter:var(--glass);flex-direction:column;padding:20px;gap:4px;border-bottom:1px solid var(--input-border)}
  .nav-links.open{display:flex}
  .hamburger{display:flex}
  .calc-grid,.calc-grid-3,.tz-row{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr 1fr}
  .hero-stats{gap:24px}
}
@media(max-width:600px){
  .footer-grid{grid-template-columns:1fr}
  .hero-btns{flex-direction:column;align-items:center}
  .cd-num{font-size:2rem}
  .cd-unit{padding:14px 16px}
  .result-grid{grid-template-columns:repeat(2,1fr)}
}

/* UTILITIES */
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 5%}
.nav-container{display:flex;align-items:center;justify-content:space-between;width:100%;max-width:1400px;margin:0 auto;padding:0 5%}
.logo{font-size:1.2rem;font-weight:800;color:var(--primary);text-decoration:none;display:flex;align-items:center;gap:6px}
.logo span{color:var(--accent)}
.history-container{margin-top:32px;background:var(--bg-card);border:1px solid var(--bg-card-border);border-radius:var(--radius);padding:24px;backdrop-filter:var(--glass)}
.history-container h4{font-size:.85rem;font-weight:700;color:var(--text-muted);text-transform:uppercase;letter-spacing:.06em;margin-bottom:12px}
.faq-grid{display:flex;flex-direction:column;gap:10px}
.result-main{text-align:center;padding:12px 0}
.result-main span{font-size:2rem;font-weight:800;background:linear-gradient(135deg,var(--primary),var(--accent));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;display:block}
.result-main h4{font-size:1.2rem;font-weight:700;color:var(--text)}
.result-sub{margin-top:12px;color:var(--text-muted);font-size:.9rem;line-height:1.8}
.result-sub p{display:flex;justify-content:space-between;padding:4px 0;border-bottom:1px solid var(--input-border)}
.result-sub span{font-weight:700;color:var(--text)}
.op-select{margin:12px 0}
.op-select select{background:var(--input-bg);border:1.5px solid var(--input-border);border-radius:var(--radius-sm);padding:10px 14px;font-family:'Inter',sans-serif;font-size:.9rem;color:var(--text);width:auto;cursor:pointer}
.milestones{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin-top:12px}
.small{font-size:.8rem;padding:6px 12px}
nav .logo{font-size:1.2rem;font-weight:800;color:var(--primary);text-decoration:none}
nav .btn-primary{font-size:.85rem;padding:8px 16px}