.btn-full,.header__container,.main{margin:0 auto;width:100%}*,.btn-full{box-sizing:border-box}.header,.tool-container{box-shadow:var(--shadow)}.main button,.tool-title{text-transform:uppercase}.btn-full:hover,.btn:hover{transform:translateY(-2px)}:root{--black:#1a1a1a;--dark-bg:#121212;--card-bg:#1f1f1f;--light-bg:#232323;--lighter-bg:#292929;--green:#00ff99;--green-dark:#00e68a;--green-light:#d0f0c0;--white:#ffffff;--text-light:#cccccc;--text-muted:#888;--error:#ff6666;--warning:#ffcc00;--shadow:0 0 20px rgba(0, 255, 150, 0.3);--inset-shadow:inset 0 0 10px rgba(0, 255, 154, 0.3)}*{margin:0;padding:0}body{background:var(--dark-bg);color:var(--white);font-family:'Segoe UI',Tahoma,Geneva,Verdana,sans-serif;line-height:1.6;min-height:100vh;display:flex;flex-direction:column}.header{background:var(--card-bg);padding:1rem 2rem;position:sticky;top:0;z-index:100}.header__container{display:flex;justify-content:space-between;align-items:center;max-width:1200px}.header__logo{display:flex;align-items:center;gap:10px;font-weight:700;font-size:1.5rem;color:var(--green);text-decoration:none}.header__logo:hover{color:var(--green-light)}.header__logo-img{height:40px}.header__nav-list{display:flex;list-style:none;gap:1.5rem}.header__nav-link{color:var(--text-light);text-decoration:none;font-weight:500;transition:color .3s}.footer__link:hover,.header__nav-link:hover{color:var(--green)}.btn,.btn-full,.main button{font-weight:700;cursor:pointer}.header__mobile-btn{display:none;background:0 0;border:none;color:var(--green);font-size:1.5rem;cursor:pointer}.main{flex:1;padding:2rem;max-width:1200px}.btn-full{display:block;max-width:300px;padding:12px 24px;background:#0f9;color:#121212;font-size:1rem;border:none;border-radius:8px;transition:.3s}@media (min-width:781px) and (max-width:1024px){.btn-full{max-width:280px;padding:14px 28px;font-size:1.05rem}}@media (min-width:1025px){.btn-full{max-width:320px}}@media (max-width:480px){.btn-full{padding:10px 20px;font-size:.95rem}}.btn-full:hover{background:#00e68a;box-shadow:0 4px 8px rgba(0,0,0,.2)}.main button{background:#007f66;padding:10px 16px;font-size:.9rem;color:#fff;border-radius:8px;border:none;transition:background .3s;flex:1 1 calc(50% - 10px)}.main button:hover{background:#00b386}.footer{position:relative;overflow:hidden;background:var(--card-bg);color:var(--white);text-align:center;padding:4rem 2rem;margin-top:auto}.footer__parallax{position:absolute;top:0;left:0;width:100%;height:100%;background:url('https://images.unsplash.com/photo-1639762681057-408e52192e55?q=80&w=2232&auto=format&fit=crop') center/cover no-repeat fixed;opacity:.15;z-index:1}.footer__content{position:relative;z-index:2;max-width:1200px;margin:0 auto}.footer__links{display:flex;justify-content:center;flex-wrap:wrap;gap:1.5rem;margin-bottom:1.5rem}.footer__link{color:var(--text-light);text-decoration:none;transition:color .3s}.footer__copyright{color:var(--text-muted);font-size:.9rem}.tool-container{background:var(--card-bg);border-radius:12px;width:100%;padding:30px;margin:20px 0}.tool-title{text-align:center;color:var(--green);margin-bottom:25px;font-size:2rem;letter-spacing:1px}.btn{width:100%;padding:14px;background:var(--green);color:var(--black);font-size:1.1rem;border:none;border-radius:10px;transition:.3s;margin-bottom:15px}.btn:hover{background:var(--green-dark)}.btn--secondary{background:var(--lighter-bg);color:var(--green);border:1px solid var(--green)}@media (max-width:768px){.header__container{padding:0 1rem}.header__nav-list{display:none;flex-direction:column;position:absolute;top:70px;left:0;width:100%;background:var(--card-bg);padding:1rem;box-shadow:0 10px 15px rgba(0,0,0,.1)}.header__nav-list--show{display:flex}.header__mobile-btn{display:block}.footer__parallax{background-attachment:scroll}}.about-tool h2,.about-tool h3,.tool-tip strong{color:var(--green)}.about-tool{max-width:800px;margin:2.5rem auto;padding:1.5rem;background:var(--light-bg);border-radius:12px;box-shadow:var(--shadow);color:var(--text-light);line-height:1.6;border:1px solid rgba(0,255,154,.2)}.about-tool h2{margin-bottom:1.25rem;text-align:center;font-size:1.8rem;position:relative;padding-bottom:10px}.about-tool h2:after{content:"";position:absolute;bottom:0;left:50%;transform:translateX(-50%);width:80px;height:3px;background:var(--green)}.about-tool h3{margin:1.5rem 0 1rem;font-size:1.3rem}.about-tool p{margin-bottom:1rem}.about-tool ol,.about-tool ul{padding-left:1.5rem;margin-bottom:1.25rem}.about-tool li{margin-bottom:.5rem;position:relative;padding-left:1.5rem}.about-tool li:before{content:"•";color:var(--green);position:absolute;left:0}.tool-tip{margin:1.5rem 0;padding:1rem;background:rgba(0,255,154,.1);border-left:4px solid var(--green);border-radius:4px;position:relative}.tool-tip:before{content:"💡";position:absolute;left:-15px;top:-15px;font-size:1.5rem}@media (max-width:600px){.about-tool{padding:1.25rem;margin:2rem 1rem;border-radius:8px}.about-tool h2{font-size:1.5rem}.about-tool h2:after{width:60px;height:2px}.about-tool h3{font-size:1.15rem}.about-tool li{padding-left:1rem}.tool-tip:before{left:-10px;top:-10px;font-size:1.2rem}}