:root {
            --primary: #4361ee;
            --secondary: #3a0ca3;
            --accent: #f72585;
            --light: #f8f9fa;
            --dark: #212529;
            --success: #4cc9f0;
            --warning: #f9c74f;
            --gradient-primary: linear-gradient(135deg, #4361ee, #3a0ca3);
            --gradient-accent: linear-gradient(135deg, #f72585, #b5179e);
            --shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
            --transition: all 0.3s ease;
        }

         
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
        }

        body {
            background-color: var(--light);
            color: var(--dark);
            line-height: 1.6;
            overflow-x: hidden;
        }

        .app-container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }

        /* Navigation */
        .navbar {
            background: var(--gradient-primary);
            color: white;
            padding: 1rem 0;
            position: sticky;
            top: 0;
            z-index: 100;
            box-shadow: var(--shadow);
        }

        .nav-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }

        .logo {
            font-size: 1.8rem;
            font-weight: 700;
            display: flex;
            align-items: center;
        }

        .logo i {
            margin-right: 10px;
            color: var(--accent);
        }

        .nav-links {
            display: flex;
            list-style: none;
        }

        .nav-links li {
            margin-left: 1.5rem;
        }

        .nav-links a {
            color: white;
            text-decoration: none;
            font-weight: 500;
            transition: var(--transition);
            padding: 0.5rem 1rem;
            border-radius: 50px;
        }

        .nav-links a:hover, .nav-links a.active {
            background: rgba(255, 255, 255, 0.2);
        }

        .mobile-menu-btn {
            display: none;
            background: none;
            border: none;
            color: white;
            font-size: 1.5rem;
            cursor: pointer;
        }

        /* Pages */
        .page {
            display: none;
            animation: fadeIn 0.5s ease forwards;
            min-height: calc(100vh - 180px);
            padding: 2rem 0;
        }

        .page.active {
            display: block;
        }

        @keyframes fadeIn {
            from { opacity: 0; transform: translateY(20px); }
            to { opacity: 1; transform: translateY(0); }
        }

        /* Home Page */
        .hero {
            text-align: center;
            padding: 4rem 0;
            background: var(--gradient-primary);
            color: white;
            border-radius: 20px;
            margin-bottom: 3rem;
            box-shadow: var(--shadow);
        }

        .hero h1 {
            font-size: 3rem;
            margin-bottom: 1rem;
        }

        .hero p {
            font-size: 1.2rem;
            max-width: 700px;
            margin: 0 auto 2rem;
        }

        .btn {
            display: inline-block;
            background: var(--accent);
            color: white;
            padding: 0.8rem 2rem;
            border-radius: 50px;
            text-decoration: none;
            font-weight: 600;
            transition: var(--transition);
            border: none;
            cursor: pointer;
            box-shadow: 0 4px 14px rgba(247, 37, 133, 0.4);
        }

        .btn:hover {
            transform: translateY(-3px);
            box-shadow: 0 6px 20px rgba(247, 37, 133, 0.6);
        }

        .btn-outline {
            background: transparent;
            border: 2px solid white;
            margin-left: 1rem;
        }

        .btn-outline:hover {
            background: white;
            color: var(--primary);
        }

        .features {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 2rem;
            margin-bottom: 3rem;
        }

        .feature-card {
            background: white;
            padding: 2rem;
            border-radius: 15px;
            box-shadow: var(--shadow);
            transition: var(--transition);
            text-align: center;
        }

        .feature-card:hover {
            transform: translateY(-10px);
            box-shadow: 0 15px 30px rgba(0, 0, 0, 0.1);
        }

        .feature-icon {
            font-size: 3rem;
            margin-bottom: 1rem;
            color: var(--primary);
        }

        /* Practice Page */
        .practice-container {
            background: white;
            border-radius: 15px;
            padding: 2rem;
            box-shadow: var(--shadow);
        }

        .category-selector {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
            gap: 1rem;
            margin-bottom: 2rem;
        }

        .category-btn {
            background: white;
            border: 2px solid var(--primary);
            color: var(--primary);
            padding: 1rem;
            border-radius: 10px;
            cursor: pointer;
            transition: var(--transition);
            font-weight: 600;
        }

        .category-btn.active, .category-btn:hover {
            background: var(--primary);
            color: white;
        }

        .interview-interface {
            background: #f8f9fa;
            border-radius: 15px;
            padding: 2rem;
            margin-bottom: 2rem;
        }

        .question-display {
            background: white;
            padding: 1.5rem;
            border-radius: 10px;
            margin-bottom: 1.5rem;
            box-shadow: 0 4px 10px rgba(0, 0, 0, 0.05);
        }

        .response-input {
            width: 100%;
            min-height: 150px;
            padding: 1rem;
            border: 2px solid #e9ecef;
            border-radius: 10px;
            resize: vertical;
            margin-bottom: 1rem;
            font-family: inherit;
        }

        .timer {
            background: var(--gradient-accent);
            color: white;
            padding: 0.5rem 1rem;
            border-radius: 50px;
            display: inline-block;
            margin-bottom: 1rem;
            font-weight: 600;
        }

        .feedback-area {
            background: white;
            padding: 1.5rem;
            border-radius: 10px;
            margin-top: 2rem;
            box-shadow: 0 4px 10px rgba(0, 0, 0, 0.05);
            display: none;
        }

        .feedback-area.show {
            display: block;
            animation: fadeIn 0.5s ease;
        }

        /* Past Notes Page */
        .notes-container {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
            gap: 1.5rem;
        }

        .note-card {
            background: white;
            border-radius: 15px;
            overflow: hidden;
            box-shadow: var(--shadow);
            transition: var(--transition);
        }

        .note-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
        }

        .note-header {
            background: var(--gradient-primary);
            color: white;
            padding: 1rem;
            display: flex;
            justify-content: space-between;
            align-items: center;
        }

        .note-content {
            padding: 1.5rem;
        }

        .note-date {
            font-size: 0.9rem;
            color: #6c757d;
        }

        .empty-state {
            text-align: center;
            padding: 3rem;
            color: #6c757d;
        }

        .empty-state i {
            font-size: 4rem;
            margin-bottom: 1rem;
            color: #dee2e6;
        }

        /* Contact Page */
        .contact-container {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 3rem;
        }

        .contact-info {
            background: var(--gradient-primary);
            color: white;
            padding: 2rem;
            border-radius: 15px;
        }

        .contact-item {
            display: flex;
            align-items: center;
            margin-bottom: 1.5rem;
        }

        .contact-icon {
            font-size: 1.5rem;
            margin-right: 1rem;
            width: 40px;
            height: 40px;
            background: rgba(255, 255, 255, 0.2);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
        }

        .contact-form {
            background: white;
            padding: 2rem;
            border-radius: 15px;
            box-shadow: var(--shadow);
        }

        .form-group {
            margin-bottom: 1.5rem;
        }

        .form-label {
            display: block;
            margin-bottom: 0.5rem;
            font-weight: 600;
        }

        .form-input, .form-textarea {
            width: 100%;
            padding: 0.8rem 1rem;
            border: 2px solid #e9ecef;
            border-radius: 10px;
            font-family: inherit;
            transition: var(--transition);
        }

        .form-input:focus, .form-textarea:focus {
            border-color: var(--primary);
            outline: none;
        }

        .form-textarea {
            min-height: 150px;
            resize: vertical;
        }

        /* Resources Page */
        .resources-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
            gap: 2rem;
        }

        .resource-card {
            background: white;
            border-radius: 15px;
            overflow: hidden;
            box-shadow: var(--shadow);
            transition: var(--transition);
        }

        .resource-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 15px 30px rgba(0, 0, 0, 0.1);
        }

        .resource-img {
            height: 180px;
            background: var(--gradient-primary);
            display: flex;
            align-items: center;
            justify-content: center;
            color: white;
            font-size: 3rem;
        }

        .resource-content {
            padding: 1.5rem;
        }

        .resource-link {
            display: inline-block;
            color: var(--primary);
            font-weight: 600;
            text-decoration: none;
            margin-top: 1rem;
        }

        .resource-link i {
            margin-left: 0.5rem;
            transition: var(--transition);
        }

        .resource-link:hover i {
            transform: translateX(5px);
        }

        /* Footer */
        footer {
            background: var(--dark);
            color: white;
            padding: 3rem 0 1.5rem;
            margin-top: 4rem;
        }

        .footer-content {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 2rem;
            margin-bottom: 2rem;
        }

        .footer-logo {
            font-size: 1.5rem;
            font-weight: 700;
            margin-bottom: 1rem;
        }

        .footer-links h3 {
            margin-bottom: 1rem;
            font-size: 1.2rem;
        }

        .footer-links ul {
            list-style: none;
        }

        .footer-links li {
            margin-bottom: 0.5rem;
        }

        .footer-links a {
            color: #adb5bd;
            text-decoration: none;
            transition: var(--transition);
        }

        .footer-links a:hover {
            color: white;
        }

        .social-links {
            display: flex;
            gap: 1rem;
            margin-top: 1rem;
        }

        .social-links a {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            background: rgba(255, 255, 255, 0.1);
            border-radius: 50%;
            color: white;
            text-decoration: none;
            transition: var(--transition);
        }

        .social-links a:hover {
            background: var(--primary);
            transform: translateY(-3px);
        }

        .copyright {
            text-align: center;
            padding-top: 1.5rem;
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            color: #adb5bd;
            font-size: 0.9rem;
        }

        /* Responsive Styles */
        @media (max-width: 992px) {
            .contact-container {
                grid-template-columns: 1fr;
            }
            
            .hero h1 {
                font-size: 2.5rem;
            }
        }

        @media (max-width: 768px) {
            .nav-links {
                position: fixed;
                top: 70px;
                left: -100%;
                width: 100%;
                height: calc(100vh - 70px);
                background: var(--gradient-primary);
                flex-direction: column;
                align-items: center;
                justify-content: center;
                transition: var(--transition);
                z-index: 99;
            }
            
            .nav-links.active {
                left: 0;
            }
            
            .nav-links li {
                margin: 1.5rem 0;
            }
            
            .mobile-menu-btn {
                display: block;
            }
            
            .hero h1 {
                font-size: 2rem;
            }
            
            .hero p {
                font-size: 1rem;
            }
            
            .btn {
                display: block;
                margin: 0.5rem auto;
                width: 80%;
            }
            
            .btn-outline {
                margin-left: 0;
            }
        }

        @media (max-width: 576px) {
            .app-container {
                padding: 0 15px;
            }
            
            .hero {
                padding: 2rem 1rem;
            }
            
            .feature-card, .practice-container, .interview-interface {
                padding: 1.5rem;
            }
            
            .category-selector {
                grid-template-columns: 1fr;
            }
        }

        /* Loading Animation */
        .loader {
            display: inline-block;
            width: 80px;
            height: 80px;
            margin: 2rem auto;
            display: none;
        }

        .loader:after {
            content: " ";
            display: block;
            width: 64px;
            height: 64px;
            margin: 8px;
            border-radius: 50%;
            border: 6px solid var(--primary);
            border-color: var(--primary) transparent var(--primary) transparent;
            animation: loader 1.2s linear infinite;
        }

        @keyframes loader {
            0% { transform: rotate(0deg); }
            100% { transform: rotate(360deg); }
        }





        /*login page*/

       /* Ensure html and body take full height */
html, body {
  height: 100%;
  margin: 0;
  padding: 0;
}

/* Wrapper to perfectly center login card */
#login .login-wrapper {
  display: flex;
  justify-content: center; /* horizontal center */
  align-items: center;     /* vertical center */
  height: 100vh;           /* full viewport height */
  background: #e5e6ec;     /* light background */
  padding: 20px;
}

/* Login card */
#login .login-container {
  width: 100%;
  max-width: 400px;
  padding: 35px 30px;
  background: linear-gradient(145deg, #ffffff, #f0f0f0);
  border-radius: 20px;
  box-shadow: 0px 15px 30px rgba(0,0,0,0.1), 0px 6px 12px rgba(0,0,0,0.05);
  text-align: center;
  animation: fadeIn 0.6s ease-in-out;
}

/* Heading */
#login .login-heading {
  font-size: 28px;
  font-weight: 700;
  margin-bottom: 8px;
  color: #333;
}

/* Subheading */
#login .subheading {
  font-size: 14px;
  margin-bottom: 25px;
  color: #666;
}

/* Form group */
#login .form-group {
  margin-bottom: 18px;
  text-align: left;
}

/* Labels */
#login .form-label {
  display: block;
  font-weight: 600;
  margin-bottom: 6px;
  color: #555;
}

/* Inputs */
#login .form-input {
  width: 100%;
  padding: 12px 15px;
  border: 1px solid #908fb4;
  border-radius: 12px;
  font-size: 15px;
  transition: 0.2s;
}

#login .form-input:focus {
  border-color: #5a67d8;
  box-shadow: 0 0 8px rgba(90,103,216,0.3);
  outline: none;
}

/* Login Button */
#login .btn {
  width: 100%;
  padding: 14px;
  margin-top: 10px;
  background-color: #5a67d8;
  color: rgb(170, 193, 205);
  font-size: 16px;
  font-weight: 600;
  border: none;
  border-radius: 12px;
  cursor: pointer;
  transition: 0.3s;
}

#login .btn:hover {
  background-color: #434aa8;
  transform: translateY(-2px);
  box-shadow: 0 5px 15px rgba(0,0,0,0.1);
}

/* Message box (error/success) */
#login #login-message {
  margin-top: 12px;
  font-weight: bold;
  font-size: 14px;
  min-height: 20px;
  transition: 0.3s;
}

/* Signup text */
#login .signup-text {
  text-align: center;
  margin-top: 18px;
  font-size: 14px;
}

#login .signup-text a {
  color: #5a67d8;
  font-weight: 600;
  text-decoration: none;
}

#login .signup-text a:hover {
  text-decoration: underline;
}

/* Card fade-in animation */
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}