:root {
    --primary: #2563eb;
    --primary-dark: #1d4ed8;
    --primary-light: #60a5fa;
    --background: #f8fafc;
    --card-bg: #ffffff;
    --text: #1e293b;
    --text-light: #64748b;
    --border: #e2e8f0;
    --shadow: rgba(0, 0, 0, 0.08);
    --success: #10b981;
    --radius: 16px;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
}

body {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--background);
    padding: 20px;
    color: var(--text);
    line-height: 1.5;
}

.login-container {
    width: 100%;
    max-width: 440px;
    background: var(--card-bg);
    border-radius: var(--radius);
    box-shadow: 0 20px 60px var(--shadow), 0 1px 3px rgba(0, 0, 0, 0.04);
    overflow: hidden;
    position: relative;
    transition: var(--transition);
}

    .login-container::before {
        content: '';
        position: absolute;
        top: 0;
        left: 0;
        right: 0;
        height: 4px;
        background: linear-gradient(90deg, var(--primary), var(--primary-light));
    }

.header {
    padding: 48px 40px 32px;
    text-align: center;
    background: linear-gradient(135deg, rgba(37, 99, 235, 0.05) 0%, transparent 100%);
}

.logo {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 72px;
    height: 72px;
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    border-radius: 20px;
    margin-bottom: 24px;
    box-shadow: 0 8px 24px rgba(37, 99, 235, 0.2);
}

    .logo svg {
        width: 32px;
        height: 32px;
        color: white;
    }

.title {
    font-size: 28px;
    font-weight: 700;
    color: var(--text);
    margin-bottom: 8px;
    letter-spacing: -0.5px;
}

.subtitle {
    font-size: 15px;
    color: var(--text-light);
    font-weight: 400;
}

.form-section {
    padding: 0 40px 40px;
}

.form-group {
    margin-bottom: 24px;
}

.label {
    display: block;
    font-size: 14px;
    font-weight: 600;
    color: var(--text);
    margin-bottom: 8px;
    padding-left: 4px;
}

.input-container {
    position: relative;
}

.input-field {
    width: 100%;
    padding: 16px 20px 16px 52px;
    border: 2px solid var(--border);
    border-radius: 12px;
    font-size: 16px;
    color: var(--text);
    background: white;
    transition: var(--transition);
    outline: none;
    font-weight: 400;
}

    .input-field:focus {
        border-color: var(--primary);
        box-shadow: 0 0 0 4px rgba(37, 99, 235, 0.1);
    }

    .input-field::placeholder {
        color: var(--text-light);
        opacity: 0.7;
    }

.input-icon {
    position: absolute;
    left: 20px;
    top: 50%;
    transform: translateY(-50%);
    width: 20px;
    height: 20px;
    color: var(--text-light);
    pointer-events: none;
    transition: var(--transition);
}

.input-field:focus + .input-icon {
    color: var(--primary);
}

.password-toggle {
    position: absolute;
    right: 20px;
    top: 50%;
    transform: translateY(-50%);
    background: none;
    border: none;
    color: var(--text-light);
    cursor: pointer;
    padding: 4px;
    border-radius: 6px;
    transition: var(--transition);
}

    .password-toggle:hover {
        color: var(--primary);
        background: rgba(37, 99, 235, 0.05);
    }

    .password-toggle svg {
        width: 20px;
        height: 20px;
    }

.remember-forgot {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 32px;
}

.remember {
    display: flex;
    align-items: center;
    gap: 10px;
    cursor: pointer;
}

.checkbox-container {
    position: relative;
    width: 20px;
    height: 20px;
}

.checkbox-input {
    position: absolute;
    opacity: 0;
    cursor: pointer;
    width: 100%;
    height: 100%;
    z-index: 2;
}

.checkmark {
    position: absolute;
    top: 0;
    left: 0;
    width: 20px;
    height: 20px;
    border: 2px solid var(--border);
    border-radius: 6px;
    background: white;
    transition: var(--transition);
}

    .checkmark svg {
        position: absolute;
        top: 50%;
        left: 50%;
        transform: translate(-50%, -50%);
        width: 14px;
        height: 14px;
        color: white;
        opacity: 0;
        transition: var(--transition);
    }

.checkbox-input:checked ~ .checkmark {
    background: var(--primary);
    border-color: var(--primary);
}

    .checkbox-input:checked ~ .checkmark svg {
        opacity: 1;
    }

.remember-label {
    font-size: 14px;
    color: var(--text);
    font-weight: 500;
}

.forgot-link {
    font-size: 14px;
    color: var(--primary);
    text-decoration: none;
    font-weight: 500;
    padding: 6px 12px;
    border-radius: 8px;
    transition: var(--transition);
}

    .forgot-link:hover {
        background: rgba(37, 99, 235, 0.05);
    }

.login-button {
    width: 100%;
    padding: 18px;
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: white;
    border: none;
    border-radius: 12px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    box-shadow: 0 4px 16px rgba(37, 99, 235, 0.25);
}

    .login-button:hover {
        transform: translateY(-2px);
        box-shadow: 0 6px 24px rgba(37, 99, 235, 0.35);
    }

    .login-button:active {
        transform: translateY(0);
    }

.button-icon {
    width: 20px;
    height: 20px;
    transition: var(--transition);
}

.divider {
    display: flex;
    align-items: center;
    margin: 32px 0;
    color: var(--text-light);
    font-size: 14px;
}

    .divider::before,
    .divider::after {
        content: '';
        flex: 1;
        height: 1px;
        background: var(--border);
    }

    .divider span {
        padding: 0 16px;
    }

.social-login {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
    margin-bottom: 32px;
}

.social-button {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    padding: 14px;
    border: 2px solid var(--border);
    border-radius: 12px;
    background: white;
    font-size: 14px;
    font-weight: 500;
    color: var(--text);
    cursor: pointer;
    transition: var(--transition);
}

    .social-button:hover {
        border-color: var(--primary);
        background: rgba(37, 99, 235, 0.02);
    }

    .social-button svg {
        width: 18px;
        height: 18px;
    }

.signup-link {
    text-align: center;
    font-size: 14px;
    color: var(--text-light);
    margin-top: 24px;
}

    .signup-link a {
        color: var(--primary);
        text-decoration: none;
        font-weight: 600;
        margin-left: 6px;
        padding: 4px 8px;
        border-radius: 6px;
        transition: var(--transition);
    }

        .signup-link a:hover {
            background: rgba(37, 99, 235, 0.05);
        }

/* Responsive Design */
@media (max-width: 480px) {
    .login-container {
        max-width: 100%;
        border-radius: 12px;
    }

    .header {
        padding: 40px 24px 28px;
    }

    .form-section {
        padding: 0 24px 32px;
    }

    .title {
        font-size: 24px;
    }

    .subtitle {
        font-size: 14px;
    }

    .logo {
        width: 64px;
        height: 64px;
        border-radius: 16px;
        margin-bottom: 20px;
    }

        .logo svg {
            width: 28px;
            height: 28px;
        }

    .input-field {
        padding: 14px 20px 14px 48px;
        font-size: 15px;
    }

    .login-button {
        padding: 16px;
        font-size: 15px;
    }

    .remember-forgot {
        flex-direction: column;
        align-items: flex-start;
        gap: 16px;
    }

    .social-login {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 350px) {
    .header {
        padding: 32px 20px 24px;
    }

    .form-section {
        padding: 0 20px 24px;
    }

    .title {
        font-size: 22px;
    }
}

@media (min-width: 768px) {
    .login-container {
        max-width: 480px;
    }
}

@media (min-width: 1200px) {
    body {
        padding: 40px;
    }

    .login-container {
        max-width: 500px;
    }

        .login-container:hover {
            transform: translateY(-4px);
            box-shadow: 0 25px 70px rgba(0, 0, 0, 0.12), 0 1px 3px rgba(0, 0, 0, 0.06);
        }
}

/* Animation for success state */
@keyframes success {
    0% {
        transform: scale(1);
    }

    50% {
        transform: scale(1.05);
    }

    100% {
        transform: scale(1);
    }
}

.success {
    animation: success 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}
/* OTP PANEL DESIGN */