*,*::before,*::after{box-sizing:border-box}body{margin:0;padding:0;font-family:var(--font-family);font-size:var(--font-size);background:var(--bg-main);color:var(--text-primary);min-height:100vh}:root,body.theme-default{--font-family:'Segoe UI',Tahoma,Geneva,Verdana,sans-serif;--font-size:14px;--bg-main:#1a1a2e;--bg-panel:#16213e;--bg-input:#0f3460;--bg-header:#0f3460;--text-primary:#e8e8e8;--text-secondary:#a0a0a0;--text-muted:#666;--accent:#00d4ff;--accent-hover:#00b8e0;--border-color:#2a3f5f;--btn-bg:#0f3460;--btn-text:#00d4ff;--btn-hover:#1a4a7a;--error-color:#f44;--success-color:#0c6;--warning-color:#fa0;--link-color:#00d4ff}.login-container{display:flex;justify-content:center;align-items:center;min-height:100vh;padding:20px}.login-box{background:var(--bg-panel);border:1px solid var(--border-color);border-radius:8px;padding:40px;width:100%;max-width:400px;box-shadow:0 4px 20px rgba(0,0,0,.3)}.login-header{text-align:center;margin-bottom:30px}.login-header h1{margin:0;font-size:24px;color:var(--accent);display:flex;align-items:center;justify-content:center;gap:10px}.login-header .icon{font-size:28px}.form-group{margin-bottom:20px}.form-group label{display:block;margin-bottom:8px;color:var(--text-secondary);font-size:13px;text-transform:uppercase;letter-spacing:.5px}.form-group input{width:100%;padding:12px 15px;background:var(--bg-input);border:1px solid var(--border-color);border-radius:4px;color:var(--text-primary);font-family:inherit;font-size:inherit;transition:border-color .2s,box-shadow .2s}.form-group input:focus{outline:0;border-color:var(--accent);box-shadow:0 0 0 3px rgba(0,212,255,.1)}.form-group input::placeholder{color:var(--text-muted)}.btn{display:inline-flex;align-items:center;justify-content:center;padding:12px 24px;background:var(--btn-bg);color:var(--btn-text);border:1px solid var(--border-color);border-radius:4px;font-family:inherit;font-size:inherit;font-weight:600;cursor:pointer;transition:background .2s,transform .1s;text-decoration:none}.btn:hover{background:var(--btn-hover)}.btn:active{transform:scale(.98)}.btn-primary{background:var(--accent);color:#fff;border-color:var(--accent)}.btn-primary:hover{background:var(--accent-hover);border-color:var(--accent-hover)}.btn-full{width:100%}.error-message{background:rgba(255,68,68,.1);border:1px solid var(--error-color);border-radius:4px;padding:12px 15px;margin-bottom:20px;color:var(--error-color);font-size:13px;white-space:pre-line}.success-message{background:rgba(0,204,102,.1);border:1px solid var(--success-color);border-radius:4px;padding:12px 15px;margin-bottom:20px;color:var(--success-color);font-size:13px}.login-footer{margin-top:30px;text-align:center;color:var(--text-muted);font-size:12px}@media(max-width:480px){.login-box{padding:30px 20px}.login-header h1{font-size:20px}}